KR20040063871A - Frequency conversion device of a satellite broadcasting ground repeater - Google Patents

Abstract

According to the present invention, local oscillation signals for frequency conversion of a plurality of signals are arranged at regular intervals to supply one local signal and a signal obtained by multiplying the signals as a local signal of a mixer to minimize interference between the outputs of the local oscillation means. The present invention relates to a frequency converting apparatus for a satellite broadcasting terrestrial repeater which reduces the number of oscillator elements. The present invention relates to a frequency converting apparatus for a satellite broadcasting terrestrial repeater having a first receiving means, the 12.2 GHz received from the first multi-satellite. A second receiving means for amplifying a horizontal polarization of 12.75 GHz to a predetermined level, passing only necessary horizontal polarizations, mixing with a 2 GHz oscillating signal output from a local oscillating means, and rearranging the second polarizing signal, and transmitting it to a high frequency coupler; Amplifies the vertical polarization from 12.2GHz to 12.75GHz to a certain level and passes only the required vertical polarization. Turn on and rearrange the mixed with the 1 GHz oscillation signal output from the local oscillation means, and then amplify the third receiving means transmitted to the high frequency coupler and the horizontal polarization of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, It consists of a fourth receiving means for passing only the necessary horizontal polarization, mixed with the 1 GHz oscillation signal output from the local oscillation means, rearranged, and transmitting the result to the high frequency coupler.

Description

Frequency conversion device for satellite broadcasting terrestrial repeater {FREQUENCY CONVERSION DEVICE OF A SATELLITE BROADCASTING GROUND REPEATER}

The present invention relates to a frequency converter of a satellite broadcasting terrestrial repeater, and more particularly, a mixer obtained by multiplying one local signal and its signal by arranging local oscillation signals for frequency conversion of a plurality of signals at regular intervals. The present invention relates to a frequency converter of a satellite broadcasting terrestrial repeater which is supplied as a local signal to minimize the interference between the outputs of the local oscillation means and reduce the number of oscillator elements.

In general, satellite broadcasting refers to broadcasting such as television broadcasting or PCM (pulse code modulation) broadcasting using a broadcasting satellite (BS: broadcasting satellite) located about 35,784 km from the earth.

In particular, satellite broadcasting is a broadcasting method for transmitting or retransmitting a signal by a space station mounted on a satellite to receive broadcasting directly in the general public. Broadcasting satellites can be classified into high output type and medium output type according to whether the receiving side is individual reception or joint reception. The satellite broadcasting of various countries of the world is mainly composed of the former type of individual receiving type, but there is also a medium output type broadcasting satellite for distribution to CATV (Cable TV), which is a type of receiving type.

In recent years, many countries serving satellite broadcasting have multiple satellites using the same frequency band. When retransmitting satellite signals from multiple satellites to a subscriber receiver using a terrestrial repeater, polarization (polarization depends on the plane to which the amplitude axis of the wave belongs, that is, the angle of the polarization plane to the ground is horizontal or vertical). Horizontal polarization is an electric wave emitted from the earth and the horizontal device antenna, and it is called H polarization using horizontal meaning horizontal, and vertical polarization is the antenna of the earth and vertical device. Is called V polarization by using Vertical which means vertical as a radio wave which is emitted from the signal.) Is a frequency that separates and receives satellite signals using different frequency bands and sends them as one signal to subscribers in shaded area with one polarization. Use an inverter. The configuration diagram of the frequency converter to be used for this purpose is shown in FIG.

As shown in FIG. 1, the frequency converter of the satellite broadcasting terrestrial repeater according to the related art has a predetermined level of vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from a first multi-satellite (not shown). A first band pass filter (BPF) for passing only necessary vertical polarizations among the first and second amplifiers (1) (3) and the vertical polarizations output from the second amplifier (3) ), A third amplifier 7 which amplifies the vertical polarization output from the first bandpass filter 5 to a predetermined level, and a horizontal polarization of 12.2 GHz to 12.75 GHz received from the first multi-satellite (polarization_H A fourth amplifier 9 for amplifying the signal at a predetermined level, a second band pass filter 11 for passing only necessary horizontal polarizations among the horizontal polarizations output from the fourth amplifier 9, and the second band pass filter. A fifth amplifier (13) for amplifying the horizontal polarization output from (11) to a predetermined level; and said fifth amplifier Only the first mixer 15 for mixing and rearranging the horizontally polarized signal output from (13) and the localized outgoing signal # 3 (17) and the band of the frequency rearranged signal outputted from the first mixer 15 are passed. A third band pass filter 19, a sixth amplifier 21 for amplifying the vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from the second multi-satellite (not shown) to a predetermined level; And a fourth band pass filter 23 for passing only necessary horizontal polarizations among the vertical polarizations output from the sixth amplifier 21, and amplifying the vertical polarizations output from the fourth band pass filter 23 to a predetermined level. A second mixer 27 for mixing and rearranging the seventh amplifier 25, the vertical polarization signal output from the seventh amplifier 25, and the local outgoing signal # 2 (29), and the second mixer 27; A fifth band pass filter 31 for passing only a band of the frequency rearranged signal output from the second multiple satellite; The eighth amplifier 33 for amplifying the horizontal polarization (polarization_H) of 12.75 GHz to 12.75 GHz received at a predetermined level, and the horizontal polarization output from the eighth amplifier 33 passing only the necessary horizontal polarization. A six-band pass filter 35, a ninth amplifier 37 for amplifying the horizontal polarization output from the sixth bandpass filter 35 to a predetermined level, and a horizontal polarization output from the ninth amplifier 37; A third mixer 39 for mixing and rearranging local outgoing signal # 1 (41) and a seventh bandpass filter (43) for passing only a band of the frequency rearranged signal output from the third mixer (39) And a signal output from the third amplifier 7, the third band pass filter 19, the fifth band pass filter 31, and the seventh band pass filter 43, and combines a band of 10.2 GHz to 13.8 GHz. It consists of a high frequency coupler 45 for outputting a frequency.

Referring to the operation of the frequency converter of the satellite broadcast terrestrial repeater configured as described above are as follows.

First, the first and second amplifiers (1) and (3) amplify a vertical polarization (polarization_V) of 12.75 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, and then amplify the amplified vertical polarization to the first. The band pass filter 5 transmits the result.

In addition, the first band pass filter 5 passes only necessary vertical polarizations among the vertical polarizations output from the second amplifier 3 and transmits the passed vertical polarizations to the third amplifier 7.

The third amplifier 7 amplifies the vertical polarization output from the first bandpass filter 5 to a predetermined level, and then transmits the amplified vertical polarization to the high frequency combiner 45.

In addition, the fourth amplifier 9 amplifies the horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, and then amplifies the amplified horizontal polarization to the second band pass filter 11. To send.

The second band pass filter 11 passes only necessary horizontal polarizations among the horizontal polarizations output from the fourth amplifier 9, and transmits the horizontal horizontal polarizations to the fifth amplifier 13.

The fifth amplifier 13 amplifies the horizontal polarization output from the second bandpass filter 11 to a predetermined level and then transmits the amplified horizontal polarization to the first mixer 15.

In addition, the first mixer 15 rearranges the frequencies by mixing the horizontal polarization output from the fifth amplifier 13 and the local outgoing signal # 3 (17), and then converts the frequency rearranged signal into a third band pass filter. Transmit to 19.

The third band pass filter 19 passes only a band of the frequency rearranged signal output from the first mixer 15 and transmits the passed frequency rearranged signal to the high frequency combiner 45.

Meanwhile, the sixth amplifier 21 amplifies the vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and then amplifies the amplified vertical polarization to the fourth band pass filter 23. To send.

In addition, the fourth band pass filter 23 passes only necessary vertical polarizations among the vertical polarizations output from the sixth amplifier 21 and transmits the passed vertical polarizations to the seventh amplifier 25.

The seventh amplifier 25 amplifies the vertical polarization output from the fourth bandpass filter 23 to a predetermined level, and then transmits the amplified vertical polarization to the second mixer 27.

In addition, the second mixer 27 rearranges frequencies by mixing the vertical polarization output from the seventh amplifier 25 and the local outgoing signal # 2 (29), and then converts the frequency rearranged signals into a fifth band pass filter. Transfer to 31.

The fifth band pass filter 31 passes only the band of the frequency rearranged signal output from the second mixer 27 and transmits the passed frequency rearranged signal to the high frequency combiner 45.

In addition, the eighth amplifier 33 amplifies the horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and then amplifies the amplified horizontal polarization to the sixth band pass filter 35. To send.

In addition, the sixth band pass filter 35 passes only the necessary horizontal polarizations among the horizontal polarizations output from the eighth amplifier 33 and transmits the passed horizontal polarizations to the ninth amplifier 37.

The ninth amplifier 37 amplifies the horizontal polarization output from the sixth bandpass filter 35 to a predetermined level and then transmits the amplified horizontal polarization to the third mixer 39.

In addition, the third mixer 39 rearranges the frequency by mixing the horizontal polarization output from the ninth amplifier 37 and the local outgoing signal # 1 (41), and then converts the frequency rearranged signal into a seventh band pass filter. Send to 43.

The seventh band pass filter 43 passes only a band of the frequency rearranged signal output from the third mixer 39 and transmits the passed frequency rearranged signal to the high frequency combiner 45.

Finally, the high frequency combiner 45 combines signals output from the third amplifier 7, the third band pass filter 19, the fifth band pass filter 31, and the seventh band pass filter 43. The frequency is output from the band 10.2GHz to 13.8GHz and transmitted to the subscriber including the shaded area.

At this time, the frequency conversion is made by the signal coming out without the frequency conversion and the signal flow part which makes the up-conversion frequency and the down-conversion frequency signal of the reception frequency by the local signal of 1 GHz and the local signal of 2 GHz. Loss of local signal is generated by combining with a high frequency coupler and transmitted.

Here, the local signal uses two signal sources and one signal source is used as a local signal using the same frequency.

However, since the frequency converter of the conventional satellite broadcasting terrestrial repeater generates a lot of unwanted waves during frequency conversion because the 1 GHz signal and the 2 GHz signal interfere with each other, a mechanical design for avoiding the interference between the frequency converted signal flows is proposed. There are many constraints such as mechanical size constraints, circuit complexity, and minimizing interference at radio frequencies.

Accordingly, the present invention has been proposed to solve the above-mentioned problems according to the prior art, and an object of the present invention is to retransmit the downlink satellite signals from a multi-satellite consisting of a plurality of satellites without interference with each other. The present invention provides an apparatus for converting a frequency of a terrestrial broadcast terrestrial repeater that is capable of retransmitting a plurality of signals of a multi-satellite signal to one transmitting antenna.

Features of the frequency converter of the satellite broadcast terrestrial repeater according to the present invention for achieving the above object,

Frequency conversion of a satellite broadcasting terrestrial repeater having a first receiving means for amplifying a vertical polarization of 12.75 GHz to 12.75 GHz received from a first multi-level satellite to a predetermined level and passing only necessary vertical polarization to a high frequency combiner 144. In the apparatus,

After amplifying the horizontal polarization of 12.75 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, passing only the necessary horizontal polarization, mixing and rearranging the 2 GHz oscillation signal output from the local oscillation means 500, Second receiving means for transmitting to 144;

After amplifying the vertical polarization of 12.75 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, passing only the required vertical polarization, mixing with the 1 GHz oscillation signal output from the local oscillation means 500 and rearranging, the high frequency combiner ( Third receiving means for transmitting to 144);

After amplifying the horizontal polarized wave of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, passing only the necessary horizontal polarized wave and mixing and rearranging the mixed signal with the 1 GHz oscillation signal outputted from the local oscillation means 500, a high frequency combiner ( 144) and fourth receiving means for transmitting.

1 is a block diagram showing a frequency conversion apparatus of a satellite broadcasting terrestrial repeater according to the prior art,

2 is a block diagram showing a frequency conversion apparatus for a satellite broadcasting terrestrial repeater according to the present invention;

3 is a diagram illustrating a first generation of the local oscillation signal of FIG. 2;

4 is a diagram illustrating a second generation of the local oscillation signal of FIG. 2.

<Explanation of symbols for the main parts of the drawings>

100, 102, 106, 108, 112, 118: amplifier

104, 110, 116, 120: Bandpass Filter

114: Mixer

144: high frequency coupler

500: local oscillation means

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the frequency converter of the satellite broadcasting terrestrial repeater according to the present invention will be described.

2 is a block diagram showing a frequency conversion apparatus for a satellite broadcasting terrestrial repeater according to the present invention.

As shown in FIG. 2, the frequency converter of the satellite broadcasting terrestrial repeater according to the present invention has a predetermined level of vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from a first multi-satellite (not shown). The first receiving means for passing the necessary vertical polarization only to the high frequency coupler 144 and the horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level. From the second receiving means and the second multi-satellite (not shown), passing through only the necessary horizontal polarization, mixed with the oscillation signal output from the local oscillation means 500, rearranged, and transmitted to the high frequency coupler 144. After amplifying the received vertical polarization (polarization_V) from 12.2 GHz to 12.75 GHz to a predetermined level, passing only the required vertical polarization, mixing and rearranging the oscillation signal output from the local oscillation means 500, and then the high frequency combiner 144. Before Oscillation output from the local oscillation means 500 by amplifying the horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the second multi-satellite and the second multi-satellite to a predetermined level, and passing only the necessary horizontal polarization. After mixing and rearranging the signal, the fourth receiving means for transmitting to the high frequency coupler 144 and the signal output from the first, second, third and fourth receiving means are combined to form a band of 10.2 GHz to 13.8 GHz. It consists of a high frequency coupler 144 that outputs the frequency to the subscriber including the shadow area.

Here, the first receiving means includes first and second amplifiers 100 and 102 for amplifying a vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, and the second signal. The first band pass filter (BPF) 104 which passes only the necessary vertical polarization among the vertical polarizations output from the amplifier 102 and the vertical polarization output from the first band pass filter 104 are fixed. And a third amplifier 106 which amplifies to a level.

The second receiving means includes a fourth amplifier 108 for amplifying a horizontal polarization (polarization_H) of 12.75 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, and from the fourth amplifier 108. A second band pass filter 110 for passing only the necessary horizontal polarizations among the horizontal polarizations output; a fifth amplifier 112 for amplifying the horizontal polarizations output from the second band pass filter 110 to a predetermined level; A first mixer 114 for mixing and rearranging the horizontal polarization output from the fifth amplifier 112 and the oscillation signal output from the local oscillation means 500, and the frequency rearrangement output from the first mixer 114 And a third band pass filter 116 for passing only the band of the signal.

The third receiving means includes a sixth amplifier 118 for amplifying the vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and from the sixth amplifier 118. A fourth bandpass filter 120 for passing only necessary horizontal polarizations among the vertical polarizations output; a seventh amplifier 122 for amplifying the vertical polarizations output from the fourth bandpass filter 120 to a predetermined level; A second mixer 128 for mixing and rearranging the vertical polarization output from the seventh amplifier 122 and the oscillation signal output from the local oscillation means 500, and the frequency rearrangement output from the second mixer 128 And a fifth band pass filter 130 for passing only the band of the signal.

The fourth receiving means includes an eighth amplifier 132 for amplifying a horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and from the eighth amplifier 132. A sixth band pass filter 134 for passing only necessary horizontal polarizations among the horizontal polarizations output; a ninth amplifier 136 for amplifying the horizontal polarization output from the sixth band pass filter 134 to a predetermined level; A third mixer 138 for mixing and rearranging the horizontal polarization signal output from the ninth amplifier 136 and the oscillation signal output from the local oscillation means 500, and the frequency rearrangement output from the third mixer 138. And a seventh band pass filter 142 for passing only a band of the signal.

On the other hand, the local oscillation means 500, as in the first embodiment shown in Figure 3, the local oscillation signal unit 200 for outputting the oscillation signal of 1 GHz, and the 1 GHz output from the local oscillation signal unit 200 An amplifier 202 for amplifying the oscillation signal to a predetermined level, a coupler 204 for analyzing a form of the frequency signal by distributing a part of the frequency signal output from the amplifier 202, and an output from the coupler 204 A splitter 206 for distributing some frequency signals by 1 GHz to the second mixer 128 of the third receiving means and the third mixer 138 of the fourth receiving means, and outputting some frequency signals from the coupler 204. A band pass filter 208 for passing only the band of the frequency rearranged signal among the signals, and amplifying the frequency signal output from the band pass filter 208 to a predetermined level, thereby performing 2 GHz to the first mixer 114 of the second receiving means. It consists of an amplifier 210 for outputting.

On the other hand, the local oscillation means 500 is, as in the second embodiment shown in Figure 4, the local oscillation signal unit 300 for outputting the oscillation signal of 1 GHz, and the 1 GHz output from the local oscillation signal unit 300 Amplifies the oscillation signal at a predetermined level and outputs 1 GHz to the third mixer 138 of the fourth receiving means, and the 1 GHz oscillation signal output from the local oscillation signal part 300 to a predetermined level. The coupler 306 which outputs 1 GHz to the second mixer 128 of the third receiving means after analyzing the shape of the frequency signal by distributing a part of the frequency signal output from the amplifier 304 and the amplifier 304 to amplify. And a band pass filter 308 for passing only a band of the frequency rearranged signal among some frequency signals output from the coupler 306, and amplifying the frequency signal output from the band pass filter 308 to a predetermined level. 2 GHz to the first mixer 114 of the second receiving means. It consists of the amplifier 310 to force.

Referring to the operation of the frequency converter of the satellite broadcasting terrestrial repeater according to the present invention configured as described above are as follows.

First, the first and second amplifiers 100 and 102 amplify a vertical polarization (polarization_V) from 12.2 GHz to 12.75 GHz received at a first level to a predetermined level, and then amplify the amplified vertical polarization to the first. The band pass filter 104 transmits the result.

The first band pass filter 104 passes only the necessary vertical polarizations among the vertical polarizations output from the second amplifier 102 and transmits the vertical polarizations to the third amplifier 106.

The third amplifier 106 amplifies the vertical polarization output from the first bandpass filter 104 to a predetermined level, and then transmits the amplified vertical polarization to the high frequency combiner 144.

In addition, the fourth amplifier 108 amplifies the horizontal polarization (polarization_H) of 12.75 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, and then amplifies the amplified horizontal polarization to the second band pass filter 110. To send.

The second band pass filter 110 passes only necessary horizontal polarizations among the horizontal polarizations output from the fourth amplifier 108 and transmits the horizontal horizontal polarizations to the fifth amplifier 112.

The fifth amplifier 112 amplifies the horizontal polarization output from the second bandpass filter 110 to a predetermined level and then transmits the amplified horizontal polarization to the first mixer 114.

In addition, the first mixer 114 mixes the horizontal polarization output from the fifth amplifier 112 and the 2 GHz frequency signal from the local oscillation means 500 to rearrange the frequencies, and then converts the frequency rearranged signals into the third band. Transmit to pass filter 116.

The third band pass filter 116 passes only the band of the frequency rearranged signal output from the first mixer 114 and transmits the passed frequency rearranged signal to the high frequency combiner 144.

Meanwhile, the sixth amplifier 118 amplifies the vertical polarization (polarization_V) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and then amplifies the amplified vertical polarization to the fourth band pass filter 120. To send.

The fourth band pass filter 120 passes only necessary vertical polarizations among the vertical polarizations output from the sixth amplifier 118 and transmits the vertical polarizations to the seventh amplifier 122.

The seventh amplifier 122 amplifies the vertical polarization output from the fourth bandpass filter 120 to a predetermined level and then transmits the amplified vertical polarization to the second mixer 128.

Then, the second mixer 128 mixes the vertical polarization output from the seventh amplifier 122 and the 1 GHz frequency signal from the local oscillation means 500 to rearrange the frequencies, and then rearranges the frequency rearranged signals to the fifth band. Transmission to the pass filter 130.

The fifth band pass filter 130 passes only the band of the frequency rearranged signal output from the second mixer 128 and transmits the passed frequency rearranged signal to the high frequency combiner 144.

In addition, the eighth amplifier 132 amplifies the horizontal polarization (polarization_H) of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and then amplifies the amplified horizontal polarization to the sixth band pass filter 134. To send.

The sixth bandpass filter 134 passes only the horizontal polarization necessary among the horizontal polarizations output from the eighth amplifier 132 and transmits the horizontal horizontal polarization to the ninth amplifier 136.

The ninth amplifier 136 amplifies the horizontal polarization output from the sixth bandpass filter 134 to a predetermined level and then transmits the amplified horizontal polarization to the third mixer 138.

In addition, the third mixer 138 mixes the horizontal polarization output from the ninth amplifier 136 and the 1 GHz frequency signal from the local oscillation means 500 to rearrange the frequencies, and then converts the frequency rearranged signals into the seventh band. It passes to the pass filter 142.

The seventh band pass filter 142 passes only the band of the frequency rearranged signal output from the third mixer 138 and transmits the passed frequency rearranged signal to the high frequency combiner 144.

Finally, the high frequency combiner 144 combines the signals output from the third amplifier 106, the third band pass filter 116, the fifth band pass filter 130 and the seventh band pass filter 142. The frequency is output from the band 10.2GHz to 13.8GHz and transmitted to the subscriber including the shaded area.

Here, the high frequency coupler 144 is rearranged to different frequency bands, and determines the signal frequency of the local oscillation means 500 so that the frequency of the rearranged output signal is in the range of 10.2GHz to 13.80GHz. At this time, the local oscillation frequency is 1 GHz and 2 GHz so as to easily implement a band pass filter for removing the unwanted wave generated in the frequency conversion process of each band without overlapping the four frequency bands.

In addition, referring to the frequency rearrangement process, in FIG. 2, four input signals of the same frequency band are input and one (satellite_ # 1, polarization_V) is amplified without frequency conversion. The remaining three signals are frequency-converted by signals of local oscillation means (1 GHz, 2 GHz). That is, satellites # 2, polarization_V, and polarization_H are converted into signals of 11 GHz band and 13 GHz band by local oscillator signals of 1 GHz, and satellites # 1 and polarization _H are converted into signals of 10 GHz band, respectively. Each signal is passed through a bandpass filter for elimination of unwanted waves, passed through an amplifier to compensate for losses at each stage, and to bring the final output level to the level required by the relay system. To get the final output.

On the other hand, the operation of the first embodiment of the local oscillation means 500 will be described with reference to FIG.

First, the amplifier 202 amplifies the 1 GHz oscillation signal output from the local oscillation signal unit 200 to a predetermined level, and transmits the amplified oscillation signal to the coupler 204.

The coupler 204 distributes a portion of the frequency signal output from the amplifier 202 to analyze the shape of the frequency signal, and then transmits the frequency signal to the divider 206 and the bandpass filter 208.

The divider 206 divides and outputs a part of frequency signals output from the coupler 204 to the second mixer 128 of the third receiving means and the third mixer 138 of the fourth receiving means by 1 GHz.

In addition, the bandpass filter 208 passes only the band of the frequency rearranged signal output from the coupler 204 and transmits the passed frequency rearranged signal to the amplifier 210.

The amplifier 210 amplifies the frequency signal output from the band pass filter 208 to a predetermined level and outputs 2 GHz to the first mixer 114 of the second receiving means.

On the other hand, the operation of the second embodiment of the local oscillation means 500 will be described with reference to FIG.

First, the amplifier 302 and the amplifier 304 amplify the 1 GHz oscillation signal output from the local oscillation signal unit 300 to a predetermined level.

The amplifier 302 outputs the amplified partial frequency signal to the third mixer 138 of the fourth receiving means by 1 GHz.

The amplifier 304 also transmits the amplified partial frequency signal to the coupler 306.

The coupler 306 distributes a part of the frequency signal output from the amplifier 304, analyzes the shape of the frequency signal, and then transmits a part of the frequency signal to the band pass filter 308 as well as the third receiving means. 1 GHz is output to the second mixer 128.

In addition, the bandpass filter 308 passes only the band of the frequency rearranged signal output from the coupler 306 and transmits the passed frequency rearranged signal to the amplifier 310.

The amplifier 310 amplifies the frequency signal output from the band pass filter 308 to a predetermined level and outputs 2 GHz to the first mixer 114 of the second receiving means.

In other words, the signal configuration of the local oscillation means for frequency conversion is generated from one local oscillation means, as shown in Figs. This local oscillation means uses a phase locked loop (PLL) type oscillator. The local oscillator means mixes the output of the PLL oscillator with the mixer to obtain a signal of 1 GHz lower or higher than the input frequency of the frequency conversion module, and then obtains the up and down signals. Pass the band pass filter. In order to obtain a signal 2 GHz lower than the input signal of the frequency conversion RF module, only the second harmonic component of the 1 GHz PLL output signal component is filtered through a band pass filter, and then amplified and mixed with a mixer to obtain a signal of the 10 GHz band. In the conventional method, the phase of the 2 GHz signal and the local oscillator signal of 1 GHz are directly oscillated, and in this case, the noise of the output signal increases and becomes unstable due to the interference between the 1 GHz and 2 GHz signals.

These frequency-converted signals are combined in a wideband high frequency combiner to provide retransmission signals as shown in Table 1.

Satellite Polarization method Separation frequency Rearrangement frequency First satellite V polarization -1000 MHz 10.20 to 10.80 ㎓ H polarization -1000 MHz 11.20 to 11.80 ㎓ Second satellite V polarization 0 12.20-12.80 ㎓ H polarization -2000MHz 13.20 to 13.80 ㎓

As described above, the frequency conversion RF module that can be used in the satellite broadcasting terrestrial repeater according to the present invention can retransmit the downlink satellite signals from the multi-satellites without frequency interference and retransmit them to the subscribers in the shadow area. It has an effect.

In addition, it is possible to retransmit a plurality of signals of the multi-satellite to one transmitting antenna by rearranging frequencies so that downlink satellite signals from the multi-satellite consisting of a plurality of satellites are retransmitted without interference with each other.

Claims (8)

Frequency conversion of a satellite broadcasting terrestrial repeater having a first receiving means for amplifying a vertical polarization of 12.75 GHz to 12.75 GHz received from a first multi-level satellite to a predetermined level and passing only necessary vertical polarization to a high frequency combiner 144. In the apparatus, After amplifying the horizontal polarization of 12.75 GHz to 12.75 GHz received from the first multi-satellite to a predetermined level, passing only the necessary horizontal polarization, mixing and rearranging the 2 GHz oscillation signal output from the local oscillation means 500, Second receiving means for transmitting to 144; After amplifying the vertical polarization of 12.75 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, passing only the required vertical polarization, mixing with the 1 GHz oscillation signal output from the local oscillation means 500 and rearranging, the high frequency combiner ( Third receiving means for transmitting to 144); After amplifying the horizontal polarized wave of 12.2 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, passing only the necessary horizontal polarized wave and mixing and rearranging the mixed signal with the 1 GHz oscillation signal outputted from the local oscillation means 500, a high frequency combiner ( 144) the frequency converter of the satellite broadcasting terrestrial repeater, characterized in that consisting of a fourth receiving means for transmitting. The method of claim 1, The second receiving means includes a fourth amplifier 108 for amplifying a horizontal polarization of 12.75 GHz to 12.75 GHz received from the first multi-stage to a predetermined level, and a horizontal polarization output from the fourth amplifier 108. A second band pass filter 110 that passes only horizontal polarization, a fifth amplifier 112 that amplifies the horizontal polarization output from the second band pass filter 110 to a predetermined level, and the fifth amplifier 112. Passes only the first mixer 114 for mixing and rearranging the horizontal polarization output from the oscillation signal output from the local oscillation means 500 and only the band of the frequency rearranged signal output from the first mixer 114. And a third band pass filter (116). The method of claim 1, The third receiving means includes a sixth amplifier 118 for amplifying the vertical polarization of 12.75 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and a vertical polarization output from the sixth amplifier 118. A fourth bandpass filter 120 for passing only horizontal polarization, a seventh amplifier 122 for amplifying the vertical polarization output from the fourth bandpass filter 120 to a predetermined level, and the seventh amplifier 122 Only the second mixer 128 for mixing and rearranging the vertical polarization outputted from the oscillation signal output from the local oscillation means 500 and only the band of the frequency rearranged signal outputted from the second mixer 128 Frequency converter of the satellite broadcasting terrestrial repeater, characterized in that consisting of a fifth band pass filter 130 to. The method of claim 1, The fourth receiving means includes an eighth amplifier 132 for amplifying a horizontal polarization of 12.75 GHz to 12.75 GHz received from the second multi-satellite to a predetermined level, and a horizontal polarization output from the eighth amplifier 132. A sixth bandpass filter 134 for passing only horizontal polarization, a ninth amplifier 136 for amplifying the horizontal polarization output from the sixth bandpass filter 134 to a predetermined level, and the ninth amplifier 136 Passes only the third mixer 138 for mixing and rearranging the horizontal polarization output from the oscillation signal output from the local oscillation means 500 and the band of the frequency rearranged signal output from the third mixer 138. And a seventh band pass filter (142). The method of claim 1, The local oscillation means 500 includes a local oscillation signal unit 200 for outputting a 1 GHz oscillation signal, and an amplifier 202 for amplifying a 1 GHz oscillation signal output from the local oscillation signal unit 200 to a predetermined level. And a coupler 204 for distributing a part of the frequency signal output from the amplifier 202 to analyze the shape of the frequency signal, and a second mixer for receiving some frequency signal output from the coupler 204. A divider 206 for distributing 1 GHz by 1 GHz to the third mixer 138 of the fourth receiving means and a band for passing only a frequency rearranged signal of some frequency signals output from the coupler 204. A pass filter 208 and an amplifier 210 for amplifying the frequency signal output from the band pass filter 208 to a predetermined level and outputting 2 GHz to the first mixer 114 of the second receiving means. Of satellite broadcasting repeater Frequency inverter. The method of claim 1, The local oscillation means 500 amplifies the local oscillation signal part 300 for outputting the oscillation signal of 1 GHz and the 1 GHz oscillation signal outputted from the local oscillation signal part 300 to a predetermined level to receive the fourth reception means. An amplifier 302 for outputting 1 GHz to the third mixer 138 of the amplifier, an amplifier 304 for amplifying a 1 GHz oscillation signal output from the local oscillation signal unit 300 to a predetermined level, and the amplifier 304 A coupler 306 for outputting 1 GHz to the second mixer 128 of the third receiving means after analyzing a shape of the frequency signal by distributing a part of the frequency signal outputted from the third signal, and some frequencies output from the coupler 306. Band pass filter 308 which passes only the band of the frequency rearranged signal among the signals, and amplifies the frequency signal output from the band pass filter 308 to a predetermined level to 2GHz to the first mixer 114 of the second receiving means. It consists of an amplifier 310 for outputting Satellite frequency conversion device of ground repeaters to. The method of claim 1, The local oscillation signal of the local oscillation means 500 is used as a local oscillator signal of the frequency converter after amplifying the signal of the lowest frequency and distributing it to the divider, and band-pass only the second harmonic signal of the amplifier output of the lowest frequency signal. A frequency converter of a satellite broadcasting terrestrial repeater, characterized in that for generating a different transmission rearrangement frequency by amplifying a signal generated after the filter. The method of claim 1, The local oscillation signal of the local oscillation means 500 is used as a local oscillator signal of the frequency converter by amplifying the signal of the lowest frequency respectively, and is generated after filtering only the second harmonic signal of one amplifier output with the band pass filter. A frequency converter of a satellite terrestrial repeater, characterized in that for amplifying a signal to make another transmission rearrangement frequency.