CN102306864B - Broadband waveguide variable power divider - Google Patents

Abstract

The invention relates to a broadband waveguide variable power divider. One end of the rectangular waveguide of the power divider is provided with a feeding coaxial connector through the feeding matching block, and the end of the feeding coaxial connector extends to the outside of one side of the rectangular waveguide; the rectangular waveguide There are two parallel sliding grooves on the other side of the other end of the inner side, and the two coupling output coaxial connectors are respectively arranged in the two sliding grooves, and can slide in the sliding grooves; the two coupling output coaxial connectors are The axial connector corresponds to the feeding coaxial connector; a pair of coupling matching blocks are respectively arranged on the inner walls of the two sides of the rectangular waveguide corresponding to the two coupling output coaxial connectors. The distance between the two coupling output coaxial connectors of the present invention is constant and can slide in the longitudinal direction of the waveguide. By changing the positions of the two coaxial connectors in the longitudinal direction of the rectangular waveguide, a variable power ratio can be realized; The invention has the advantages of wide band, continuously variable power division ratio in the working frequency band, simple structure and the like.

Description

A Broadband Waveguide Variable Power Divider

technical field

The invention belongs to the technical field of microwave passive devices, and in particular relates to a broadband waveguide power divider.

Background technique

In earthquake-stricken areas, once the land communication facilities in mountainous areas are destroyed, it is very difficult to repair and rebuild. In the critical stage of rescue and when the traffic is seriously damaged, it is very important for the rescue work and reconstruction work of the disaster area to be able to communicate with the outside world in time and spread the actual situation of the disaster area in time. The mobile satellite ground station communication system, (Mobile Communication) can transmit pictures and video information in real time through satellites, overcome geographical restrictions and equipment constraints, and provide more substantial and rapid first-hand information for decision-making by relevant state departments, and better Do disaster relief work.

Mobile communication equipment is generally installed on high-mobility vehicles, ships and even aircraft, which puts forward high requirements for the stable tracking of its beams, and polarization multiplexing is widely used in satellite communications to achieve double output at the same frequency. The stability of culturalization is extremely important. In order to receive the information transmitted by the satellite without loss, the polarization of the receiving antenna must be consistent with the polarization of the electromagnetic wave transmitted by the satellite. Linear polarization and circular polarization are usually used in satellite communication services. For circularly polarized satellite communication services, as far as the vehicle-mounted mobile communication flat-panel antenna is concerned, attitude changes such as severe bumps and non-stop yaw changes when the car is running will inevitably lead to satellite pointing errors and polarization deflection angles. Long-term translation will also cause polarization error angles due to changes in geographic latitude and longitude. The vehicle-mounted mobile circularly polarized panel antenna realizes different circular polarizations through the different ratios of the phase and amplitude between the two-wire polarized antennas, so a variable power divider is required to realize it.

For different car body attitudes and different geographical latitude and longitude, the required antenna polarization is also arbitrarily variable, so it is a necessary condition for lossless reception to realize a variable power divider.

Contents of the invention

In order to solve the problems of polarization changes brought about by vehicle attitude changes and geographic longitude and latitude changes while in motion and communication, and realize the lossless reception of the receiving antenna, the invention provides a broadband waveguide variable power divider.

The technical solution to achieve the above purpose is as follows:

A broadband waveguide variable power splitter, comprising a rectangular waveguide, a feeding coaxial connector and a coupling output coaxial connector, one end of the rectangular waveguide is provided with a three-layer stepped feeding matching block; the feeding The coaxial connector is arranged on the highest layer of the feed matching block, and the end of the feed coaxial connector extends to the outside of one side of the rectangular waveguide, the rectangular waveguide, the feed coaxial connector and the feed The matching block constitutes a coaxial waveguide converter; the other end of the rectangular waveguide is provided with two parallel chutes 9 along the width direction, and a slidable flat plate 8 is arranged in the two parallel chutes 9, A first coupling output coaxial connector 2 and a second coupling output coaxial connector 3 are fixedly arranged on the plate 8 along the width direction of the rectangular waveguide, and the first coupling output coaxial connector 2 and the second coupling output coaxial The distance between the connectors 3 is 1/2 of the width of the rectangular waveguide, the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 can be in two parallel chute 9 together with the plate 8 Sliding; and the ends of the two coupling output coaxial connectors extend outside the wide side of one side of the rectangular waveguide, corresponding to the feeding coaxial connector; the rectangular waveguide corresponding to the two coupling output coaxial connectors A pair of coupling matching blocks are respectively arranged on the inner walls on both sides of the body.

The width, height, and length of the rectangular waveguide are 16mm, 6mm, and 40mm respectively; the distance between the feed coaxial connector and the short-circuit end of the adjacent rectangular waveguide is 4mm; the two coupling output coaxial connectors The distance between them is 8mm, and the distance between the two coupled output coaxial connectors and the short-circuit end of the adjacent rectangular waveguide is 4-15mm.

Compared with the prior art, the present invention has the following beneficial technical effects: the present invention is equipped with a coaxial connector on the wide side of one end of the rectangular waveguide, and two The coaxial connector that can slide on the top can realize the variable power ratio by changing the position of the two coaxial connectors in the transverse direction of the rectangular waveguide; it has the advantages of wide band, continuously variable power ratio in the working frequency band, and simple structure. .

When the first coupling output coaxial connector 2 and the second coupling output coaxial connector 3 move on the rectangular waveguide 100, the standing wave curve of the feeding coaxial connector 1 is shown in FIG. 6; it can be seen from the curve that, Changing the coupling output energy of the coupling output coaxial connectors 2 and 3, the standing wave of the feeding coaxial connector 1 does not change much, and the standing wave in the working frequency band is basically less than 1.8.

When the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 move on the rectangular waveguide 100, the output energy of the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 moves with the The curve of the distance change is shown in Figure 7; it can be seen from the curve that when the plate 8 slides in the two parallel chutes, the output energy of the first coupled output coaxial connector 2 and the second coupled output coaxial connector 3 It can be changed continuously from -60dB to 0dB.

When the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 move on the rectangular waveguide 100, the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 follow the moving distance change, the curve of coupled output energy changing with frequency, see Figure 8; from this curve, it can be seen that the coupled output energy of the first coupled output coaxial connector 2 and the second coupled output coaxial connector 3 are compared in the entire working frequency band flat.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the present invention. the

Figure 3 is a partial enlarged view of the coaxial waveguide converter.

FIG. 4 is a top view of FIG. 1 .

Fig. 5 is a bottom view of Fig. 4 .

Fig. 6 is a standing wave curve of the present invention.

Fig. 7 is a graph showing the variation of the coupling output energy of the coupling output tap with position according to the present invention.

FIG. 8 is a graph showing the variation of the coupling output tap with frequency when the position of the coupling output tap is moved.

Detailed ways

The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

Example:

A preferred embodiment of the present invention is a broadband variable power divider used in Ku-band mobile communication.

As shown in FIG. 1 and FIG. 2 , a broadband waveguide variable power splitter includes a rectangular waveguide 100 , a feeding coaxial connector 1 and two coupling output coaxial connectors. One end of the rectangular waveguide 100 is fixedly installed with a three-layer stepped feeding matching block 4; the feeding coaxial connector 1 is fixedly installed on the highest layer of the feeding matching block 4, as shown in Fig. 2 and Fig. 3, and the feeding The end of the coaxial connector 1 extends to the outside of one wide side of the rectangular waveguide, and the rectangular waveguide 100, the feeding coaxial connector 1 and the feeding matching block 4 constitute a coaxial waveguide converter. Referring to Fig. 2, two parallel slide grooves are fixedly installed on one wide side of the other end of the rectangular waveguide 100 along the width direction, and a slidable flat plate 8 is housed in the two parallel slide grooves, and the flat plate 8 runs along the rectangular waveguide. The width direction of the pipe is fixedly installed with a first coupling output coaxial connector 2 and a second coupling output coaxial connector 3, and the first coupling output coaxial connector 2 and the second coupling output coaxial connector 3 The spacing is half of the width of the rectangular waveguide, and the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 can slide together with the plate 8 in two parallel sliding slots. The ends of the two coupling output coaxial connectors extend to the outside of one side of the rectangular waveguide, corresponding to the feeding coaxial connector 1; coaxial with the first coupling output coaxial connector 2 and the second coupling output A pair of coupling matching blocks 5 are respectively fixedly installed on the inner walls of both sides of the rectangular waveguide corresponding to the connector 3 .

The feeding coaxial connector 1 feeds the rectangular waveguide 100, which is coupled and output by the first coupling output coaxial connector 2 and the second coupling output coaxial connector 3, through the position of the flat plate 8 in the two parallel chutes. change, the positions of the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 in the width direction of the rectangular waveguide 100 are changed, and the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 2 are changed. Coupling of the coaxial connector 3 outputs energy, thereby forming a broadband variable power splitter, as shown in FIGS. 1-6 .

Referring to Fig. 4 and Fig. 5, the dimensions of the rectangular waveguide 100 are: Ww=16mm, WH=6mm, WL=40mm; the dimensions of the feed matching block 4 are: ML1=3mm, MH1=4.5mm, ML2=4.7mm, MH2=3.2mm, ML3=4.8mm, MH3=1.8mm, Mw=8.5mm; the distance between the feeding matching block 4 and the short-circuit end face 7 of the rectangular waveguide 100 is: MSL=2.6mm; the feeding coaxial connector 1 The distance from the short-circuit end face 7 of the rectangular waveguide 100 is: MRL=4.0mm; the distance between the first outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 is: PL=8.0mm; the first The distance between the outcoupling coaxial connector 2 and the second outcoupling coaxial connector 3 and the short-circuit end face 6 of the rectangular waveguide 100 is: SRL=4mm; the first outcoupling coaxial connector 2 and the second outcoupling coaxial connection The depth at which the device 3 is inserted into the rectangular waveguide 100 is: Ph=4.2mm; the size of the coupling matching block 5 is: Sw=0.5mm, Sh=1.42mm, Ms=0.92mm; the distance between the coupling matching block 5 and the short-circuit end face of the rectangular waveguide 100 is 6 The distance is: SL1=3.04mm, SL2=4.46mm; the inner diameter of the conductor of the feed coaxial connector 1, the first coupling output coaxial connector 2 and the second coupling output coaxial connector 3 is Φ=0.8mm .

Claims (2)

1. A broadband waveguide variable power splitter, comprising a rectangular waveguide, a feed coaxial connector and a coupling output coaxial connector, characterized in that: one end of the rectangular waveguide is provided with three layers of stepped feed Electric matching block; the feeding coaxial connector is arranged on the highest layer of the feeding matching block, and the end of the feeding coaxial connector extends to the outside of one side of the rectangular waveguide, and the rectangular waveguide and the feeding The axial connector and the feed matching block form a coaxial waveguide converter; the other end of the rectangular waveguide is provided with two parallel sliding slots (9) along the width direction on one wide side, and the two parallel sliding slots (9 ) is provided with a slidable flat plate (8), on which the first coupling output coaxial connector (2) and the second coupling output coaxial connector (3) are fixed along the width direction of the rectangular waveguide , and the distance between the first outcoupling coaxial connector (2) and the second outcoupling coaxial connector (3) is half the width of the rectangular waveguide, the first outcoupling coaxial connector (2 ) and the second coupling output coaxial connector (3) can slide together with the plate (8) in two parallel chute (9); and the ends of the two coupling output coaxial connectors extend to the rectangular waveguide The outside of one wide side corresponds to the feeding coaxial connector; a pair of coupling matching blocks are respectively arranged on the inner walls of both sides of the rectangular waveguide corresponding to the two coupling output coaxial connectors. 2. A broadband waveguide variable power divider according to claim 1, characterized in that: the width, height, and length of the rectangular waveguide are 16mm, 6mm, and 40mm respectively; the feed coaxial connector The distance from the short-circuit end of the adjacent rectangular waveguide is 4 mm; the distance between the two coupling output coaxial connectors is 8 mm, and the distance between the two coupling output coaxial connectors and the short-circuit end of the adjacent rectangular waveguide is 4 mm. ~15mm.

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