CN201868545U - Higher harmonic suppression device of cavity filter - Google Patents

Abstract

The utility model relates to a higher harmonic suppression device of a cavity filter, which comprises a base and a cover body covered on the base, wherein the base is provided with an upper input through groove and a lower input through groove which are communicated with each other, the surface of the side wall of the base is provided with a plurality of output terminals which extend to the inside by a metal conductor, the base is concavely provided with a resonance space which is communicated with the input through groove by the zigzag extension of the metal conductor, the resonance space is provided with a plurality of cavities which are communicated with each other, two side walls at the communicated part of the adjacent cavities are connected with a clapboard which forms a channel above, the cover body is respectively locked with an adjusting element which can adjust the upper displacement and the lower displacement in alignment with a plurality of lockholes of each cavity and each clapboard, the plurality of adjusting elements are respectively provided with a resonance adjusting rod which is aligned with each cavity and an inhibition adjusting rod which is aligned with each clapboard, the space of the channel, so as to suppress the noise generated by the higher harmonics and further achieve the purpose of clear signal without distortion.

Description

Higher Harmonic Suppression Device of Cavity Filter

technical field

The utility model relates to a filter structure.

Background technique

Wireless communication is an extremely important part of today's communication industry, such as radio, wireless phone, mobile phone, Bluetooth, global satellite positioning system (GPS), wireless network and other wireless communication can be seen everywhere around life, and in the field of wireless communication Among them, the antenna is a key technology that cannot be discarded, especially in the long-distance microwave communication, which considers a wider level.

The antenna converts the electromagnetic wave in the atmosphere into a current signal by coupling, and then transmits it to the equipment connected to the back end. During the coupling process, the frequency response of its filter is extremely important. With a good frequency response, it can Improve the sensitivity during coupling, and at the same time, it can accurately operate within the required working bandwidth, and has the effect of filtering out noise, so that the signal can still be played clearly after receiving.

Therefore, please refer to Fig. 6, wherein the filter is provided with an input slot A 1 through the base A, and the base A is provided with a resonance that communicates with the input slot A 1 and communicates with a plurality of chambers A 21 Space A 2, the two ends of the resonance space A 2 away from the input tank A 1 are provided with an output end A 3 extending from the outer wall into the interior, and a cover plate B is provided on the top of the seat body A, and the lower surface of the cover plate B There are a plurality of guide rods B 1 extending into each chamber A 21, and the frequency response of each chamber A 21 and guide rod B 1 is used to improve the coupling sensitivity and adjust the working bandwidth.

However, as the fields and products that use wireless signals continue to increase, the bandwidth of wireless signals and wireless signals transmitted in the air continue to increase, and the interference of guided wireless signals during transmission in the air becomes more and more serious (please Refer to FIG. 7 ), and there are problems of unclear and distorted signals, making the received signals unusable.

Therefore, how to solve the problems and deficiencies in the use of existing filters is the direction that relevant manufacturers engaged in this industry want to study and improve.

Contents of the invention

Therefore, in view of the above-mentioned problems and deficiencies, the designer of the utility model has collected relevant information, evaluated and considered in many ways, and based on years of experience accumulated in this industry, through continuous trial and modification, he designed this kind of utility model that allows High-order harmonic suppression device for cavity filters with clear and undistorted signals.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A high-order harmonic suppression device for a cavity filter, characterized in that it includes a base and a cover covering the base; wherein:

The base is provided with an input through groove connecting the upper and the lower, and a plurality of output terminals are provided on the surface of the side wall of the base. Each output terminal has a metal conductor extending into the base, and a metal conductor is provided on the base. Extending into and zigzagging into the resonance space connected to the input through groove, the resonance space has a plurality of connected chambers, and the two side walls of the connection between adjacent chambers are connected with a partition forming a channel above;

A plurality of lockholes with internal threads are respectively pierced on the cover to align with each chamber and each partition, and each lockhole is locked with an adjustment element with an external thread that can be adjusted for up and down displacement. The adjustment elements have resonance adjustment rods aligned with each chamber and suppression adjustment rods with alignment with each partition to reduce the signal space for high-order harmonic transmission, and each resonance adjustment rod and suppression adjustment rod are respectively connected to the bottom surface of each chamber, each There is a space between the partitions.

Wherein: the bottom surface of the plurality of chambers of the base is protrudingly provided with a resonant body, and each resonant body is concavely provided with a groove for the resonance adjustment rod to extend downward from the top surface.

Wherein: each partition plate of the base is further provided with accommodating grooves for restraining the adjustment rods from extending downward on the top surface.

Wherein: each resonance adjustment rod and each suppression adjustment rod of the plurality of adjustment elements provided on the cover has a screw head extending from one end protruding from the top surface of the cover.

Wherein: the resonance adjustment rods and the suppression adjustment rods of the plurality of adjustment elements provided on the cover are provided with nuts at one end protruding from the top surface of the cover.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

The two side walls of the connection between the base and the adjacent chambers of the utility model are connected with partitions forming channels above, and the channels are reduced by each partition and the suppression adjustment rod, so that the space for high-order harmonic transmission signals is reduced, so that the suppression The noise formed by high-order harmonics can achieve the purpose of clear and undistorted signals.

The partition of the utility model can be provided with accommodating grooves on the top surface facing downwards. When the cover body is covered on the upper surface of the base, each restraining adjustment rod will not touch the partition during adjustment, which can avoid the occurrence of In the case where the filter cannot be filtered due to the contact of the restraint adjustment rod with the partition, it is not necessary to repeatedly adjust the restraint adjustment rod, thereby achieving the purpose of convenient adjustment and quick and time-saving purposes.

Description of drawings

Fig. 1 is the perspective view of the preferred embodiment of the utility model;

Fig. 2 is a three-dimensional exploded view of a preferred embodiment of the present invention;

Fig. 3 is a three-dimensional appearance view of the base of another embodiment of the utility model;

Fig. 4 is a three-dimensional appearance view of the base of another embodiment of the utility model;

Fig. 5 is a noise measurement diagram when the utility model is in use;

Fig. 6 is an existing three-dimensional exploded view;

Fig. 7 is a noise measurement diagram when the utility model is used.

Explanation of reference signs: 1-base; 11-input through groove; 132-resonant body; 12-output terminal; 1321-groove; 121-metal conductor; 133-partition plate; 13-resonance space; Groove; 131-chamber; 14-channel; 2-cover; 21-lock hole; 222-inhibition adjustment rod; 22-adjustment element; 223-screw head; 221-resonance adjustment rod; 224-nut.

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the utility model are hereby drawn to illustrate in detail the features and functions of the preferred embodiments of the utility model as follows, so as to facilitate a complete understanding.

Please refer to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, which are the three-dimensional appearance diagram, the three-dimensional exploded view, the three-dimensional appearance diagram of the base of another embodiment, and the base of another embodiment of the utility model. The three-dimensional appearance diagram of the figure, it can be clearly seen from the figure that the high-order harmonic suppression device of the cavity filter includes a base 1 and a cover 2 covering the base 1; wherein:

The base 1 is provided with an input through groove 11 connecting the upper and lower sides, and a plurality of output terminals 12 are provided on the side wall surface of the base 1, and each output terminal 12 has a metal conductor 121 extending into the base 1, and then on the side wall surface of the base 1. The base 1 is concavely provided with a resonant space 13 for the metal conductor 121 to extend into and communicate with the input through groove 11 in a zigzag shape. The resonant space 13 is provided with a resonant body 132 on the bottom surface of the connected plurality of chambers 131. Each resonant body 132 is concavely provided with a groove 1321 from the top surface, and a partition 133 forming a channel 14 is connected to the two side walls at the connection between adjacent chambers 131 .

On the cover body 2, a plurality of lock holes 21 with internal threads are respectively pierced at the grooves 1321 of each resonator 132 and each partition 133, and each lock hole 21 is internally locked with an external thread and can be adjusted as an upper 1. Adjustment elements 22 for downward displacement. The plurality of adjustment elements 22 respectively have resonance adjustment rods 221 aligned with each groove 1321 and suppression adjustment rods 222 aligned with each partition plate 133 .

Please refer to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, which are the three-dimensional appearance diagram, the three-dimensional exploded view, the three-dimensional appearance diagram of the base of another embodiment, and the base of another embodiment of the utility model. It can be clearly seen from the three-dimensional appearance diagram shown in the figure that when the above-mentioned components are assembled, the cover body 2 is covered on the top surface of the base 1, and the plurality of resonance adjustment rods 221 of the cover body 2 are respectively extended into each resonance In the groove 1321 of the body 132, the plurality of suppression adjustment rods 222 are respectively aligned with each partition plate 133; when the height of each resonance adjustment rod 221 is adjusted, the influence area between the resonance adjustment rod 221 and the bottom surface of the groove 1321 will change, When the resonance adjustment rod 221 is lowered, the amount of electromagnetic coupling gradually decreases, and when the resonance adjustment rod 221 is raised, the amount of electromagnetic coupling is gradually increased. In this way, the amount of electromagnetic coupling between the multiple resonators 132 is adjusted to achieve accurate purpose of operating within the desired operating bandwidth.

Furthermore, by adjusting each suppression adjusting rod 222 and each corresponding partition plate 133 to a predetermined distance apart, the channel 14 space for high-order harmonic transmission signals can be reduced, and the effect of suppressing high-order harmonics can be achieved (please Refer to Figure 5), since the signal will generate high-order harmonic noise during transmission, this method can filter out the noise after the signal is received, making the signal clearer and less distorted.

Please refer to Fig. 2 and shown in Fig. 4, which are the three-dimensional exploded view of the preferred embodiment of the present utility model and the three-dimensional appearance view of the base of another embodiment. It can be clearly seen from the figure that the dividing plate 133 can further The top surface is concavely provided with accommodating grooves 1331 downwards, through which the restraint adjustment rods 222 can extend into the interior, so that the base 1 can cover the lid body 2 on the upper surface and the positions of the restraint adjustment rods 222 cannot be seen. When adjusting, it can avoid the problem that each suppression adjustment rod 222 touches the corresponding partition 133 when adjusting, and the problem of being unable to filter occurs. Since it is not necessary to repeatedly adjust the positions of each suppression adjustment rod 222, the suppression adjustment rod 222 can More convenient, fast and time-saving.

Please refer to Fig. 2, Fig. 3, shown in Fig. 4, it is the three-dimensional exploded view of the preferred embodiment of the utility model, the three-dimensional appearance view of the base of another embodiment, and the three-dimensional appearance view of the base of another embodiment. It can be clearly seen that the plurality of chambers 131 of the base 1 can be circular, rectangular or polygonal, and the plurality of chambers 131 can be connected to one side or both sides of the input through groove 11, and each chamber 131 is also The resonant body 132 can be provided or not provided with the resonant body 132, the resonant body 132 is only to make the adjustment of the electromagnetic coupling more accurate and good; in addition, the output terminal 12 can also be arranged on one side wall or two sides of the base 1 The wall does not limit the patent scope of the present utility model for this reason. If other modifications and equivalent structural changes are used, they should be included in the patent scope of the present utility model in the same way.

Please refer to Fig. 1 and shown in Fig. 2, which are the three-dimensional appearance diagram, three-dimensional exploded view, another three-dimensional exploded view, side sectional view, and another side sectional view of a preferred embodiment of the present utility model, as shown in the figure It can be clearly seen that each resonance adjustment rod 221 and each suppression adjustment rod 222 of the plurality of adjustment elements 22 can have a screw head 223 extending from one end extending from the top surface of the cover body 2, or each resonance adjustment rod 221 and each suppression adjustment rod 223 can be extended. One end of the rod 222 protruding from the top surface of the cover body 2 is covered with a nut 224, which is only convenient for the user to adjust the resonances directly by hand or with a hand tool after the cover body 2 is closed on the upper surface of the base 1 Adjusting rod 221 and the function of suppressing the height of adjusting rod 222 are all that is needed, and this does not limit the patent scope of the present utility model. If other modifications and equivalent structural changes are used, they should be included in the patent scope of the present utility model in the same way. Together with Chen Ming.

The above-mentioned high-order harmonic suppression device of the cavity filter of the present invention can have the following advantages in actual use, such as:

(1) The base 1 is connected with a partition 133 above which forms a channel 14 on the two side walls of the connection between the adjacent chambers 131, and the cover 2 is provided with a plurality of suppression adjustment rods aligned with each partition 133 222. By adjusting each suppression adjusting rod 222 and the partition plate 133 to a predetermined distance, the space of the channel 14 for transmitting high-order harmonic signals can be reduced, so as to achieve the effect of suppressing noise formed by high-order harmonics.

(2) The partition plate 133 can be provided with an accommodating groove 1331 facing downwards on the top surface, so that after the upper surface of the base 1 is covered with the cover body 2, each restraining adjustment rod 222 will not touch the partition plate 133 during adjustment, To have a definite filtering effect.

Therefore, the utility model is mainly aimed at the high-order harmonic suppression device of the cavity filter, and the partition plate 133 forming the channel 14 above can be connected to the connection between the adjacent chambers 131 of the resonant space 13 on the base 1, and The cover body 2 is pierced with a plurality of suppression adjustment rods 222 aligned with the partitions 133. After each suppression adjustment rod 222 is adjusted to a predetermined distance from the partitions 133, the space available for the channel 14 to transmit high-order harmonic signals is reduced. , to suppress high-order harmonics to reduce noise, make the signal clear and undistorted as the main protection focus, however, the above is only a preferred embodiment of the utility model, and it does not limit the patent scope of the utility model Therefore, all simple modifications and equivalent structural changes made by using the contents of the specification and drawings of the utility model should be included in the patent scope of the utility model in the same way, and are hereby declared.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (5)

1. A high-order harmonic suppression device for a cavity filter, characterized in that: a base and a cover covering the base are included; wherein: The base is provided with an input through groove connecting the upper and the lower, and a plurality of output terminals are provided on the surface of the side wall of the base. Each output terminal has a metal conductor extending into the base, and a metal conductor is provided on the base. Extending into and zigzagging into the resonance space connected to the input through groove, the resonance space has a plurality of connected chambers, and the two side walls of the connection between adjacent chambers are connected with a partition forming a channel above; A plurality of lockholes with internal threads are respectively pierced on the cover to align with each chamber and each partition, and each lockhole is locked with an adjustment element with an external thread that can be adjusted for up and down displacement. The adjustment elements have resonance adjustment rods aligned with each chamber and suppression adjustment rods with alignment with each partition to reduce the signal space for high-order harmonic transmission, and each resonance adjustment rod and suppression adjustment rod are respectively connected to the bottom surface of each chamber, each There is a space between the partitions. 2. The high-order harmonic suppressing device of the cavity filter according to claim 1, characterized in that: the bottom surfaces of the plurality of chambers of the base are respectively protrudingly provided with resonators, and each resonator is concavely provided with the top surface. Groove for the resonance adjustment rod to enter. 3. The high-order harmonic suppression device for cavity filter according to claim 1, characterized in that: the partitions of the base are further recessed on the top surface to accommodate the extension of the suppression adjustment rod. groove. 4. The high-order harmonic suppression device for a cavity filter according to claim 1, characterized in that: the resonance adjustment rods and the suppression adjustment rods of the plurality of adjustment elements provided on the cover protrude from the top surface of the cover body Screw head extending from one end. 5. The high-order harmonic suppression device for a cavity filter according to claim 1, characterized in that: each resonance adjustment rod and each suppression adjustment rod of the plurality of adjustment elements provided on the cover protrude from the top surface of the cover body One end is covered with a screw cap.

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