Cavity bandstop filter and RF device
A band-stop filter, cavity-type technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of inapplicability, single structure design, long total length of the band-stop filter, etc., to improve flexibility, The effect of shortening the length
Active Publication Date: 2019-12-17
COMBA TELECOM TECH (GUANGZHOU) CO LTD
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Problems solved by technology
In order to meet the needs of signal processing, in the past, the band-stop filter arranged on one side of the parallel resonator, the distance of the main channel feeder between the two parallel resonators is usually 1 / 4 wavelength or 1 / 8 wavelength, this design will cause band-stop filtering The total length of the device is too long, and the structural design style is single, which is not applicable in the scene with limited size
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[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0022] like figure 1 As shown, the present invention provides a cavity-type band-rejection filter 100 (hereinafter referred to as "band-rejection filter"), which includes a cavity 101 connected to the input of both sides of the cavity 101 (such as both ends in the longitudinal direction). The terminal connector 102 and the output terminal connector 103 are p...
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Disclosed in the present invention is a cavity type band-stop filter, comprising a cavity, a cover plate coving the top surface of the cavity, and an input end connector and an output end connector connected to two ends of the cavity in a lengthwise direction. The cavity is provided therein with: a main path feeder connected between the input end connector and the output end connector, and a main path feeder chamber accommodating the main path feeder; a plurality of parallel resonators distributed at two sides of the main path feeder chamber, each of the parallel resonators comprising a resonant cavity and a resonant column placed in the resonant cavity, and the resonant column extending from the bottom wall of the resonant cavity towards the cover plate; and a plurality of coupling branches connected to the main path feeder and coupled in one-to-one correspondence to the plurality of parallel resonators. The cavity type band-stop filter provided by the present invention can not only ensure the processing precision and no-load Q value of the parallel resonators, but also greatly reduce the length of the band-stop filter, and therefore, the related device has a proper length, low costs, and a wide application range.
Description
technical field [0001] The invention relates to the technical field of communication devices, in particular to a cavity-type band-stop filter and a radio frequency device using the cavity-type band-stop filter. Background technique [0002] In modern mobile communication technology, microwave devices composed of band-stop filters have become an indispensable and important part. With the continuous development of the electronic information industry, higher and higher requirements are put forward for the stop band bandwidth, insertion loss, power capacity, device size and cost of the band stop filter. [0003] At present, the high-performance band rejection filter usually adopts the main channel feeder plus parallel resonators. When the stop band requires strong suppression, more parallel resonators need to be used. In order to meet the needs of signal processing, in the past, the band stop filter arranged on one side of the parallel resonator, the distance of the main channe...
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IPC IPC(8): H01P1/207H01P1/208
CPCH01P1/207H01P1/208
Inventor 谢振雄郭春波邸英杰黄友胜靳雲玺
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD