A te01 mode dielectric filter

Abstract

A TE01 mode dielectric filter comprises a cavity, a cover plate, dielectric resonators, T-shaped coupling rods, tuning screws, SMA electric connectors and fastening screws. The TE01 mode dielectric filter is characterized in that cross couplings of the filter are all positive, and a main coupling is provided with two negative couplings positioned between the dielectric resonators R1 and R2 and between the dielectric resonators R6 and R7 respectively by the aid of the novel T-shaped coupling rods. Due to the fact that all cross couplings of the filter are positive and implemented through coupling holes, compared with a traditional dielectric filter with negative cross couplings implemented through probes, the TE01 mode dielectric filter has the advantages that introduced parasitic couplings are small, introducing redundant cross couplings for overcoming influences of the parasitic couplings is not needed, and reliability of the filter is improved. In addition, the novel T-shaped coupling rods are low in chromatic dispersion and simple in processing, fine tuning of coupling can be realized by the aid of the tuning screws, repeatedly demounting the cover for altering the sizes of the coupling rods during debugging of the filter is avoided, and accordingly debugging workload is reduced.

Description

technical field [0001] The invention relates to a TE01 mode dielectric filter, which belongs to the field of microwave passive components. Background technique [0002] Compared with the traditional thin-wall Invar circular cavity dual-mode input multiplexer, the medium input multiplexer has small size, light weight, excellent performance, and small frequency temperature coefficient, and has been widely used at home and abroad. At present, most of the dielectric input multiplexers from the L-band to the Ka-band use TE01-mode dielectric filters. The channel filters that make up the dielectric input multiplexer are usually high-order narrow-band filters, and the most commonly used is the tenth-order self-equalizing TE01 mode dielectric filter. [0003] Searched domestic and international related articles and patents. There is a domestic patent on the tenth-order TE01 mode dielectric filter, patent number ZL201110181357.0. There are still many articles or patents introducing T...

AI Technical Summary

Problems solved by technology

The disadvantage of the former is that the double-layer negative coupling probe is complex to operate, sensitive to length, and difficult to calculate accurately. It is necessary to repeatedly open the cover to modify the length of the probe, and the debugging is complicated. The product structure is complex and the reliability is reduced

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