A te01-mode dielectric filter that is easy to process and debug

Abstract

Disclosed is an easily machined and debugged TE01 mode dielectric filter. The dielectric filter comprises a cavity, a cover plate, dielectric resonators, transverse rod screw coupling mechanisms, a tuning screw and an SMA electric connector. The filter is characterized in that the filter crossed coupling is all positive, and the two transverse rod screw coupling mechanisms are on main coupling torealize negative coupling, and are positioned between dielectric resonators R4 and R5, and R9 and R10; compared with the prior art, the positions can be changed; the filter has no negative crossed coupling as a probe structure, so that spurious coupling is quite low; holes of the transverse rod screw coupling mechanisms are common through holes, and machined by a milling cutter, so that the machining process is simple; the filter has wide relative bandwidth which is two times of that of the common filter; the screws of the transverse rod screw coupling mechanisms can continuously adjust coupling quantity, so that continuous adjustability of the coupling quantity can be realized, without detaching the cover plate, and simple debugging is realized; and the transverse rod screw coupling mechanisms of the filter have no small spacing, so that high product reliability is achieved.

Description

technical field [0001] The invention relates to a TE01 mode dielectric filter which is easy to process and debug, and 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, TE01-mode dielectric filters can be used for dielectric input multiplexers from the L-band to the Ka-band. The channel filters that make up the dielectric input multiplexer are usually high-order narrow-band filters, that is, tenth-order self-equalizing TE01-mode dielectric filters. filter. [0003] Searched domestic and international related articles and patents. There is a domestic patent on the tenth-order TE01 mode dielectric filter, the patent number is ZL201110181357.0, such as Figure 11 shown. The...

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Problems solved by technology

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

like Figure 12 As shown in the domestic patent CN104218281B, the T-shaped coupling rod is used to reduce the number of times of removing the cover plate, but the continuously adjustable coupling amount cannot be achieved. The coupling hole for installing the T-shaped coupling rod needs to be processed by EDM, and the T-shaped coupling rod is filtered When the bandwidth of the device is narrow, there is a small gap, which affects reliability

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