Cavity radio frequency apparatus with capacitive cross coupling device

Abstract

The invention mainly discloses a cavity radio frequency apparatus with a capacitive cross coupling device, comprising at least two linearly arranged resonant cavities arranged in a cavity; a longitudinal channel for communicating the two resonant cavities is arranged between the two resonant cavities; the capacitive cross coupling device comprises at least one conductor arranged along the longitudinal direction of the channel; the conductor is insulated with the side wall of the channel at any position, is in on-site connection with the bottom of the cavity and is provided with a part extending out of the cavity for adjusting the coupling term. Compared with the prior art, the invention at least has the following advantages that the capacitive cross coupling device is convenient for the linear arrangement between the resonant cavities so that the cavity space is fully used, the Q value of the resonant cavities becomes large but the volume, the weight and the cost of the apparatus are reduced; the inhibition of the downlink frequency band to the uplink frequency band can be increased, the capacitive cross coupling device can be adjusted randomly, the times for disassembling a cover board due to adjusting the length of a flying bar in the traditional technology are reduced, the operation is flexible, simple and convenient, and the debugging efficiency is greatly improved.

Description

【Technical field】 [0001] The invention relates to a cavity radio frequency device, including a filter, a duplexer, a combiner and the like, in particular to a cavity radio frequency device with a capacitive cross-coupling device. 【technical background】 [0002] With the development of highly integrated and miniaturized communication systems, operators and equipment manufacturers have put forward higher requirements for system modules in terms of performance and cost. [0003] Cavity RF devices such as filters, duplexers, and combiners play an important role in communication systems. In order to prevent signal interference between communication systems, system operators have higher and higher requirements for out-of-band suppression of filters. . [0004] In the path of the cavity radio frequency device, in order to meet the requirement of the downlink frequency band to suppress the uplink frequency band, it is generally realized by adding a capacitive cross-coupling device ...

AI Technical Summary

Problems solved by technology

[0005] First of all, this cross-coupling way to arrange the resonant cavity needs to occupy a large volume, and the space utilization rate is low, which is not conducive to the development of device miniaturization, such as figure 1 The middle resonant cavity 12 must be biased outward relative to the resonant cavities 11 and 13, resulting in a larger volume of the entire cavity 1;

[0006] Secondly, in the debugging process, if you want to change the coupling amount, you must remove the cover to adjust the length of the metal flying rod, which has a great impact on the debugging efficiency;

[0007] Furthermore, in the application, if a strong capacitive coupling is required, the length of the metal fly rod needs to be lengthened, and lengthening the metal fly rod will shorten the distance between the metal fly rod and the resonant column, which may cause high-power signals to pass through When the device will be ignited and burned out

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