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Adjustable filter and duplexer comprising same

A filter and tuning screw technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problems of difficult platformization and small tuning range of adjustable filters, so as to realize platformization, save management and manufacturing costs Effect

Active Publication Date: 2012-09-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a tunable filter, which aims to solve the problem that the traditional tunable filter has a small tuning range and is difficult to achieve platformization

Method used

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  • Adjustable filter and duplexer comprising same
  • Adjustable filter and duplexer comprising same
  • Adjustable filter and duplexer comprising same

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] Figure 4 A schematic diagram of a single-cavity structure of a tunable filter provided by an embodiment of the present invention is shown, Figure 5 It shows a schematic diagram of the single-cavity working state of the tunable filter provided by the embodiment of the present invention, Image 6 A schematic diagram of test data of the tunable filter provided by the embodiment of the present invention is shown, and for convenience of description, only the part related to this embodiment is shown.

[0029] like Figure 4 , the tunable filter includes a plurality of resonant cavities 1, eac...

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Abstract

The invention is suitable for the field of communication devices and provides an adjustable filter and a duplexer comprising the same. The filter comprises a plurality of resonant cavities, a resonant tube and a tuning screw penetrating in a space defined by the resonant tube are arranged in each resonant cavity, the filter further comprises tuning members arranged between the tuning screws and the resonant tubes, a first capacitor is formed by the tuning members and the resonant tubes, and a second capacitor is formed by the tuning members and the tuning screws. The filter further comprises an adjusting structure for turning the tuning members to change relative area among the tuning members, the resonant tubes and the tuning screws so as to enable the first capacitor and the second capacitor to generate linkage change. According to the filter, the tuning members are arranged between the tuning screws and the resonant tubes, a double-capacitor structure is formed by the tuning members, the resonant tubes and the tuning screws, the double-capacitor linkage change can be achieved by turning the tuning members so as to enable an adjustable range of the filter to be wider than a traditional frequency modulation range, and adjustable broad band of the filter is achieved. Therefore, platformization of the duplexer is achieved, and management and manufacturing cost is saved substantially.

Description

technical field [0001] The invention belongs to the field of communication devices, in particular to an adjustable filter and a duplexer including the filter. Background technique [0002] The duplexer of the base station transceiver module is composed of an RF (radio frequency) cavity filter, which is generally located on the structural part on the back of the transceiver single board, and is used for single-channel high-power signal transmission. The RF cavity in the duplexer Volume filters include TX filter (transmit channel filter) and RX filter (receive channel filter). With the development of multi-carrier and multi-mode mobile communications, the demand for platformization is intensifying. For example, DCS (Decentralized Control System), PCS (Personal Communications Services), TD-SCDMA (Time Division Synchronous Code Division Multiple Access), and UMTS (Universal Mobile Telecommunications System) have a frequency range of 1710-2170MHz, which requires a large number o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/208
CPCH01P1/2053H01P1/205H01P1/208
Inventor 周彦昭
Owner HUAWEI TECH CO LTD
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