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Adjustable filter and duplexer comprising same

A filter and tuning screw technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of difficulty in platformization and small tuning range of tunable filters, so as to achieve platformization and save management and manufacturing costs. Effect

Active Publication Date: 2014-07-09
HUAWEI TECH CO LTD
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  • 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 objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but 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 A schematic diagram of the single-cavity working state of the tunable filter provided by the embodiment of the present invention is shown, Image 6 A schematic diagram of test data of the tunable filter provided by the embodiment of the present invention is shown. 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...

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Abstract

The invention is applicable to the field of communication devices, and provides an adjustable filter and a duplexer including the filter. The filter includes a plurality of resonant cavities, and each resonant cavity is provided with a resonant tube and a penetrating resonant tube The tuning screw in the enclosed space; it also includes a tuning piece arranged between the tuning screw and the resonant tube, the tuning piece and the resonant tube form a first capacitor, and the tuning screw forms a second capacitor; and a tuning piece for rotating the tuning piece The structure is adjusted to change the relative area between the tuning member, the resonant tube and the tuning screw, so that the first capacitance and the second capacitance change in linkage. In the present invention, a tuning piece is arranged between the tuning screw and the resonant tube, so that the tuning piece, the resonant tube and the tuning screw form a dual capacitor structure, and the double capacitor linkage change can be realized by rotating the tuning piece, so that the adjustable range of the filter is more than the traditional one. The frequency modulation range is larger, and the broadband adjustable filter is realized, thereby realizing the platformization of the duplexer, which greatly saves management and manufacturing costs.

Description

technical field [0001] The invention belongs to the field of communication devices, and in particular relates to a tunable filter and a duplexer including the filter. Background technique [0002] The duplexer of the transceiver module of the base station is composed of an RF (radio frequency) cavity filter, which is generally located on the structural member on the back of the transceiver 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-standard mobile communication, the demand for platformization is becoming more and more intense. For example, DCS (Decentralized Control System), PCS (Personal Communication Service), TD-SCDMA (Time Division Synchronous Code Division Multiple Access), UMTS (Universal Mobile Telecommunications System) have frequency bands ranging from 1710-2170MHz,...

Claims

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Application Information

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