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Method for providing ability of tuning resonance frequency for different applications

A technology of resonant frequency and ability, applied in the field of ability to provide tuning resonant frequency, can solve the problems of low center frequency, small tuning range, limiting the development of filters and duplexers/multiplexers, etc., to improve size and cost, Effects at no cost

Inactive Publication Date: 2009-06-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, its tuning range is small and cannot meet the needs of more applications. For example, this method cannot obtain the 60MHz bandwidth required by Wideband Code Division Multiple Access (WCDMA) systems
Secondly, the center frequency is not high, which is not conducive to the development of resonators
All these shortcomings limit the development of filters and duplexers / multiplexers

Method used

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  • Method for providing ability of tuning resonance frequency for different applications
  • Method for providing ability of tuning resonance frequency for different applications
  • Method for providing ability of tuning resonance frequency for different applications

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Embodiment Construction

[0021] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, to avoid obscuring the clarity of the invention in unnecessary detail, some well-known functions or constructions are not described in detail.

[0022] The idea of ​​the invention is to add a ferroelectric disk in the resonator. Since the dielectric constant of a ferroelectric disk changes as a function of an applied direct current (DC) electric field and temperature, the dielectric constant is not a fixed value but can vary according to the surrounding environment. Therefore, the resonant frequency can also change, which makes the center frequency of the filter, duplexer / multiplexer change. At the same time, a larger tuning range can be obtained.

[0023] Refer to where the general flow chart is shown image 3 , and taking a quadrupole filter composed of two cylindrical metal cavities loaded with two supported dielectric r...

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Abstract

The present invention discloses a method of providing the ability to tune the resonant frequency in different applications. The method according to the present invention at least includes: adding a ferroelectric disk in a dielectric resonator; here, the ferroelectric disk has a relative permittivity that changes with changes in the surrounding environment; forming a notch on the dielectric resonator to couple Two polarization states for each mode excited on a dielectric resonator. In the present invention, since the resonance frequency can be changed according to the surrounding environment, the tuning range of the filter and duplexer / multiplexer having a resonator with a ferroelectric disk is large. In addition, according to the present invention, the resonance frequency can be changed in a high-frequency environment. Thus, the invention can be used to improve the size and cost of filters and duplexers / multiplexers in different applications, especially in low noise environments.

Description

technical field [0001] The present invention relates generally to frequency tuning techniques, and more particularly to a method of providing the ability to tune resonant frequencies in various applications. Background technique [0002] Currently, resonators are widely used in filters and duplexers / multiplexers, especially filters. A good filter has three desirable characteristics, low insertion loss, high return loss, and high rejection band. For example, a high-quality filter can improve the channel quality by 3dB, which will double the data transmission speed than the original transmission speed. For service providers, this will increase the size of the "sweet spots" where users can enjoy the highest speed connections, and will increase the average rate at which data travels across the network. [0003] Various technologies such as cavity resonators, multi-coupled cavities, and dielectric resonators are now used to achieve low insertion loss, and multimode resonators a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P7/06H01P1/208
CPCH01P1/2084
Inventor 法尔哈特·阿巴斯艾里瑞泽·内贾蒂安
Owner HUAWEI TECH CO LTD