Device and method for implementing DVB-H antenna matching network for mobile telephone

Abstract

The invention discloses a device and a method thereof for realizing a matching network of a DVB-H antenna of a cell phone, which are used in a DVB-H antenna system of a DVB-H handheld device. The invention is characterized in that: the method comprises the following steps: step 1. an interface of the antenna system is connected with an input end of a radio frequency switch; an output end of the radio frequency switch is respectively connected with N branches, and the number of the branches is a natural number; step 2. a corresponding matching antenna is set for each branch; each matching antenna is regulated to a corresponding equivalent matching circuit through topology optimization of the matching circuit according to the working condition of the antenna system, and then each branch is connected with a feeding port of the antenna in the antenna system. Compared with a proposal of a parallel matching circuit selected by the former switch, the invention removes a radio frequency switch 2 and selects matching of each branch in on state, thus solving the problem of non-ideal work of the radio frequency switch 2 in the former proposal and saving device cost consequently.

Description

technical field [0001] The invention relates to a mobile phone DVB-H antenna, in particular to a device and method for realizing a matching network of the DVB-H antenna in the communication field. Background technique [0002] In 1993, the DVB (Digital Video Broadcast, digital television broadcasting) project began to develop digital video broadcasting specifications, and was later developed by the international standard organization ETSI (European Telecommunication Standards Institute, European Telecommunications Standards Institute) and CENELEC (European Committee for Electrotechnical Normalization , European Committee for Electrotechnical Standardization) to form an international standard. DVB main standards include: satellite digital television transmission system DVB-S, terrestrial digital television transmission system DVB-T, cable digital television transmission system DVB-C. In November 1994, ETSI officially adopted the DVB-H standard (developed on the basis of DVB-...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this solution is: in actual work, the RF switch 2 connected to the antenna does not work ideally, the input and output of the switch do not match (deviating from 50 ohms), and the isolation of each input port is not enough

[0008] The disadvantage of this solution is: in the electric adjustment device, the varactor is easy to realize by changing the DC (Direct Current, direct current) bias, but the electrically adjustable inductor, especially the small electric adjustable inductor, is difficult to realize

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