Method and device for dynamic tuning of mobile phone and its built-in antenna of TV

Abstract

The invention relates to a mobile phone, and a method and a device for dynamically tuning a television internal antenna thereof. The method for dynamically tuning the television internal antenna of the mobile phone comprises the following steps that: a mobile phone baseband circuit receives a frequency band selection signal and a frequency channel selection signal, controls a television receiving chip to be tuned to the selected frequency band and frequency channel, connects the internal antenna to a corresponding tuning network of a plurality of tuning networks in an electronic tuning circuit through the frequency band selection switch based on the selected frequency band so as to set the electronic tuning circuit in the selected frequency band, and regulates the electronic tuning circuit based on the selected frequency channel to make the electronic tuning circuit reach the tuning point of the selected frequency channel. In the invention, an optimal receiving frequency point can be dynamically changed to be synchronous with a television channel to be watched so as to realize the dynamical tuning matching with an optimal sensitivity and improve the receiving sensitivity of an antenna system. Moreover, the invention has the advantages of stable performance, low cost and small volume.

Description

technical field [0001] The present invention relates to communication equipment, more specifically, to a dynamic tuning method and device for a television built-in antenna of a television receiver built in a portable communication equipment. Background technique [0002] With the development of communication networks and continuous expansion of services, mobile communication terminal devices such as mobile phones have become necessities for people's daily work and life. Users also have more and more functional requirements for mobile phones. For example, many users want their mobile phones to be equipped with TV functions so that they can watch programs they are interested in in their spare time. As a result, mobile phone manufacturers have developed mobile phones with TV functions. At present, the antennas of mobile TV can be divided into two types: built-in antennas and external antennas. [0003] The receiving frequency range of mobile TV is from 150MHz-870MHz. In order...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The size is large. In order to achieve sufficient bandwidth, the length of the antenna will exceed 30cm when all the antennas are pulled out, which is inconvenient to carry

2. It cannot be made into a built-in antenna, which will affect the appearance of the product

3. Due to the contact of human hands during manual tuning, the tuning accuracy is affected

And the closer to the edge of the passband, the lower the receiver sensitivity

Therefore, the existing built-in antenna technology has the problem of different receiving sensitivities at different frequencies caused by the narrowing of the built-in antenna bandwidth

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