Variable capacitance control circuit, antenna module and electronic equipment

Abstract

This application relates to a variable capacitance control circuit, antenna module and electronic equipment, including a signal transmission module, a power management module and multiple control modules. When the signal transmission module is connected to an external radio frequency front-end module, it receives and processes the output of the radio frequency front-end module RF signal, the power management module adjusts the power supply voltage according to the RF signal to obtain the adjusted voltage, each control module uses the adjusted voltage as the power supply voltage, and processes the RF signal under the control of the adjusted voltage to obtain the corresponding control voltage to adjust The capacitance value of the variable capacitor. Thus, multiple variable capacitors can be controlled through the signal transmission module, power management module and multiple control modules, and each control module can independently control the variable capacitors of each channel to adjust the capacitance value; at the same time, the control voltage of each control module The range can be adjusted multiple times to increase the capacitance range of the variable capacitor.

Description

technical field [0001] The present application relates to the technical field of antennas, in particular to a variable capacitance control circuit, an antenna module and electronic equipment. Background technique [0002] With the continuous development of the mobile phone market, full-screen mobile phones have become a trend. More and more users not only pursue large screens of mobile phones, but also begin to pursue smaller screen occlusions, that is, high screen-to-body ratio. When designing a mobile phone with a high screen-to-body ratio, the space of the antenna clearance area is constantly compressed. In order to ensure the performance of the antenna, mobile phone manufacturers generally use variable capacitors for antenna impedance tuning and antenna resonance tuning. [0003] However, in the current mobile phone antenna module, generally only one variable capacitor can be independently controlled to work, and the variable capacitor has a small capacitance range, whic...

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Problems solved by technology

[0003] However, in the current mobile phone antenna module, generally only one variable capacitor can be independently controlled to work, and the variable capacitor has a problem of small capacitance range, which limits the use of the antenna

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