Variable capacitance control circuit, antenna module and electronic equipment

Abstract

The invention relates to a variable capacitance control circuit, an antenna module and electronic equipment. The variable capacitance control circuit comprises a signal transmission module, a power management module and a plurality of control modules, when the signal transmission module is connected with an external radio frequency front-end module, a radio frequency signal output by the radio frequency front-end module is received and processed; and the power supply management module performs voltage regulation processing on the power supply voltage according to the radio frequency signal toobtain an adjustment voltage, each control module takes the adjustment voltage as a power supply voltage, and the radio frequency signal is processed under the control of the adjustment voltage to obtain a corresponding control voltage so as to adjust the capacitance value of the variable capacitor. Therefore, the plurality of variable capacitors can be controlled through the signal transmission module, the power management module and the plurality of control modules, and each control module can independently control the variable capacitor of each channel to adjust the capacitance value; and meanwhile, the control voltage range of each control module can be adjusted for multiple times, so that the capacitance range of the variable capacitor is increased.

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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