Antenna matching circuit and electronic device

Abstract

The invention discloses an antenna matching circuit and an electronic device, wherein the antenna matching circuit comprises inductors and a capacitor assembly. A fixed pole plate and a movable pole plate of the capacitor assembly are arranged in opposite. One end of the fixed pole plate is vertically fixed on a fixed rod. One end of the movable pole plate is vertically arranged on a movable rod. The fixed rod and the movable rod are connected through a spring, so that the distance between the fixed rod and the movable rod is adjusted through the spring, and the opposite area between the fixed pole plate and the movable pole plate is adjusted. By adopting the above mode, the capacitance can be dynamically adjusted, so that an antenna is enabled to select different matching capacitance values according to different communication frequency bands in the communication process of the electronic device, and the performance of the antenna reaches an optimal state.

Description

technical field [0001] The invention relates to the technical field of wireless mobile communication, in particular to an antenna matching circuit and electronic equipment. Background technique [0002] The current electronic devices (such as smart phones) are getting thinner and more integrated devices and functions. Many devices start to use metal casings, leaving less and less effective space for antennas, and the requirements for antenna performance are also increasing. Higher and higher, the impedance matching of the antenna directly affects the performance of the antenna. Such as figure 1 As shown, the existing mobile phone antenna includes a mobile phone baseband 11, a radio frequency transceiver 12, a radio frequency front end 13, a fixed matching circuit 14 and an antenna 15. The transceiver 12 converts the high-frequency signal, and then sends it to the fixed matching circuit 14 via the radio frequency front end 13 of the mobile phone. The fixed matching circuit ...

AI Technical Summary

Problems solved by technology

[0003] As the fourth generation of mobile communication LTE (English: LongTermEvolution; Chinese: Long Term Evolution of Universal Mobile Communication Technology) is more and more widely used, there are more and more LTE frequency bands. At present, the mobile phone communication frequency band covers 698MHZ ~ 2690MHZ, The bandwidth reaches 3GHZ. In the prior art, the impedance matching on a certain frequency band is carried out using the Smith chart tool, that is, the impedance matching from any point on the chart to another point can be realized through series and parallel inductors or capacitors, but this is only for Single-band, while mobile phone antennas are multi-band, matching one of the frequency bands will inevitably affect the other frequency bands, thus affecting the overall performance of the antenna

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