Adaptive impedance matching device, communication system and impedance matching method

Abstract

The invention relates to the technical field of impedance matching, and provides a self-adaptive impedance matching device, a communication system and an impedance matching method. The self-adaptive impedance matching device comprises a control module, a storage module and a controllable impedance matching module. When a radio frequency transmit-receive module transmits or receives a radio frequency signal, the control module acquires an impedance value matching a frequency value of the radio frequency signal from the storage module so that the impedance value of the controllable impedance matching module is matched with the frequency value of the currently transmitted or received radio frequency signal. Impedance data stored in the storage module are read according to the frequency value of the signal transmitted or received by the radio frequency transmit-receive module and matching is performed so that self-adaptive impedance matching is realized. As for multi-band radio frequency communication systems working at different time, one self-adaptive impedance matching module can also be shared so that a problem of mismatch between certain frequency of the radio frequency signal and impedance in a radio frequency channel in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of impedance matching, in particular to an adaptive impedance matching device, a communication system and an impedance matching method. Background technique [0002] The RF channel of the communication system needs to match the frequency and impedance of the signal to achieve the maximum power transmission and ensure the best performance. At present, the matching of the RF channel usually uses discrete components C, L, and R to form π-type, L-type and T Type impedance matching network, different frequency band channels need to set up different impedance matching networks. The communication system in the prior art supports multiple networks and multiple frequency bands, for example, frequency bands such as WCDMA B1, CDMA2000 BC0, LTE B39, LTE B7, and GSM1900. Most of the RF ports of RF devices have a characteristic impedance of 50 ohms. After a long trace, it is usually necessary to add an impedance matching...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an adaptive impedance matching device, a communication system and an impedance matching method, aiming to solve the problem of mismatching between certain frequencies and impedances of radio frequency signals in the radio frequency channel in the prior art

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