Radio frequency matching circuit, and method for debugging radio frequency matching circuit

Abstract

The invention provides a radio frequency matching circuit and a method for debugging the radio frequency matching circuit. The radio frequency matching circuit includes more than two sub radio frequency matching circuits, one end of each sub radio frequency matching circuit is connected with a sub signal output end, and the other end is connected with an input end of an antenna; and a signal output by each of the sub signal output ends has a different frequency range. Thus signals output by an output end of a radio frequency converter are output through more than two sub signal output ends according to difference of the frequency ranges, then impedance in the corresponding frequency range is debugged through the sub radio frequency matching circuit connected with the sub signal output end, so that a radio frequency engineer can perform matching debugging in a relatively small frequency range, the debugging difficulty is lowered, the degree of convergence of a Smith chart is improved, the reflection power is reduced, and a debugging effect is improved, thereby improving the radio frequency performance of a mobile terminal.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a radio frequency matching circuit and a debugging method for the radio frequency matching circuit. Background technique [0002] The antenna is made of metal wires, metal surfaces or other dielectric materials to form a certain shape, erected in a certain space, and converts the radio frequency power fed from the transmitter into electromagnetic wave energy radiated into space, or converts the electromagnetic wave energy propagated in space into radio frequency power and delivered to the receiver device. [0003] There are many types of antennas. In wireless terminals, especially miniaturized wireless terminals, patch antennas or PF antennas are generally used. [0004] In order to improve the performance of radio frequency antennas, in recent years, a series of researches on radio frequency circuits have been carried out at home and abroad, and many research results have...

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Problems solved by technology

[0008] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a radio frequency matching circuit and a debugging method for the radio frequency matching circuit, which are used to solve the problem that the impedance matching diagram of the debugging does not converge when debugging the radio frequency impedance matching in the prior art. , the reflection of radio frequency signal increases at some frequency points, and the problem of large loss of radio frequency signal

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