A design method for antenna impedance matching circuit

A technology of impedance matching circuit and matching circuit, applied in the direction of antenna, impedance network, electrical components, etc., can solve the problem of increasing design cost
CN1523774AInactive Publication Date: 2004-08-25BENQ CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BENQ CORP
Publication Date
2004-08-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a method for designing antenna impedance match circuit used in matching power amplifier and an antenna circuit initially including an antenna and a first antenna impedance match circuit. A second circuit is provided to be matched with that of the first power amplifier to constitute an integral circuit which impedance forms a first trace on the smith chart and its phase error is regulated. In addition, a second power amplifier impedance match circuit is designed to be matched with the first antenna circuit to make up of another integral circuit and the impedance forms a second trace on the smith chart and the system gets the phase error in conformity with the predesigned specifications when the two overlapped.
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Description

technical field

[0001] The invention relates to a method for designing an impedance matching circuit, in particular to a method for matching a power amplifier and an antenna circuit into a circuit whose phase error meets specifications. Background technique

[0002] When designing a wireless receiving / transmitting circuit of a wireless communication device, it is necessary to design an antenna impedance matching circuit for matching antenna impedance and a power amplifier impedance matching circuit for adjusting power amplifier impedance. Generally, when adjusting the matching of the antenna circuit, because the power amplifier and other circuits at the back end of the impedance matching circuit of the power amplifier are more complicated, there are many problems involved, so in the design, the impedance matching circuit of the power amplifier will not be changed when adjusting the impedance. , but by means of the adjustment of the antenna impedance matching circuit to achie...

Claims

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