System for designing broadband matching network by defined impedance solving space

Abstract

The invention discloses a system for designing a broadband matching network by a defined impedance solving space, and belongs to the technical field of wireless communication, and especially designs abroadband matching network based on the defined impedance solving space. A traditional matched network design method often finds out an optimal impedance point (Ropt) of every frequency point, and makes the S parameter of the matched network approach to the optimal point; thus the design method has obvious restriction to the broadband design, in particular to a span octave. The broadband matchingdesign method defines a proper impedance solving space and is not limited in Ropt; thus when the broadband is designed, every frequency point in the broadband is corresponding to a solving space; forthe calculation method can be associated with frequency, the reasonable solution of every frequency point can be rapidly found in the whole frequency section by means of the computer software only, thus the S11 parameter of every frequency point is located at the inner part of the corresponding solving space zone; due to the expanded impedance solving space, the design difficulty of the broadbandmatching is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and particularly designs a system for designing a broadband matching network using a limited impedance solution space. Background technique [0002] The RF power amplifier is an important part of the wireless transmission system, which will directly affect the overall performance of the transmitter. The performance indicators for evaluating power amplifiers mainly include bandwidth, output power, linearity, and efficiency (divided into power-added efficiency and drain efficiency). The bandwidth is largely determined by the matching structure. A good broadband matching design method can often greatly expand the operating bandwidth of the amplifier. Broadband matching design methods widely used in the industry now mainly include Smith chart matching, real frequency technology, load pull technology (Load pull) and so on. But most of the design methods often rely on the designer's e...

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Problems solved by technology

However, this continuous design method not only needs to transform the impedance solution space from the current source plane to the packaging plane, but also it is difficult to take the impedance solution space involved in a curve as the optimization target in the specific design process, which greatly increases the difficulty of design.

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