Structure design method for power distribution circuit of wideband phase shifter

Abstract

The invention relates to a design method for a microwave radio-frequency circuit, in particular to a structure design method for a power distribution circuit of a wideband phase shifter, which can beapplied to a wideband feed network and phase shifter circuit structure design of a mobile communication antenna. The method comprises the steps of determining initial input port impedance Z_in and output port impedance Z_out_i of the power distribution circuit; performing optimization to obtain impedances Z_in_m and Z_out_m_i and electrical lengths L_in_m and L_out_m_i of an impedance conversion section in a working frequency band range, wherein Z_in_m and L_in_m are impedance and electric length of the impedance conversion section between Z_in_c and Z_in; building a corresponding three-dimensional model of a simulation result circuit in circuit simulation software in full wave simulation software, and performing parameter scanning on parameters, influencing characteristic impedance and electric length, of the three-dimensional model to obtain a corresponding three-dimensional model parameter set; taking the three-dimensional model parameter set as initial values of the three-dimensional model parameters; and performing optimization through the full wave simulation software to obtain final parameter sizes of the three-dimensional model of the power distribution circuit.

Description

technical field [0001] The invention relates to a microwave radio frequency circuit design method, in particular to a broadband phase shifter power distribution circuit structure design method applicable to the broadband feed network and phase shifter circuit structure design of mobile communication antennas. Background technique [0002] The phase shifter is the core component of the mobile communication antenna to realize the dynamic adjustment of the beam pointing in the vertical direction, and its performance largely affects key indicators such as the antenna gain, beam pointing, and upper sidelobe suppression. The design of the power distribution circuit in the phase shifter is one of the key technologies to realize the broadband of the phase shifter, which greatly affects the design efficiency of the phase shifter, the size and performance parameters of the phase shifter. [0003] In the existing phase shifter design literature, there is no detailed design method for t...

AI Technical Summary

Problems solved by technology

The design efficiency is low, and the design circuit size is often too large, which will lead to high return loss (SWR) of the phase shifter, which will affect key indicators such as antenna gain, beam pointing, and upper sidelobe suppression.

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