CN-119833912-B - Broadband low-loss phase shifter based on hybrid quadrature generator structure

CN119833912BCN 119833912 BCN119833912 BCN 119833912BCN-119833912-B

Abstract

The invention provides a broadband low-loss phase shifter based on a hybrid quadrature generator structure, and relates to the technical field of phase shifters. The output end of the 1-order II-type PPF quadrature generator of the phase shifter is connected with the input end of the 2-order Hybrid quadrature generator, the output end of the 2-order Hybrid quadrature generator is connected with the input end of the digital control vector synthesis adder, the first differential signals input by the Hybrid quadrature generator can compensate amplitude characteristics of the 2-order Hybrid quadrature generator through the 1-order II-type PPF quadrature generator so as to output ultra-wideband and amplitude-phase balanced quadrature signals, the digital control vector synthesis adder can carry out vector synthesis on the input quadrature signals, and each path of second differential signals is an equal-amplitude signal with a phase difference of 180 degrees. The generator can effectively reduce the insertion loss of the phase shifter, so that the output signal of the phase shifter has the advantages of ultra-wideband, high precision and low error.

Inventors

LIU ZHIZHE
CHENG SHUAI
CAO YUXIONG
CHEN LINHUI
DU JINGCHAO
HONG XIANG
LI ANAN
ZHONG ZHIYONG
TIAN FAN

Assignees

北京遥感设备研究所

Dates

Publication Date: 20260508
Application Date: 20241230

Claims (5)

1. A broadband low-loss phase shifter based on a hybrid quadrature generator structure is characterized by comprising a one-to-two power divider, a hybrid quadrature generator, a digital control vector synthesis adder and a two-to-one power combiner which are connected in sequence; The mixed orthogonal generator is formed by matching a 1-order II-type PPF orthogonal generator and a 2-order Hybrid orthogonal generator, the input end of the 1-order II-type PPF orthogonal generator is connected with the one-to-two power divider, the output end of the 1-order II-type PPF orthogonal generator is connected with the input end of the 2-order Hybrid orthogonal generator, and the output end of the 2-order Hybrid orthogonal generator is connected with the input end of the digital control vector synthesis adder; the one-to-two power divider can convert an input single-ended signal into a first differential signal; The first differential signal input by the Hybrid quadrature generator can perform amplitude compensation on the 2-order Hybrid quadrature generator through the 1-order II-type PPF quadrature generator to output a quadrature signal; The digital control vector synthesis adder can input the orthogonal signals to output second differential signals, and each path of the second differential signals is a constant-amplitude signal with a specific phase difference; the 1-order II-type PPF quadrature generator is formed by connecting a plurality of resistance-capacitance units in parallel, wherein the resistance-capacitance units are formed by connecting a first resistor and a first capacitor in parallel; The two adjacent resistance-capacitance units can input one path of the first differential signals to output two paths of equal-amplitude orthogonal signals with the phase difference of 90 degrees, and the other path of the first differential signals to output two paths of equal-amplitude orthogonal signals with the phase difference of 90 degrees; The 2-order Hybrid quadrature generator comprises two stages of Hybrid quadrature generators which are arranged in a cascading manner, each stage of the Hybrid quadrature generator comprises four groups of Hybrid coupler unit structures which are arranged in parallel, the four groups of Hybrid coupler unit structures can respectively input the equal-amplitude quadrature signals to output four groups of quadrature signals, and four ultra-wideband equal-amplitude quadrature signals with 90 DEG phase difference can be output according to the four groups of quadrature signals; The Hybrid coupler unit structure consists of a first inductor, a second capacitor and a third capacitor, wherein the first inductor is coupled with the second inductor, the second capacitor is arranged between the positive end of the first inductor and the negative end of the second inductor or between the negative end of the first inductor and the positive end of the second inductor, and the third capacitor is arranged between the negative end of the first inductor and the positive end of the second inductor or between the positive end of the first inductor and the negative end of the second inductor; The four resistance capacitance units are distinguished as a first resistance capacitance unit, a second resistance capacitance unit, a third resistance capacitance unit and a fourth resistance capacitance unit, and four groups of the Hybrid coupler unit structures of the Hybrid quadrature generator are distinguished as a first Hybrid coupler unit structure, a second Hybrid coupler unit structure, a third Hybrid coupler unit structure and a fourth Hybrid coupler unit structure; the first resistance capacitance unit is connected with the second Hybrid coupler unit structure, the second resistance capacitance unit is connected with the first Hybrid coupler unit structure, the third resistance capacitance unit is connected with the fourth Hybrid coupler unit structure, and the fourth resistance capacitance unit is connected with the third Hybrid coupler unit structure.
2. The broadband low-loss phase shifter based on a Hybrid quadrature generator structure of claim 1, wherein four sets of said Hybrid coupler cell structures of a secondary said Hybrid quadrature generator are distinguished by a fifth Hybrid coupler cell structure, a sixth Hybrid coupler cell structure, a seventh Hybrid coupler cell structure, and an eighth Hybrid coupler cell structure; the first Hybrid coupler unit structure is respectively connected with the fifth Hybrid coupler unit structure and the eighth Hybrid coupler unit structure; the second Hybrid coupler unit structure is respectively connected with the sixth Hybrid coupler unit structure and the fifth Hybrid coupler unit structure; The third Hybrid coupler unit structure is respectively connected with the sixth Hybrid coupler unit structure and the seventh Hybrid coupler unit structure; The fourth Hybrid coupler unit structure is connected with the eighth Hybrid coupler unit structure and the seventh Hybrid coupler unit structure respectively.
3. The broadband low-loss phase shifter based on the Hybrid quadrature generator structure according to claim 2, wherein the fifth Hybrid coupler unit structure is capable of outputting a first ultra-wideband equal-amplitude quadrature signal with a phase of 90 ° and a first ultra-wideband equal-amplitude quadrature signal with a phase of 180 °, the sixth Hybrid coupler unit structure is capable of outputting a first ultra-wideband equal-amplitude quadrature signal with a phase of 0 ° and a second ultra-wideband equal-amplitude quadrature signal with a phase of 90 °, the seventh Hybrid coupler unit structure is capable of outputting a second ultra-wideband equal-amplitude quadrature signal with a phase of 0 ° and a first ultra-wideband equal-amplitude quadrature signal with a phase of 270 °, and the eighth Hybrid coupler unit structure is capable of outputting a second ultra-wideband equal-amplitude quadrature signal with a phase of 180 ° and a second ultra-wideband equal-amplitude quadrature signal with a phase of 270 °.
4. The wideband low-loss phase shifter based on the hybrid quadrature generator structure of claim 3, wherein the first ultra-wideband constant-amplitude quadrature signal with a phase of 0 ° and the second ultra-wideband constant-amplitude quadrature signal with a phase of 0 ° are combined and output to the digitally controlled vector synthesis adder; combining and outputting the first ultra-wideband equal-amplitude orthogonal signal with the phase of 90 degrees and the second ultra-wideband equal-amplitude orthogonal signal with the phase of 90 degrees to the digital control vector synthesis adder; combining and outputting the first ultra-wideband equal-amplitude orthogonal signal with the phase of 180 degrees and the second ultra-wideband equal-amplitude orthogonal signal with the phase of 180 degrees to the digital control vector synthesis adder; And combining the first ultra-wideband constant-amplitude orthogonal signal with the phase of 270 degrees and the second ultra-wideband constant-amplitude orthogonal signal with the phase of 270 degrees and outputting the signals to the digital control vector synthesis adder.
5. The wideband low-loss phase shifter based on the hybrid quadrature generator structure of claim 4, wherein the digitally controlled vector synthesis adder synthesizes the four ultra-wideband constant amplitude quadrature signals output into two quadrature signals of a specific phase through control of digital signals.

Description

Broadband low-loss phase shifter based on hybrid quadrature generator structure Technical Field The specification relates to the technical field of phase shifters, and in particular relates to a broadband low-loss phase shifter based on a hybrid quadrature generator structure. Background In modern radar and wireless communication systems, phased array technology plays a vital role, and a phase shifter is used as a key device for realizing signal phase modulation in a phased array system, and needs to have excellent performances such as broadband, low loss, high precision, low error and the like so as to ensure signal quality and reliability, and plays a vital role in the transmission process of signals. The quadrature generator in the phase shifter is used as a key module for generating quadrature signals in the phase shifter, and has direct influence on the bandwidth, loss and error of the phase shifter. The conventional quadrature signal generating module in the phase shifter only uses a multiphase filter (PPF) structure quadrature generator (comprising an I type quadrature generator and a II type quadrature generator) or only uses a Hybrid structure quadrature generator, and the phase shifter only uses the I type PPF structure quadrature generator has the defect of poor amplitude characteristic, the quadrature signal generated by only using the II type PPF structure quadrature generator has the defect of poor phase characteristic, and the two PPF quadrature generators need to adopt a high-order form under the broadband condition and have the defect of high loss. The Hybrid structure quadrature generator has the disadvantage of larger amplitude error under the broadband condition. Disclosure of Invention It is an object of the present invention to provide a wideband low-loss phase shifter based on a hybrid quadrature generator architecture that overcomes the above-mentioned drawbacks of the prior art phase shifters. The embodiments of the present specification are implemented as follows: a broadband low-loss phase shifter based on a hybrid quadrature generator structure comprises a one-to-two power divider, a hybrid quadrature generator, a digital control vector synthesis adder and a two-to-one power combiner which are connected in sequence; The mixed orthogonal generator is formed by matching a 1-order II-type PPF orthogonal generator and a 2-order Hybrid orthogonal generator, the input end of the 1-order II-type PPF orthogonal generator is connected with the one-to-two power divider, the output end of the 1-order II-type PPF orthogonal generator is connected with the input end of the 2-order Hybrid orthogonal generator, and the output end of the 2-order Hybrid orthogonal generator is connected with the input end of the digital control vector synthesis adder; the one-to-two power divider can convert an input single-ended signal into a first differential signal; The first differential signal input by the Hybrid quadrature generator can perform amplitude compensation on the 2-order Hybrid quadrature generator through the 1-order II-type PPF quadrature generator to output a quadrature signal; The digital control vector synthesis adder can input the orthogonal signals to output second differential signals, each path of the second differential signals are constant-amplitude signals with specific phase differences, and the two-in-one combiner can synthesize each path of the input second differential signals into one path of output signals. Embodiments of the present description have at least the following advantages or benefits: Compared with the prior art, the broadband low-loss phase shifter based on the Hybrid quadrature generator structure comprises the Hybrid quadrature generator by using the 1-order II-type PPF quadrature generator and the 2-order Hybrid quadrature generator which are arranged in cascade, wherein the 1-order II-type PPF quadrature generator compensates the amplitude characteristic of the 2-order Hybrid quadrature generator, and the 2-order Hybrid quadrature generator compensates the phase characteristic of the 1-order II-type PPF quadrature generator, so that the insertion loss of the phase shifter can be effectively reduced by the Hybrid quadrature generator, and the output signal of the broadband low-loss phase shifter has the advantages of ultra-broadband, high precision and low error. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present description, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present description and should therefore not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic diagram of a wideband low-loss phase shifter based on a hybrid quadrature generator str