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A vector modulation phase shifter for reconfigurable antenna array beamforming

A technology of vector modulation and antenna reconstruction, which is applied in the direction of antenna, phase shifting network, amplification control, etc., can solve the problems of I/Q error, large insertion loss, low accuracy of amplitude modulation unit, etc., and achieve offset and gain , small insertion loss, and the effect of suppressing common mode effects

Inactive Publication Date: 2020-09-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyphase filter PPF can produce high-quality quadrature signals, but the insertion loss is large
The quadrature all-pass filter QAF has the advantage of small insertion loss and can even provide a certain voltage gain. However, in the mmWave frequency band, its load capacitance can be compared with the internal QAF capacitor, which will lead to significant I / Q error
And the accuracy of the amplitude modulation unit in the previous active phase shifter system is low

Method used

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  • A vector modulation phase shifter for reconfigurable antenna array beamforming
  • A vector modulation phase shifter for reconfigurable antenna array beamforming
  • A vector modulation phase shifter for reconfigurable antenna array beamforming

Examples

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Embodiment Construction

[0025] like figure 1 As shown, a vector modulation phase shifter for reconfigurable antenna array beamforming, including:

[0026] Input baluns for converting single-ended input signals to differential input signals;

[0027] Orthogonal signal generator, after the differential input signal passes through the quadrature signal generator, two orthogonal differential signals are generated: I signal and Q signal;

[0028] A variable gain amplifier, including an I variable gain amplifier for amplitude modulation and vector synthesis of the I signal, and a Q variable gain amplifier for amplitude modulation and vector synthesis of the Q signal;

[0029] Output balun, used to convert differential signal to single-ended signal output;

[0030] The input terminal A1 of the input balun is connected to the single-ended input signal, the ground terminal A2 of the input balun is grounded, the first differential output terminal A3 of the input balun is connected to the first differential i...

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Abstract

The invention relates to a vector modulation phase shifter for reconfigurable antenna array beamforming, comprising: an input balun for converting a single-ended input signal into a differential inputsignal; an orthogonal signal generator, wherein the differential input signal passes through the orthogonal signal generator to generate two paths of orthogonal differential signals, namely an I-pathsignal and a Q-path signal; a variable gain amplifier comprising an I-path variable gain amplifier used for carrying out amplitude modulation and vector synthesis on the I-path signal, and a Q-path variable gain amplifier used for carrying out amplitude modulation and vector synthesis on the Q-path signal; and an output balun used for converting the differential signal into a single-ended signaland outputting the single-ended signal. The variable gain amplifier is suitable for the SiGe BiCMOS process, the balun of a transformer structure is adopted, phase and amplitude imbalance is reduced,the bandwidth of orthogonal signals is widened through the low-coupling-coefficient quadrature coupler, and the amplitude control precision is improved through the variable gain amplifier achieved bycontrolling bias currents combined with the Gilbert cell.

Description

technical field [0001] The invention relates to the technical field of active phase shifters, in particular to a vector modulation phase shifter for reconfigurable antenna array beamforming. Background technique [0002] In recent years, reconfigurable antenna arrays have been developed rapidly. The phase shifter is a key module in the phased array system, which realizes beamforming and scanning by controlling the phase of the signal transmitted by each antenna element in the antenna array. With the continuous increase of the operating frequency and the continuous increase of the scanning angle range, the distance between the elements of the phased array antenna must become smaller and smaller. Amplitude and phase modulation have high precision requirements, so phased array antennas have higher and higher requirements on the phase modulation performance of the transceiver component TR, and the size requirements of the transceiver component are also smaller and smaller. Usi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45H03F1/56H03F1/42H03F1/02H03G3/30H03H11/16H01Q3/36
CPCH03F3/45484H03F3/45928H03F1/56H03F1/42H03F1/0205H03G3/3084H03H11/16H01Q3/36
Inventor 桑磊李帅涛马霄霄黄文
Owner HEFEI UNIV OF TECH
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