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A low-loss digital phase shifter

A digital phase shifter and low-loss technology, applied in electrical components, multi-terminal pair networks, impedance networks, etc., can solve problems such as increased loss and poor electrical performance indicators, and achieve high loss, improved isolation and power capacity , The effect of high-precision phase shifting

Active Publication Date: 2022-08-09
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional digital phase shifter closes the feed loop. On the transmission path, each phase shifting unit needs to add a bias inductor and a DC blocking capacitor, resulting in increased loss and poor electrical performance.

Method used

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  • A low-loss digital phase shifter

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Embodiment Construction

[0087] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0088] In order to solve the problem that the traditional digital phase shifter realizes the closing of the feeding loop, a large number of DC blocking capacitors and bias inductance are added to the transmission path, resulting in the increase of loss and the deterioration of the performance index of the phase shifter, such as figure 1 As shown, the present application proposes a low-loss digital phase shifter, which includes:

[0089] Input unit, 180° phase shift unit, 90° phase shift unit, 45° phase shift unit, 22.5° phase shift unit and output unit, wherein each phase shift unit is connected in series, and the cascade sequence is: 180° phase shift unit , 90° phase shift unit, 45° phase shift unit and 22.5° phase shift unit.

[0090] The 180° con...

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Abstract

An embodiment of the present application discloses a low-loss digital phase shifter, the phase shifter includes: an input unit, a 180° phase shift unit, a 90° phase shift unit, a 45° phase shift unit, a 22.5° phase shift unit, and The output unit, wherein each phase shift unit is connected in series, and the cascade sequence is: 180° phase shift unit, 90° phase shift unit, 45° phase shift unit and 22.5° phase shift unit. This application proposes a low-loss digital phase shifter, which effectively reduces transmission loss and improves isolation and power capacity between branches. It solves the problem of high loss of traditional digital phase shifters, has high reliability, and can be used in engineering practice.

Description

technical field [0001] This application relates to the field of digital phase shifters. More specifically, it relates to a low loss digital phase shifter. Background technique [0002] Microwave phase shifter is a microwave control circuit whose main function is to control the phase of the microwave signal to meet the needs of the system. Phase shifters have very broad application prospects in many fields such as phased array radar, microwave communication, and satellite technology. Especially in the phased array radar system, the digital phase shifter is the key component of the T / R module. The entire radar phase shifter is used to scan the beam in the air. The loss, power capacity, phase shift accuracy and response of the phase shifter The quality of indicators such as speed directly affects the accuracy of the system beam positioning in the air and the degree of suppression of the main lobe of the beam to the side lobes. [0003] The traditional digital phase shifter r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/21
CPCH03H7/21
Inventor 龚云峰
Owner BEIJING INST OF RADIO MEASUREMENT
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