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Broadband quadrature phase shifter

A phase shifter and broadband technology, applied in the field of signal transformation, can solve the problem of equalization of quadrature shift that is not suitable for broadband, and achieve the effect of small phase shift error and high quadrature precision.

Inactive Publication Date: 2012-05-30
北京东方信联无线通信有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this method of absolute phase shifting can only be used for single-frequency phase shifting, or narrow-spectrum signal phase shifting that allows small spectral distortion, and is not suitable for broadband quadrature phase shifting

Method used

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  • Broadband quadrature phase shifter
  • Broadband quadrature phase shifter
  • Broadband quadrature phase shifter

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Embodiment Construction

[0046] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0047] see figure 1 , which is a structural diagram of Embodiment 1 of the broadband quadrature phase shifter provided by the present invention.

[0048] The broadband quadrature phase shifter provided in this embodiment includes: a first transmission line transformer T1, a second transmission line transformer T2, a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2.

[0049] The end-to-end connection of the two secondary windings of the first transmission line transformer T1 is grounded. The end-to-end connection of the two secondary windings of the second transmission line transformer T2 is grounded.

[0050]Since the end-to-end connection of the secondary windings is grounded, both the first tr...

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Abstract

The invention provides a broadband quadrature phase shifter which comprises a first transmission line transformer, a second first transmission line transformer, a first capacitor, a second capacitor, a first resistor and a second resistor; two secondary windings of the first transmission line transformer are connected end to end and grounded; two secondary windings of the second transmission linetransformer are connected end to end and grounded; the upper end of the primary winding of the first transmission line transformer is grounded; the lower end of the primary winding of the second transmission line transformer is grounded; the primary winding of the first transmission line transformer is connected with the first capacitor and the first resistor in series in sequence to form a closed loop, and the sharing end of the first capacitor and the first resistor is connected with the first output end of the quadrature phase shifter; the secondary windings of the second transmission linetransformer are connected with the second capacitor and the second resistor in series in sequence to form a closed loop, and the sharing end of the second capacitor and the second resistor is connected with the second output end of the quadrature phase shifter. Due to transmitting signals of wide frequency range, the transmission line transformers can be used as phase inverter circuits to realizequadrature phase shift of broadband signals.

Description

technical field [0001] The invention relates to the technical field of signal conversion, in particular to a broadband quadrature phase shifter. Background technique [0002] First introduce a few professional terms in this field: [0003] Phase shift amount: the phase difference between the output signal and the input signal after the phase shifter phase-shifts the input signal. [0004] Quadrature phase shift: The phase shifter shifts the phase of the input signal by 90°. [0005] Quadrature accuracy: the error value that the phase shift deviates from 90°. [0006] Inverting circuit: a circuit with two output terminals, the frequency and waveform of the two output signals are the same, but the phase is opposite, such as the phase of the output signal at one end is 0°, and the phase of the output signal at the other end is 180°; or, the output signal at one end The phase of the signal is -90°, while the phase of the output signal at the other end is +90°. [0007] At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/21
Inventor 徐鼎伟韩大庆刘红
Owner 北京东方信联无线通信有限公司
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