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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: 2010-06-16
北京东方信联无线通信有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
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Embodiment Construction

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

[0047] see figure 1 , which is a structural diagram of the first embodiment 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 two secondary windings of the first transmission line transformer T1 are grounded end to end. The ends of the two secondary windings of the second transmission line transformer T2 are connected to the ground.

[0050] Since the end of the secondary winding is connected to the ground, the first transmission line ...

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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 line transformer 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 line transformer 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 realize quadrature phase shift of broadband signals.

Description

technical field [0001] The invention relates to the technical field of signal transformation, in particular to a wideband quadrature phase shifter. Background technique [0002] First, a few professional terms in this field are introduced: [0003] Phase shift amount: The phase difference between the output signal and the input signal after the phase shifter 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 by which the phase shift amount 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 phases are opposite, for example, 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, one end outputs The phase of the signal is -90°, while the phase of the output signal at the other end is +90°. [000...

Claims

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Application Information

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Patent Type & Authority Applications(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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