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Millimeter-band ultra-small branch line coupler

A millimeter wave band, ultra-miniature technology, applied in waveguide-type devices, electrical components, connecting devices, etc., can solve problems such as difficulty in miniaturization, and achieve the effects of miniaturization, port impedance matching, and size reduction

Inactive Publication Date: 2019-03-26
ANHUI SUN CREATE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Each branch of the coupler is a quarter of the transmission wavelength, so that the amplitude of the output ports is the same, the phase difference is 90°, the impedance of the coupling arm of the branch line is equal to the characteristic impedance of the transmission line, and the impedance of the series branch arm is equal to the transmission line 0.707 times the characteristic impedance, the size of this coupler is basically determined by the determination of the working wavelength, it is difficult to achieve miniaturization

Method used

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  • Millimeter-band ultra-small branch line coupler
  • Millimeter-band ultra-small branch line coupler
  • Millimeter-band ultra-small branch line coupler

Examples

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Embodiment 1

[0040] The coupler of this embodiment takes the center frequency f 0 =29GHz, starting frequency f 1 =28GHz, stop frequency f 2 =30GHz, relative bandwidth (RBW)=(f 2 -f 1 ) / f 0 =7% to design.

[0041] The plate design of the traditional branch line coupler is Rogers6002, the dielectric constant ε = 2.94, and the plate thickness h = 0.127mm. Calculated by relevant software, the characteristic impedance Z 0 =50Ω, a quarter of the transmission waveguide wavelength λg=1.73mm.

[0042] The plate design of the branch line coupler in this embodiment also selects Rogers6002, the dielectric constant ε=2.94, and the plate thickness h=0.127 mm.

[0043] Obtain the simulation structure diagram of this embodiment through simulation such as figure 1 , figure 2 , image 3 shown by figure 2 , image 3 It can be obtained that the width W1=0.23mm and the length L1=0.74mm of the parallel branch arm I11 and the parallel branch arm II12, the width W2=0.38mm and the length L2=1.11mm of...

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Abstract

The invention belongs to the field of passive devices and particularly relates to a millimeter-band ultra-small branch line coupler, which comprises a square ring, an input port, an isolation port, anoutput port I and an output port II, wherein the input port and the isolation port are arranged on the two adjacent corners of the square ring respectively; the output port I and the output port II are disposed on the other two corners of the square ring respectively; and a wide microstrip line slice group is disposed at an intermediate position of the square ring. The branch line coupler of thepresent invention can equivalently compress a transmission wavelength, thereby reducing the size of the branch line coupler. The miniaturization of the branch line coupler is achieved without affecting the performance of a branch coupler.

Description

technical field [0001] The invention belongs to the field of passive devices, and in particular relates to an ultra-small branch line coupler in the millimeter wave band. Background technique [0002] In recent years, with the continuous advancement of science and technology, especially the rapid development of Internet of Things technology and radio frequency microwave technology, people are paying more and more attention to the miniaturization, mobility and high integration of electronic equipment, which puts forward more and more requirements for the miniaturization of related devices. Come higher demands. The design concepts of some traditional devices can no longer meet these requirements. [0003] A traditional branch line coupler is a four-port network consisting of a square ring whose perimeter is a transmission wavelength. Each branch of the coupler is a quarter of the transmission wavelength, so that the amplitude of the output ports is the same, the phase differ...

Claims

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Application Information

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IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 高静徐小虎孙浩李霞袁士涛
Owner ANHUI SUN CREATE ELECTRONICS
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