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Balance-type branch line coupler with filter function

A coupler and balanced technology, applied in the field of balanced branch line couplers, can solve the problems of inconvenient connection of differential devices, no differential signal power distribution function and filtering function, and inability to suppress environmental noise well

Active Publication Date: 2015-09-30
GUANGDONG SHENGLU TELECOMM TECH +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problems existing in the prior art that the branch line couplers are all single-ended designs, cannot suppress environmental noise well, have no power distribution function and filtering function of differential signals, and are inconvenient to connect with differential devices. A balanced branch line coupler with filtering function is provided to realize the technical effects of power distribution, filtering processing and common mode signal suppression for differential signals

Method used

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  • Balance-type branch line coupler with filter function
  • Balance-type branch line coupler with filter function
  • Balance-type branch line coupler with filter function

Examples

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Embodiment 1

[0036] Please refer to figure 1 , the embodiment of the present invention provides a balanced branch line coupler with filtering function, the coupler includes: a first resonator 10, a second resonator 20, a third resonator 30, a fourth resonator 40, a first coupled microstrip line 50, and a second coupled microstrip line 60;

[0037] The first resonator 10, the second resonator 20, the third resonator 30 and the fourth resonator 40 all have positive and negative signal transmission ends; the first resonator 10 and the second resonator 20 are coupled face to face, and the third resonator 30 and the fourth resonator 40 are face-to-face coupled; the first coupled microstrip line 50 and the second coupled microstrip line 60 both have positive and negative signal transmission lines;

[0038] The negative signal transmission ends of the first resonator 10 and the third resonator 30 are all connected to the negative signal transmission line of the first coupled microstrip line 50, ...

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Abstract

The invention discloses a balance-type branch line coupler with a filter function and solves the technical problem that a branch line coupler in the prior art cannot inhibit environmental noise well, does not has functions of power distribution and filter of differential signals and is inconvenient for being connected with a differential device due to the fact that only one end is designed on the branch line coupler. The balance-type branch line coupler comprises four resonators (10, 20, 30 and 40) and two coupling microstrip lines (50 and 60), positive and negative signal transmission ends of each of the first and third resonators (10 and 30) are connected with positive and negative signal transmission lines of the first coupling microstrip line (5), positive and negative signal transmission ends of the first and second resonators (10 and 20), positive and negative signal transmission ends of each of the second and fourth resonators (20 and 40) are connected with positive and negative signal transmission lines of the second coupling microstrip line (6), and the positive and negative signal transmission ends of the third and fourth resonators (30 and 40) are communicated. The balance-type branch line coupler has the advantage that power distribution, filter and common-mode signal suppression of the differential signals are realized.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave circuits and antennas, in particular to a balanced branch line coupler with filtering function. Background technique [0002] In microwave and millimeter wave commercial and military communication systems, balanced circuits are becoming more and more popular due to their strong anti-electromagnetic interference capability, good noise suppression, and easy connection with other balanced circuits. As an important device in the microwave system, the coupler distributes the power of the microwave signal according to a certain ratio. Couplers are used in balanced amplifiers, microwave network analyzers, automatic gain control, and power devices in signal generators. In addition, couplers play an important role in microwave components and complete machines that implement various functions. Therefore, the design of the balanced branch line coupler is very important. However, the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/18
Inventor 施金强俊陈建新唐慧秦伟周立衡褚慧
Owner GUANGDONG SHENGLU TELECOMM TECH
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