Flexible broadband branch line coupler capable of suppressing triple harmonic waves

A coupler and sub-harmonic technology, applied in waveguide-type devices, electrical components, connecting devices, etc., can solve the problems of increasing design cost, poor harmonic suppression ability and anti-stray interference ability, and increasing overall system size. , to achieve the effect of easy design, easy processing, wide microstrip line width

Active Publication Date: 2018-07-24
NANJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional branch line coupler has a common problem, its harmonic suppression ability and anti-spurious interference ability are poor, so when the branch line coupler is generally used, basically the circuit needs to add a bandpass filter in front of the input end or a A low-pass filter is added after each port to eliminate unwanted interference, noise and harmonics caused by nonlinear devices
But for this approach, designers will basically not adopt it, because it means that the size of the overall system needs to be increased, and relatively, it also increases the cost of the design

Method used

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  • Flexible broadband branch line coupler capable of suppressing triple harmonic waves
  • Flexible broadband branch line coupler capable of suppressing triple harmonic waves
  • Flexible broadband branch line coupler capable of suppressing triple harmonic waves

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Embodiment Construction

[0018] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 , figure 2 with image 3 As shown, the present invention designs a flexible broadband branch line coupler that can suppress the third harmonic. In practical applications, it specifically includes a flexible dielectric substrate 1, a metal ground layer 2 disposed on the lower surface of the flexible dielectric substrate 1, and a printed Four preset wavelength microstrip lines 4 on the upper surface of the flexible dielectric substrate 1, two first microstrip transmission lines 5, two second microstrip transmission lines 6, two first open stubs 7, and two second open stubs 8 , four input and output microstrip transmission lines 3; wherein, two first microstrip transmission lines 5 are positioned opposite each other, two second microstrip transmission lines 6 are positioned opposite each other, an...

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Abstract

The invention relates to a flexible broadband branch line coupler capable of suppressing triple harmonic waves. The coupler can be applied to the scene having requirement for the bending performance of the branch line coupler. The bandwidth in the passband is wide and the insertion loss is low. Compared with the method of additionally arranging the filter to suppress the harmonic waves, the coupler is simple in structure and easy to design; besides, the defect ground is additionally arranged in the designed coupler so that high microstrip line width can be realized and processing and implementation are easy.

Description

technical field [0001] The invention relates to a flexible broadband branch line coupler capable of suppressing third harmonics, belonging to the technical field of electromagnetic fields and microwaves. Background technique [0002] The branch line coupler is a very important device in the front-end microwave subsystem, and it has been widely used in mixers, power amplifiers, power dividers, RFID and other occasions. Modern electronic countermeasure systems, measuring instrument systems and other microwave systems cover more and more wide frequency bands. This trend puts forward a wide frequency band requirement for various microwave devices. Branch line directional couplers, which are widely used in microwave systems, are also challenged in this respect, so it is of urgent practical significance to develop broadband branch line directional couplers. [0003] The traditional branch line coupler has a common problem, its harmonic suppression ability and anti-spurious interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/12H01P5/16
CPCH01P5/12H01P5/16
Inventor 于映史博文
Owner NANJING UNIV OF POSTS & TELECOMM
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