Design method of wideband high-flatness microstrip coupler

A technology of microstrip coupler and design method, which is applied in the direction of waveguide devices, circuits, connection devices, etc., can solve the problems of microstrip coupler difficulty, wide bandwidth, high coupling flatness, etc., and achieve low processing accuracy requirements, The effect of small size and good standing wave performance

Active Publication Date: 2022-01-07
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a design method for a wide-band high-flatness microstr...

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  • Design method of wideband high-flatness microstrip coupler
  • Design method of wideband high-flatness microstrip coupler
  • Design method of wideband high-flatness microstrip coupler

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Embodiment Construction

[0023] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0024] Aiming at the high flatness design requirements of broadband microstrip couplers, the present invention designs a coupler with a new structure in combination with the characteristics of resistive coupling and coupled line couplers, which can achieve good coupling performance in a small size, wide bandwidth Wide, high coupling flatness.

[0025] Such as image 3 As shown, a broadband high flatness microstrip coupler ...

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Abstract

The invention discloses a design method of a wideband high-flatness microstrip coupler, which comprises the steps of S1, realizing a relatively flat bandwidth coupling effect at a low frequency band through a resistance coupling branch, and realizing a required coupling amount by designing a resistance value of the resistance coupling branch; and S2, in a high-frequency band, through combination of the resistance coupling and coupling line branches, improving the coupling effect of a high-frequency end so as to enable the high-end coupling to realize a high-flatness coupling effect in a wide band. According to the invention, the coupling flatness in a wideband range reaches a very excellent level, and the coupling flatness in a frequency doubling bandwidth up to 20 times or above can reach within 1dB. The coupler is small in size, corresponding performance is achieved in a mode of combining a single-order coupling line and resistance coupling under the condition that standing wave performance of all ports is good and the coupling flatness is excellent, and the size is reduced by three times or above compared with a multi-order coupling line coupler.

Description

technical field [0001] The invention relates to the technical field of radio frequency circuits, in particular to a design method for a broadband high-flatness microstrip coupler. Background technique [0002] In the field of electronic countermeasures and other broadband microwave communications, broadband microwave couplers are needed for detection, correction and other purposes. Due to its relatively small size and easy integration with other microwave devices, microstrip lines are the most widely used. At present, there are three main forms of common broadband microstrip couplers: (1) coupled line couplers, such as figure 1 As shown, two unshielded transmission lines close to each other are used to realize the coupling of microwave signals, and broadband coupling can be realized through multiple stages. It depends on the order, but the more the order, the larger the size. (2) Resistive couplers, such as figure 2 As shown, that is to say, using parallel resistors to r...

Claims

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Application Information

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IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 笪余生何文波陶霞宋阳马磊强罗洋杜顺勇何渊霍炜
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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