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Lange coupler

A coupler and finger technology, which is applied in the field of couplers, can solve the problems of deterioration, affecting the noise figure of microwave/millimeter wave balanced wideband low noise amplifiers, increasing the resistive loss of Lange couplers, etc., so as to reduce the degree of deterioration Effect

Inactive Publication Date: 2013-03-06
BEIJING ZHONGKE XINWEITE SCI & TECH DEV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But because one of the wiring will increase the resistive loss of the Lange coupler, so for the Lange coupler applied to the microwave / millimeter wave balanced broadband low-noise amplifier, the loss of the Lange coupler is directly related to the noise Therefore, under the above technology, it will seriously affect the noise figure of the microwave / millimeter wave balanced wideband low noise amplifier and make it worse

Method used

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Embodiment Construction

[0024] The Lange coupler of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] see figure 2 As shown in , the Lange coupler of the present invention uses metal layers of different thicknesses to make the fingers 25 and the interconnection lines 26 between the fingers 25, that is, for the fingers 25, it uses two Wiring (thick metal) is made, but for the interconnection 26 between the said finger bars 25, then it is to adopt primary wiring (thin metal) to make; The joints between the interconnection lines 26 are connected by engraved holes 28, and the intersections of the interconnection lines 26 between the above-mentioned finger strips 25 and the above-mentioned finger strips 25 are crossed by air bridges 27. Therefore, by adopting the above-mentioned structure, Thereby, the reduction of the loss of the Lange coupler can be realized, and at the same time, the generation of MIM capac...

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Abstract

The invention discloses a Lange coupler which is applied to an MMIC balance amplifier. The Lange coupler consists of fingers and interconnection lines between the fingers according to the MMIC process design. The fingers are made of a secondary wiring thick metal, and the interconnection lines between the fingers are made of a primary wiring thin metal; moreover, the interconnection lines between the fingers are positioned under the fingers; joints of the fingers and the interconnection lines between the fingers are connected by etch holes; infalls of the fingers and the interconnection lines between the fingers adopt air bridge span technology; therefore, the structure further reduces the effect of parasitic capacitance. Compared with the prior Lange coupler, the Lange coupler can obviously reduce consumption, and a microwave / millimeter wave balance wideband low-noise amplifier consisting of the Lange coupler with the structure can obtain good noise coefficient and input / output standing wave ratio in a wideband range.

Description

technical field [0001] The present invention relates to a coupler, in particular to a Lange coupler used for a MMIC (Monolithic Microwave Integrated Circuit, Chinese name is monolithic microwave integrated circuit) balanced amplifier. Background technique [0002] As we all know, the Lange coupler is widely used in the structure of the balanced amplifier, and compared with other couplers, the balanced amplifier formed by the Lange coupler can obtain a wider bandwidth, and can improve the input and output. The matching condition of the port, and can get a good input and output VSWR, and improve the stability. At the same time, the balanced amplifier based on the Lange coupler also improves the linearity of the amplifier, so that the 1dB compression point is improved by 3dB, and the third-order intermodulation is improved by 3dB. [0003] In the lower frequency band, due to the relatively large size of the Lange coupler, microstrip lines are generally used to make finger stri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/00
Inventor 刘训春黄清华张宗楠郝明丽
Owner BEIJING ZHONGKE XINWEITE SCI & TECH DEV