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Inverted coplanar waveguide coupler with integrated microstrip connection ports

A coplanar waveguide and coupler technology, applied in the field of signal couplers, can solve the problems of occupying the space of the circuit board and increasing the complexity of the circuit structure, etc.

Inactive Publication Date: 2009-07-29
CREE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This increases the complexity of the circuit structure and takes up additional board space

Method used

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  • Inverted coplanar waveguide coupler with integrated microstrip connection ports
  • Inverted coplanar waveguide coupler with integrated microstrip connection ports
  • Inverted coplanar waveguide coupler with integrated microstrip connection ports

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Embodiment Construction

[0013] figure 1 is a functional block diagram of a microwave circuit in which the input signal is provided at 10 via coupler 12 to phase quadrature balanced amplifiers 54 , 56 whose amplified output is provided via coupler 18 to output 20 . Typically, the input lines 10 and output lines 20 are microstrips comprising metal traces on opposite surfaces of the substrate on one surface of the substrate on a grounded metal layer, and the coupler 12, 18 are coplanar metal traces. US Patent 5,629,654 to Frick discloses an input and output microstrip with coplanar couplers 12 each formed on one surface of a printed circuit substrate. As mentioned above, this structure cannot save cost and space.

[0014] According to the present invention, by arranging the input and output lines of the microstrip on one surface of the substrate and the coplanar waveguide coupler lines on the other surface of the substrate, and the input and output lines pass through the substrate The lined vias are ...

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PUM

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Abstract

A coplanar coupler (14) for use with microstrip input and output ports, including a printed circuit substrate, wherein first and second metal input ports are formed on the top surface and are connected to the metal on the bottom surface. The layers cooperate to function as microstrip lines, and first and second metal output ports are formed on the top surface and cooperate with the metal layer on the bottom surface to function as microstrip lines. A metal layer (24) on the bottom surface serves as a ground plane for the input and output ports, the metal layer being removed beneath at least portions of the metal input and output ports and in the coupler areas extending therebetween. First and second metal lines (31, 32) are formed on the bottom surface in the coupler area and serve as coplanar couplers for the input and output ports. Electrical vias in the substrate interconnect the port with the coplanar coupler.

Description

technical field [0001] The present invention generally relates to microwave circuits, and in particular, the present invention relates to a signal coupler for microwave circuits. Background technique [0002] Microwave circuits typically use signal couplers between circuit sections. A variety of coupler structures have been used in the past, including microstrip coupled lines, stripline coupled lines, and coplanar waveguide coupled lines. The most common form of microwave circuits is the microstrip transmission line. Microstrip couplers, such as Lange couplers, are difficult to fabricate in printed circuit boards where in-line processing resolution and space are limited. This is especially the case when higher coupling values ​​of the order of -3dB (ie half the incoming energy) are required. It has previously been demonstrated that coplanar waveguide couplers can meet the requirements for high coupling values ​​while requiring only moderate resolution in line width and ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/18H01P1/00H01P5/08H05K1/02
CPCH05K1/0237H01P5/186H01P5/18
Inventor E·J·小克雷斯岑兹
Owner CREE INC
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