Miniaturized mixed ring based on composite transmission line structure

Abstract

A miniaturized mixed ring working at 5.8 GHz based on composite transmission line structure belongs to the technical field of microwave component. In the invention, a section of linear 270-degree phase composite shift microstrip wire is used for replacing a semicircular arc 270-degree phase shift microstrip line in the traditional mixed ring; the main body structure of the linear 270-degree phase shift composite microstrip line is a semi-closed left-and-right hands composite transmission line so that the integral structure of the component is more compact and convenient to integrate the plane circuit; the side leakage and the interference of signal energy can be reduced; in design process, by regulating the structural size of the composite transmission line, the invention can conveniently regulate the parameters of the component such as specific impedance, phase shift quantity, transmission coefficient, and the like, thereby satisfying different design requirements.

Description

technical field [0001] The invention belongs to the field of electronic technology, relates to microwave devices, in particular to a novel miniaturized mixing ring. Background technique [0002] Hybrid rings are commonly used devices in microwave systems for the distribution or synthesis of microwave power. Traditional microstrip hybrid rings such as figure 1 As shown, it includes a circular microstrip line and four input / output port microstrip lines 1-1, 1-2, 1-3 and 1-4 of the same size, and the four input / output port microstrip lines are located at The surface of the dielectric plate; the four input / output port microstrip lines 1-1, 1-2, 1-3 and 1-4 are connected with the annular microstrip line and are on the diameter extension line of the annular microstrip line , where the connection points of the input / output port microstrip lines 1-2 and 1-3 and the annular microstrip line divide the annular microstrip line into two semicircular arc microstrip lines, and the input / ...

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Problems solved by technology

[0005] The above-mentioned hybrid ring is limited by the characteristics of the linear change of the phase length of the microstrip line, which makes the device size larger, which is not conducive to the integration of multiple devices; at the same time, due to the The phenomenon of side radiation and interference is relatively serious, so that the semi-circular microstrip line in the device will cause a large energy loss or introduce external noise

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