A High Isolation Power Divider and Combiner

Abstract

The application belongs to the field of radio frequency microwave technology, and in particular relates to a power divider and combiner with high isolation. The power divider and combiner includes a waveguide cavity, including a first end and a second end opposite to each other. The first end is set as a waveguide port for power input or output, and the second end is closed by a conductive shell to form a short waveguide. On the road surface, there is a window above the waveguide cavity adjacent to the short-circuit surface of the waveguide, through which the waveguide cavity is coupled with the microstrip circuit; the microstrip circuit includes a substrate, and two microstrip circuits are arranged on the upper end surface of the substrate. line, the lower end surface of the substrate includes a joint portion used to cover the window of the waveguide cavity; the waveguide filling medium is filled at the window of the waveguide cavity, and is used to connect the substrate of the microstrip circuit with the waveguide ridges of the waveguide cavity. The structure directly realizes power distribution / combination while the waveguide microstrip is converted, and also realizes good isolation, and the structure is more compact, which is beneficial to the miniaturization design of the system.

Description

technical field [0001] The application belongs to the field of radio frequency microwave technology, and in particular relates to a power divider and combiner with high isolation. Background technique [0002] In microwave and millimeter wave, microstrip line is a very important transmission form in microwave integrated circuits. However, many microwave and millimeter wave test systems and device interfaces currently use rectangular waveguides. Therefore, waveguide-microstrip converters are widely used. It is used in the detection of microwave and millimeter wave monolithic integrated circuits and hybrid circuits, as well as in the connection between waveguides and planar circuits, so that there is a good matching transition between the two transmission lines. The waveguide-microstrip transition technology has become one of the key technologies for system realization and has been extensively studied. The common waveguide-microstrip transition technologies mainly include: pr...

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Problems solved by technology

[0003] In view of the poor isolation between the ports of the double-probe transitional combiner, which affects the stability of the system when it is used for power synthesis, and the common ridge waveguide transition has the disadvantage that it is not easy to achieve power synthesis, this patent uses the ridge waveguide to double microstrip lines The coupling transition method realizes the transition from the waveguide to the microstrip and at the same time realizes the distribution / combination of power, and introduces an isolation resistor between the double microstrip lines, thereby realizing the isolation between the sub-ports of the two microstrip lines, and at the same time Improved VSWR performance of split ports

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