High-isolation power divider and power combiner

Abstract

The invention belongs to the technical field of radio frequency microwaves, and particularly relates to a high-isolation power divider / combiner. The power divider / combiner comprises a waveguide cavity, the waveguide cavity comprises a first end and a second end which are opposite to each other, the first end is provided with a waveguide port for power input or output, the second end is closed by aconductive shell to form a waveguide short-circuit surface, a window is arranged above the waveguide cavity adjacent to the waveguide short-circuit surface, and through the window, the waveguide cavity is coupled with the microstrip circuit; a microstrip circuit comprises a substrate, two paths of microstrip lines are arranged on the upper end surface of the substrate, and the lower end surface of the substrate comprises a section of joint part used for covering the window of the waveguide cavity; and a waveguide filling medium fills the window of the waveguide cavity and is used for connecting the substrate of the microstrip circuit with the waveguide ridge of the waveguide cavity. According to the structure, power distribution / combination is directly realized while waveguide microstripconversion is carried out, good isolation is realized, the structure is more compact, and miniaturization design of the system is facilitated.

Description

Technical field[0001]This application belongs to the field of radio frequency and microwave technology, and particularly relates to a high isolation power splitting power combiner.Background technique[0002]In microwave and millimeter wave, microstrip line is a very important form of transmission in microwave integrated circuits. However, at present, many microwave and millimeter wave test systems and device interfaces 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 the connection of 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 widely studied. Common waveguide-microstrip transition technologies mainly include: probe transition, ridge wav...

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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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