Inverting power synthesizer

Abstract

The invention provides an inverting power synthesizer, which belongs to the technical field of radio frequency and microwave power synthesis design. The synthesizer comprises a first dielectric substrate with a first microstrip line and a second dielectric substrate with a second microstrip line. Two dielectric substrates are separated by a ground plate. The output end of each microstrip line is connected with a waveguide cavity. A first ridge plate and a second ridge plate are symmetrically designed in the waveguide cavity. The first ridge plate and the second ridge plate form a continuouslynarrowing opening size when extending from one end of the waveguide cavity to the other end, and ridge waveguide is formed and impedance transformation is realized. The output end of each microstrip line is connected with a power dividing microstrip line and a load resistor to realize isolation between sub-ports. The synthesizer provided by the invention realizes reverse phase power division and has better isolation performance and port standing wave performance.

Description

technical field [0001] The application belongs to the technical field of radio frequency and microwave power synthesis design, and in particular relates to an inverting power synthesizer. Background technique [0002] In microwave and millimeter waves, 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. Common waveguide-microstrip transition technologies mainly includ...

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Problems solved by technology

[0003] In the power combining circuit, MMIC chips are usually used for power amplification, and the MMIC chips need to be matched with the microstrip line, so the signal needs to transition from the waveguide to the corresponding microstrip line. Currently, the commonly used waveguide to microstrip double probe The transition not only satisfies the conversion of the waveguide microstrip, but also realizes the power combination, but the isolation between the output ports is relatively poor. The isolation between the two channels is only 6dB in theory, and it is even worse in actual production.

When used as a power combiner, when one of the input ports is mismatched or several input ports are seriously unbalanced, it will cause a large impact on each other, resulting in a decrease in the stability of the system; although the ordinary ridge waveguide transition is the same as the probe The transition has good transition performance, but it cannot satisfy the conversion of the waveguide microstrip and the power synthesis like the double-probe transition

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