A Miniaturized Broadband High Power Coupler

Abstract

The invention discloses a miniaturized broadband high-power coupler, and belongs to the technical field of radiofrequency and microwave engineering. The miniaturized broadband high-power coupler comprises a coaxial line coupling circuit. The coaxial line coupling circuit comprises an inner conductor and an outer conductor, the inner conductor and the outer conductor are separated from each other by dielectric materials, a capacitor is formed between the inner conductor and the outer conductor, and electromagnetic coupling is carried out on electromagnetic signals between the inner conductor and the outer conductor; the outer conductor is used as a direct circuit for carrying high-power signals, and coupled low-power sampling signals can be carried by the inner conductor; high power specifically refers to kilowatt-grade power, and low power refers to watt-grade power. The miniaturized broadband high-power coupler has the advantages that the miniaturized broadband high-power coupler is simple and reasonable in structure, low in loss, good in directivity and wide in work bandwidth and is small; the outer conductor of a single coaxial line is used as the direct circuit of the miniaturized broadband high-power coupler, the inner conductor is used as a coupling circuit, and accordingly the high-power tolerance properties of the miniaturized broadband high-power coupler can be improved; the coupling degree of the miniaturized broadband high-power coupler in low-frequency bands can be effectively improved by loaded equalization circuits, and the overall dimensions of the miniaturized broadband high-power coupler can be reduced to a great extent.

Description

technical field [0001] The invention belongs to the technical field of radio frequency and microwave engineering, and in particular relates to a miniaturized broadband high-power coupler. Background technique [0002] Directional couplers are passive microwave devices that can achieve directional coupling in microwave systems, and are widely used in microwave and millimeter wave fields such as power measurement, power monitoring, power distribution and synthesis. For example, equipment such as automatic gain controllers, phase modulators, reflectometers, and microwave impedance bridge instruments can quantitatively extract a certain amount of power through directional couplers, so as to accurately measure the signal power in the microwave system; the signal power of the radar feeder system Acquisition and injection, the power meter in the signal generator, the control module of the high-power microwave heater, etc. realize the real-time control of the communication and feede...

AI Technical Summary

Problems solved by technology

[0006] In the patent with the authorized announcement number CN206921990U, the title is "an ultra-wideband high-power coupler", which discloses a radio frequency coupler. The coupler adopts a stripline structure and has a working bandwidth of 1-520MHz. The coupler design is a conventional structure, its volume is large, and it is difficult to further improve the withstand power

[0007] To sum up, in the frequency band of several megahertz to hundreds of megahertz, the existing directional coupler mainly adopts the design of microstrip line, stripline, or waveguide structure. Comprehensive indicators such as high power tolerance and high coupling degree

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