Broadband high-power low-loss circular power allocation synthesizer

Abstract

The invention provides a broadband high-power low-loss circular power allocation synthesizer which comprises a power allocation ring and at least one isolating ring, wherein the isolating ring is located on the outer portion of the power allocation ring. According to the technical scheme, the broadband high-power low-loss circular power allocation synthesizer is characterized in that low loss and broadband are achieved, and high amplitude and phase consistency exists between two branch circuits. The working principle of a micro-strip annular bridge is used, and therefore the problems of isolation resistance power capacity and insertion loss increase in a traditional Wilkinson power allocation synthesizer can be solved effectively.

Description

technical field [0001] The invention belongs to the technical field of ring power distribution combiner, and in particular relates to a ring power distribution combiner with wide band, high power and low loss. Background technique [0002] The broadband high-efficiency power synthesis technology of microwave signals is an important part of many fields such as high-power test systems, microwave and millimeter wave communication systems, and electromagnetic compatibility testing. Key technologies that need to be addressed. [0003] A planar power combiner is a microwave and millimeter wave circuit that combines multiple input signal energies into one output signal energy, and can also in turn divide one signal energy into multiple output channels. At this time, it can also be called a power divider. Traditional microwave and millimeter-wave planar power distribution and synthesis circuits are generally implemented with Lange couplers or Wilkinson power dividers plus quarter-w...

AI Technical Summary

Problems solved by technology

In order to increase the operating frequency bandwidth and the isolation between the two output ports 10 and 11, it must be solved by increasing the number of isolation resistors, but since the power distribution loop and the isolation loop overlap in this structure, when the power When the number of points and isolation loops increases, the loss of the power distribution / combination path will increase, resulting in a rapid decline in the efficiency of power distribution / combination

[0005] Existing planar circuit power distribution / combination technology, taking Wilkinson power distribution / combiner as an example, although it adopts a multi-section structure to obtain a wider operating frequency band and higher isolation, its disadvantages increase with the number of nodes. The insertion loss increases rapidly, which greatly reduces the efficiency of power distribution and synthesis; in addition, because the power distribution loop and the isolation loop overlap in this structure, the isolation resistance inside the loop is limited by the size of the overall structure, so it cannot be done To increase the heat dissipation area, therefore, the power capacity is greatly limited

If one of the amplifiers is damaged, or the ports of any one of the two branches are not well matched, the power of the electromagnetic wave reflected by the port to both ends of the isolation resistance will increase accordingly, so it is difficult to ensure that the isolation resistance is affected by the high power. Although it is possible to increase the power capacity by replacing the thin-film resistors on the microstrip circuit with thick-film resistors, it is difficult to effectively improve the heat dissipation efficiency while increasing the cost. Greatly reduced reliability when working or port mismatch

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