High-power isolation resistor of microwave power divider and design method of isolation resistor

Abstract

The invention relates to a high-power isolation resistor of a microwave power divider and a design method of the isolation resistor. A double-lead flange resistor is adopted, the inner pattern of the isolation resistor is of a structure shaped like a Chinese character 'wang' so that the area can be narrowed, stray capacitance is reduced, and meanwhile the influences on power capacity are reduced. The high-power isolation resistor is large in size and is provided with a heat dissipation metal base, the larger packaging size needs to be selected when the requirement for power capacity is higher, and therefore the influences of the stray capacitance on performance of the power divider are larger. The ANSOFT Designer software and the ANSOFT HFSS software are used for conducting collaborative simulation, the size of the inner pattern of the isolation resistor also serves as an optimization variable of three-dimensional electromagnetic field full-wave simulation and is optimized together with the size of a microwave transmission line in the power divider, and therefore the best inner pattern of the isolation resistor can be finally obtained while power capacity is not influenced, and the design of the resistor is completed.

Description

technical field [0001] The invention belongs to the field of microwave planar transmission line devices such as microstrip lines and striplines, and specifically relates to an isolation resistor and a design method in a high-power microwave power divider, which are applied to improve the performance of the high-power microwave power divider. Background technique [0002] In order to reduce the side lobe of the phased array antenna, it is often necessary to use a multi-channel microwave power divider to achieve amplitude weighting among the antenna elements. In the microwave bands with lower frequencies such as P, L, and S, because the size of the metal waveguide is too large, the high-power feed network generally adopts microwave planar transmission line structures such as microstrip lines and strip lines. [0003] In order to reduce the mutual influence between the elements of the array, phased array antennas that require high amplitude and phase accuracy generally require ...

AI Technical Summary

Problems solved by technology

The large size of high-power isolation resistors leads to large parasitic inductance and capacitance. If the existing isolation resistors on the market are directly used to realize high-power power splitters, the standing wave and loss performance of the power splitters will inevitably be poor.

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