A retractable high-gain spaceborne microstrip array antenna structure

Abstract

The invention proposes a retractable high-gain space-borne microstrip array antenna structure, which includes a plurality of microstrip antenna units arranged in an array form; the microstrip antenna unit adopts a multi-layer composite molding structure, and the upper and lower skins are reinforced with glass fibers Cloth, the middle interlayer adopts polyimide foam bearing frame and aramid paper honeycomb filling structure, and hinge connection embedded parts are fixed at four corners; the outer side of the upper skin is fixed with an antenna radiator, and the outer side of the lower skin is fixed with a ground plate, and the antenna radiates There are spacers fixed on the body and the ground plate; the microstrip antenna unit has two radio frequency connection ports X and Y. When the microstrip array antenna is in the unfolded state, the X port on all the microstrip antenna units is in the same direction, and all the microstrip antenna units have the same direction of the X port. The direction of the Y port is the same; the radio frequency connection outlet is connected to the power division network through the radio frequency cable; in the microstrip array antenna, the adjacent antenna units are connected by a flexible tape measure spring hinge. The invention can meet the requirements of the retracted volume and the load applied to the micro-satellite and the Wiener satellite platform.

Description

technical field [0001] The invention relates to the technical field of microstrip array antennas, in particular to a retractable high-gain space-borne microstrip array antenna structure. Background technique [0002] The narrow frequency band of the microstrip antenna is its inherent defect, and its relative bandwidth is 1% to 6%. Although several methods for expanding the frequency band have been proposed in some literatures, such as using a double-layer microstrip patch structure, this will The structure of the antenna is complex, and the original high-gain performance index is difficult to achieve, and the existence of the air layer also makes the antenna itself easy to be damaged in some complex environments. Therefore, the microstrip antennas are formed into a multi-antenna array system according to a specific arrangement, and different array patterns can be generated by using different feeding structures at the same time, which can achieve the purpose of improving the ...

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Problems solved by technology

[0004] However, due to the limitations of structure and materials, it is difficult to effectively ensure the surface accuracy of the film antenna array for the current spaceborne microstrip array antenna, and it is also difficult to ensure the high gain performance of the microstrip antenna.

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