Active microstrip reflective array unit and microstrip reflective array antenna

Abstract

The invention provides an active microstrip reflective array unit. The unit comprises a rectangular patch, a dielectric substrate, a slotting floor loaded with a variable capacitor, a foam layer and a floor from top to bottom, wherein the slotting floor loaded with the variable capacitor is a metal plate opened with a slot, the variable capacitor is loaded at the middle of the slot, and the foam layer is a honeycomb flat plate made of foam material or paper. Further, the invention also provides a microstrip reflective array antenna. The antenna comprises a feeding source and a reconfigurable microstrip reflective array, wherein the feeding source is a pyramidal horn antenna, the reconfigurable microstrip reflective array comprises a plurality of active microstrip array units which are transversely, longitudinally and uniformly arranged, and the size of the slot of the slotting floor loaded with the variable capacitor of each active microstrip reflective array unit is same. The microstrip reflective array antenna provided by the invention has favorable wide-angle wave beam scanning performance, is relatively simple in structure, and has favorable performance.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to an active microstrip reflection array unit and a microstrip reflection array antenna. Background technique [0002] In recent years, with the rapid development of aerospace technology, satellite communication and deep space exploration technology, more and more knowledge and research have been made on large-aperture high-gain antennas. Traditional high-gain antennas mainly include parabolic antennas or array antennas, but the two Both have shortcomings. The parabolic antenna itself is too bulky and heavy, and its special parabolic structure is difficult to process, and the scanning of the main beam of this type of antenna is realized by changing the position of the feed source, so its scanning range is very limited. Although the array antenna has a large scanning range, it requires a complex feed network and expensive T / R components, resulting in increased transmission loss, di...

AI Technical Summary

Problems solved by technology

However, the above four methods of phase compensation can only achieve fixed beam pointing, and cannot achieve multi-beam scanning function, because once the phase delay line length, patch size, rotation angle, and slit length loaded on the microstrip patch are determined After that, the phase that the unit can compensate is determined, and the beam direction of the reflectarray is also determined

[0005] Traditional beam-scanning reflectarrays loaded with MEMS switches and digital phase shifters can only achieve several discrete beam points, and cannot achieve beam points in any direction.

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