Fully-integrated large-frequency-ratio double-frequency double-fed folding reflective array antenna

Abstract

The invention, which belongs to the technical field of the antenna, discloses a fully-integrated large-frequency-ratio dual-frequency double-fed folding reflective array antenna comprising a dual-frequency polarization selection surface, a polarization torsion reflective array and at least one dual-frequency dual-polarization integrated feed source unit. The dual-frequency dual-polarization integrated feed source unit is integrated in the center of the polarization torsion reflection array and comprises a first 1 * 2 series-feed microstrip with f1 frequency forming an x polarization wave beam, a second 1 * 2 series-feed microstrip with f2 frequency forming a y polarization wave beam and four parasitic patches arranged in four quadrants which are vertically crossed, wherein the first 1 * 2 series-feed microstrip and the second 1 * 2 series-feed microstrip are vertically crossed, and the four parasitic patches are arranged in four quadrants which are vertically crossed. The dual-frequency polarization selective surface reflects the x polarized wave and transmits the y polarized wave at the f1 frequency, and reflects the y polarized wave and transmits the x polarized wave at the f2 frequency; the polarization torsion reflection array converts linear polarization into orthogonal polarization, and incident spherical waves are converted into plane waves. The feed source antenna gain and wave beam symmetry under two frequencies can be improved, and the cost and the profile height are reduced.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a fully integrated large-frequency ratio dual-frequency double-fed folded reflection array antenna. Background technique [0002] The emission frequency band of wireless communication systems such as satellite communication is different from the electromagnetic wave polarization of the reception frequency band. In order to improve the system integration and functionality, low profile, dual frequency, dual polarization and other requirements are put forward for the antenna. [0003] Reflectarray antennas have the advantages of planarization, high gain, low cost, and easy processing, and are widely used in wireless communication scenarios with high gain requirements. However, the overall size of the reflectarray antenna composed of the feed and the reflection front is large, and the folded reflectarray antenna can reduce the overall height to half of the original, so i...

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