A dual-band high-isolation wide-angle scanning composite aperture array antenna

Abstract

The invention discloses a dual-band high-isolation wide-angle scanning composite aperture array antenna, which comprises a C-band planar printed vibrator antenna, a Ku-band open waveguide antenna, a C-band connector, a Ku-band connector and supporting foam. The C-band planar printed vibrator antenna is a microstrip antenna printed on a single-layer microwave dielectric substrate, and the working mode is horizontal polarization; the bottom of the Ku-band aperture waveguide antenna is directly designed with a multi-stage wave-to-column converter, and the working mode is vertical polarization. The C-band connector is a short radio frequency cable with impedance transformation, one end of which is in the form of a soldering pin, which can be directly welded to the C-band antenna unit, and the other end can choose different types of radio frequency connectors according to requirements; Ku-band connection Different types of RF connectors can be selected according to the requirements; the section height difference between the C-band planar printed dipole antenna and the Ku-band open waveguide antenna is 1 / 4λ c or 3 / 4λ c , the C-band planar printed dipole antenna is supported by the support foam in the middle.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a dual-band high-isolation wide-angle scanning composite aperture array antenna. Background technique [0002] With the development of new technologies and the application of new operational concepts, the development characteristics of future air strike weapons and air strike patterns have undergone significant changes. Radar needs to complete the functions of search, tracking and command guidance. In order to realize the different functions of the radar, different working frequency bands are usually selected to take into account the search requirements of high power and large airspace, as well as the requirements of high precision and high data rate tracking and guidance, and at the same time require superior low-altitude performance. At the same time, in order to improve system integration, small size and good adaptability, the development of single-sided dual-band common-aperture rotat...

AI Technical Summary

Problems solved by technology

For example, the patent "a low-profile dual-frequency two-dimensional wide-angle scanning common-aperture phased array antenna", application number: CN110112573A, adopts the form of stripline and microstrip line, stacked back-feed structure and middle dielectric layer sequentially from bottom to top , the second middle metal copper clad layer, the upper dielectric layer and the upper metal copper clad layer, and the first metallized via hole and the second metallized via hole; the first metallized via hole runs through the second middle metal copper clad layer, the middle layer The dielectric layer and the backfeed structure together form a low-frequency antenna; the second metallized via hole corresponds to the first metallized via hole one by one, and the second metallized via hole passes through the first metallized via hole and penetrates the upper dielectric layer and the first metallized via hole. The upper metal-clad copper layer is connected together to form a high-frequency antenna. The dual-band common-aperture antenna array antenna usually adopts a multi-layer mixed-voltage microstrip antenna form, which has a complex feed network, high processing accuracy, and difficult to realize. high cost

And limited by the size of the microstrip antenna, the distance between the antenna elements is large, which cannot meet the large-angle scanning, and the low isolation cannot meet the electromagnetic compatibility requirements of the radar.

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