Low section compact dual-band dual-polarization common aperture microstrip antenna

Abstract

The invention provides a low section compact dual-band dual-polarization common aperture microstrip antenna which is formed by two layers of double-face copper clad microwave dielectric plates. The needed double-frequency antenna array and Ku band antenna feed network are formed on the upper surface of the upper layer dielectric plate through etching process, and an L type coupling slot is arranged on a grounded plate at the lower surface of the upper layer dielectric plate. A Ka band antenna feed network is at the lower layer of the lower layer dielectric plate, and the antenna is subjected to coupled feeding through the slot. Two frequencies of the antenna coverage are a Ka band and a Ku band. According to the antenna, through the reasonable array layout, a Ka band antenna and a Ku band antenna are in coplanar nested placement in a same aperture, the structure is compact, the feed network of the antenna is hierarchically designed, and the wiring space is relatively abundant. The antenna can be applied to a satellite communication terminal of Ku and Ka bands.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a low-profile, compact, dual-band, dual-polarized co-aperture microstrip antenna array. Background technique [0002] In order to solve the antenna's requirements for low profile, compact structure and multi-band multi-polarization coverage, the common-aperture microstrip antenna array has become a trend. At present, most of the common-aperture antennas widely used at home and abroad use waveguide slot antennas or stacked structures to achieve common-aperture, and the polarization forms are all linear polarization. [0003] The common-aperture antenna in the patented L / S / X three-band dual-polarized planar antenna array (CN201010275940.3) consists of a pair of L / S, L / X dual-band dual-polarization sub-arrays and L single-band dual-polarization sub-arrays. Each sub-array is a multi-layer laminated structure with a complex structure and does not involve higher frequencies. A dual-...

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Problems solved by technology

[0003] The common-aperture antenna in the patented L / S / X three-band dual-polarized planar antenna array (CN201010275940.3) consists of a pair of L / S, L / X dual-band dual-polarization sub-arrays and L single-band dual-polarization sub-arrays. Array splicing, each sub-array is a multi-layer laminated structure, the structure is complex, and does not involve higher frequencies

A dual-frequency dual-polarization antenna (CN201110130936.2) consists of a high-frequency dipole array and a low-frequency dipole array antenna, which does not meet the low-profile requirements

Ku-band low-profile dual-frequency dual-polarized array antenna (CN201110109938.3) is composed of a multi-layer sandwich structure composed of eight layers, which is not easy to realize, and it is a dual-line polarized antenna that only covers the Ku-band

Miniaturized single-feed point dual-frequency dual-polarization microstrip antenna (CN200910251045.5) introduces a microstrip antenna that realizes dual-frequency circular polarization, has the characteristics of small size, low profile, simple manufacturing process, and low cost. Good axial ratio bandwidth and high low elevation gain, can be used for high-performance satellite navigation system receivers, dual-frequency dual-polarization slotted microstrip antenna (CN03210325.5), the invention has dual-frequency dual circular polarization transceiver function, the antennas in the above two inventions use probes for direct or coupled feeding, which cannot meet the requirements of antenna arrays to achieve high gain

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