Broadband ultralow-profile dual-polarized antenna

Abstract

The invention discloses a broadband ultra-low profile dual polarized antenna. Comprising an antenna housing layer, a four-ridge opening waveguide array layer, an x-axis polarization suspended strip line feed network layer, an electromagnetic wave polarization selection waveguide layer, a y-axis polarization suspended strip line feed network layer and a bilateral double-ridge waveguide resonant cavity layer which are sequentially stacked from top to bottom. According to the dual-linearly-polarized flat satellite antenna, the working bandwidth of the dual-linearly-polarized flat satellite antenna is widened, 34% of center bandwidth (FBW) is achieved in microwave and millimeter wave bands, the contour height of the antenna is reduced to be smaller than 25 mm, and the radiation efficiency of the antenna unit reaches 92% or above.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a low-profile height, wide-band (10.5-14.8GHz), dual-polarized flat panel satellite communication antenna, which is suitable for fixed installation or mobile carriers (such as vehicle-mounted, air-borne, ship-borne etc.) assembled satellite communication antennas. Background technique [0002] Satellite communication uses artificial earth satellites as relay stations to forward radio waves, thereby realizing communication between two or more earth stations. It has the advantages of multiple access function, wide coverage, good communication stability and high quality. Satellite communication plays a vital role in scenarios with vast sparsely populated areas, such as various ships in the ocean, deserts or grasslands, and areas with imperfect terrestrial communication facilities such as rugged mountains and hills. With the rapid development of ground communi...

AI Technical Summary

Problems solved by technology

Its radiating layer adopts a horn-shaped waveguide with the characteristics of an inward inclined surface. This design makes the overall profile height of the antenna relatively thick, and the large-sized horn radiation port makes the antenna radiation pattern have higher side lobes; later, the company In the patent PCT / KR2008 / 003036, it is proposed to install a metal grid on the surface of the horn waveguide to reduce the side lobe, but this design further increases the product complexity and production cost

IDOIT uses waveguide feed networks in all of its patents for planar waveguide array antennas. The electromagnetic channels of these waveguide networks are designed to be extremely narrow, resulting in limited operating bandwidth. The height of the overall antenna profile is further increased

The planar waveguide array antenna published by German QEST company in patents PCT / EP2010 / 002645 and PCT / EP2013 / 001923 has multiple steps designed in the radiation horn, which makes the impedance matching between the antenna and the air better and expands the bandwidth; then The company further uses suspended microstrip lines and waveguide networks in the patent PCT / EP2013 / 001939 for dual-polarization feeding, which has a complex structure and a large overall thickness

[0005] The University of Electronic Science and Technology of China announced a broadband dual circularly polarized planar waveguide array antenna in patent CN106356640B, including radiation apertures, resonant cavities, feeding square waveguides, circular polarizers, and dual-polarized feeding Network and standard waveguide transition interface, its -10dB central bandwidth is 16%, the antenna efficiency is about 60%, its horizontal polarization and vertical polarization are both fed by waveguide, resulting in a large profile height

Nanjing Antiana Communication Technology Co., Ltd. announced a dual-polarized transceiver shared waveguide array antenna in the patent CN107871935A. From top to bottom, it is a radiation waveguide horn, a vertically polarized waveguide feed network, and a horizontally polarized waveguide feed network. , an orthogonal mode converter, but the operating bandwidth of this scheme is relatively narrow, and the overall profile height is not satisfactory

Images