Compact and highly directional broadband tem horn antenna

Abstract

The present invention provides a compact high-directivity wideband TEM horn antenna, comprising: a TEM horn antenna and a feed port, wherein the TEM horn antenna comprises two arms of a traditional TEM antenna and a low-frequency-compensation short circuit back plate, and an inner core and an outer conductor of the feed port are connected to the two arms of the TEM antenna respectively. The compact high-directivity wideband TEM horn antenna of the present invention is simple in structure and low in manufacturing cost, can realize a very wide operating frequency band and stable directional radiation on the premise of guaranteeing the size, and can meet the requirements of ground penetrating radars under different conditions and requirements for system miniaturization, thereby having wide application prospects.

Description

technical field [0001] The present invention relates to a TEM horn antenna, in particular to a compact and highly directional broadband TEM horn antenna, especially a broadband directional TEM horn antenna with low-frequency compensation, which works in the VHF / UHF frequency band, has a stable pattern, and can be applied in the field of ground penetrating radar. Background technique [0002] In the prior art, ground-penetrating radars use symmetrical array antennas such as dish antennas. The size of such antennas is usually half of the wavelength. At the same time, a back cavity needs to be added to ensure the directional radiation of the antenna. The bandwidth of this type of antenna is limited. There are also standard horn antennas or TEM horns, but the size and wavelength are comparable, and the total volume of the antenna is very large. [0003] After literature search, it is found that the patent application number is 201020599359.2, and the patent name is: an ultra-wi...

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Problems solved by technology

There are also standard horn antennas or TEM horns, but the size and wavelength are comparable, and the total volume of the antenna is large

[0003] Through literature search, it is found that the patent application number is 201020599359.2, and the patent name is: an ultra-wideband curved surface TEM horn antenna. The patent publication number is CN201956462U. This antenna is used in ultra-wideband radar systems. It is still the conventional size of the TEM horn, and at the same time, it is more sensitive to deformation due to the higher requirements for the machining accuracy of the curves of the two arms of the TEM.

[0004] In the search, it was also found that in 2014, Turniger et al. published "Research and Design of Ultra-Wideband TEM Horn Antenna with Low-frequency Compensation" in the 8th issue of Volume 14 of the "Science Technology and Engineering" journal. The operating frequency can be reduced to a lower level under the condition of daring to increase the size, but it cannot guarantee the stable directional radiation of the low frequency part, which is not suitable for the actual working requirements of the ground penetrating radar system.

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