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Terahertz beam two-dimensional mechanical scanning antenna feed system

A terahertz beam two-dimensional, mechanical scanning technology, applied in the field of terahertz beam two-dimensional mechanical scanning antenna-feeder system, to achieve the effects of high gain, good voltage standing wave ratio, and accurate beam positioning

Inactive Publication Date: 2014-07-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of two-dimensional beam mechanical scanning. Based on the principle of horn antenna and reflector antenna, a terahertz beam two-dimensional mechanical scanning antenna feed system designed with biased Cassegrain antenna as the main body is proposed.

Method used

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  • Terahertz beam two-dimensional mechanical scanning antenna feed system

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Depend on figure 1 It can be seen that the present invention includes a biased Cassegrain antenna, a feed antenna 15 , a servo control system, a main reflector support 10 , a secondary reflector support 11 , a flange 3 and an indicator pin 14 . Among them, the offset Cassegrain antenna includes a main reflector 1 and a secondary reflector 2, the material is aluminum, and the surface is gold-plated; the servo control system includes azimuth and pitch two-dimensional turntable 4, servo controller 8 and turntable base 9; azimuth . The pitch two-dimensional turntable includes an azimuth control module 5 , a pitch rotation motor 6 and a pitch angle encoder 7 . The feed antenna 15 is made of copper with a gold-plated surface; the servo control system is made of hard aluminum with a blackened surface.

[0032] Depend on figure 2It...

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Abstract

The invention relates to a terahertz beam two-dimensional mechanical scanning antenna feed system, and belongs to the technical field of antennas. The system comprises a biasing cassegrain antenna, a feed source antenna, a servo control system, a main reflecting surface support, an auxiliary reflecting surface support, a flange plate and an indication pin, wherein the biasing cassegrain antenna comprises a main reflecting surface and an auxiliary reflecting surface, the servo control system comprises an orientation and pitching two-dimensional rotary table, a servo controller and a rotary table base, and the orientation and pitching two-dimensional rotary table comprises an orientation control module, a pitching rotating motor and a pitching angle encoder. The system operates within a frequency band of 110 GHz-600 GHz, characteristics of the voltage standing wave ratio are good, gain is high, and a beam scanning mode is within the range of horizontal and pitching + / - 20 degrees; self-defining scanning traces can be achieved, and beams are accurately positioned. The system serves as an indispensable part of a terahertz imager, can be matched with the terahertz imager to set up a terahertz imaging system and makes important contributions to the public security field.

Description

technical field [0001] The invention relates to a terahertz beam two-dimensional mechanical scanning antenna feed system, which belongs to the technical field of antennas. Background technique [0002] Terahertz imaging has obvious advantages over other wave bands because of its short wavelength, high transmittance, and no damage to the human body. Terahertz imaging technology is bound to play an irreplaceable role in future security checks, anti-terrorism, and anti-drugs. In recent years, there have been examples of terahertz imaging technology successfully applied to security inspection equipment abroad, and my country has gradually carried out research on terahertz security inspection imaging systems. As the front end of the imaging system, the terahertz antenna feed system is an essential part of the entire imaging system. The performance of the antenna feed system will directly determine whether the imaging system can play its due role. [0003] Based on the mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/08H01Q19/18
Inventor 刘埇李斌卢宏达赵鹏飞水孝忠张雨濛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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