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Common-antenna terahertz active radar imaging array

An active radar and imaging array technology, applied in the field of terahertz imaging, can solve the problems of occupying a large chip area and increasing the risk of tape-out processing cost design, and achieve cost reduction, mass production, and cost reduction.

Pending Publication Date: 2019-08-09
TIANJIN UNIV
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Problems solved by technology

However, this will greatly increase the cost of tape-out processing and the risk of design due to the presence of the transceiver antenna array at the same time occupying a large amount of chip area.

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] In order to illustrate the technical solution of the present invention more clearly, the present invention will be further described by taking an array size of 4×4 as an example below in conjunction with the accompanying drawings.

[0021] Figure 1-2 For the traditional TDD terahertz radar imaging structure, the transmitting antenna array is located at 100 to the left of the local oscillator 300 , and the receiving antenna array is located at 200 to the right of the local oscillator. Among them, the array element 10 of the transmitting antenna array 100 is composed of a transmitting antenna 1 and a transmitting (Transmitter, referred to as "Tx") circuit, and the receiving ante...

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Abstract

The invention discloses a common-antenna terahertz active radar imaging array, which comprises an antenna array arranged at one side of a local oscillator and can operate under a receiving and / or transmitting mode, switching among a receiving mode, a transmitting mode and a transmitting-receiving operation mode of completing transmitting and receiving functions is realized through controlling thebias voltage of a transmitting link or a receiving link of the common antenna forming an array element of the antenna array, and thus, the antenna array can be used as a transmitting array mode, a receiving array mode or a transmitting-receiving array mode. On the premise of not changing the imaging scale and not affect normal operation of the transmitting link and the receiving link, the use number of antenna arrays is reduced, the chip area utilization rate is improved, and the processing cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of terahertz imaging, in particular to a terahertz active radar imaging array with a common antenna, and in particular to a structure of a shared antenna for the transmitting and receiving links of the terahertz radar imaging array. Background technique [0002] Terahertz wave is an electromagnetic wave between microwave and infrared light on the electromagnetic spectrum, its frequency is about 0.1-10THz, and its wavelength corresponds to 3mm-30μm. Terahertz technology is one of the frontier and hot areas of information science and technology research. In recent years, it has received extensive attention from research institutions around the world. Due to the high frequency of terahertz, it has a high signal-to-noise ratio in the time-domain spectrum, and different objects absorb terahertz frequencies differently, resulting in different spectral characteristics. Therefore, terahertz technology is in...

Claims

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Application Information

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IPC IPC(8): G01S7/481
CPCG01S7/4811
Inventor 马凯学张蕾傅海鹏
Owner TIANJIN UNIV
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