Design of detection terminal for active millimetre-wave imaging

• Main Authors: Hanxue Mei, Jinbang Wang, Tao Zhang, Zhiguo Liu
• Format: Article
• Language: English
• Published: Wiley 2019-08-01
• Series: The Journal of Engineering
• Subjects: design engineering; power supplies to apparatus; operational amplifiers; electromagnetic actuators; millimetre wave imaging; low-pass filters; magnetostrictive devices; amplifiers; frequency 100.0 khz; active millimetre-wave imaging; low-pass filter amplifying circuit; op27 circuit; operational amplifier op27; millimetre-wave signal; detection unit; detection terminal
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0265

The diode is used as the detection unit to receive the millimetre-wave signal directly. A circuit is made with an operational amplifier OP27 to amplify the signal. The magnification of the OP27 circuit is stable at 100 <100 kHz. The performances of the detection terminal and the low-pass filter amplifying circuit are compared in different distance between the source and the diode with a polarisation angle of 70°. The result shows good sensitivity of the detection terminal in active millimetre-wave imaging. A one-dimensional imaging test on the detection terminal is performed.