Infrared and Laser Engineering, Volume. 50, Issue 5, 20210202(2021)
340 GHz wireless communication receiving front-ends based on AlGaN/GaN HEMT terahertz detectors
Fig. 1. (a) Schematic diagram of AlGaN/GaN HEMT terahertz detector; (b) Actual picture of AlGaN/GaN HEMT terahertz detector; (c) Equivalent circuit of AlGaN/GaN HEMT terahertz detector; (d) Homodyne-detection responsivity of the detector in the band of 334-343 GHz; (e) Homodyne-detection responsivity as a function of the received power
Fig. 2. Block diagram of homodyne transmitter-transceiver chain based on AlGaN/GaN HEMT terahertz detector
Fig. 3. SNR of the homodyne receiver as a function of the received power with different receiver bandwidths
Fig. 4. (a) Transmitted and received waveforms without nonlinear compensation; (b) Transmitted and received waveforms with nonlinear compensation
Fig. 5. Block diagram of heterodyne transceiver system based on AlGaN/GaN HEMT terahertz detector
Fig. 6. SNR of the heterodyne receiver as a function of the received power with different signal bandwidths
Fig. 7. Waveforms of the base-band signal and the IF signal with a local terahertz power of 0 dBm and a signal bandwidth of 10 MHz
Fig. 8. SNR as a function of the receiver bandwidth for the two different receivers with the same received power of −11 dBm
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Yuxuan Lian, Wei Feng, Qingfeng Ding, Yifan Zhu, Jiandong Sun, Hua Qin, Kai Cheng. 340 GHz wireless communication receiving front-ends based on AlGaN/GaN HEMT terahertz detectors[J]. Infrared and Laser Engineering, 2021, 50(5): 20210202
Category: Optical devices
Received: Apr. 12, 2021
Accepted: --
Published Online: Aug. 13, 2021
The Author Email: Qin Hua (hqin2007@sinano.ac.cn)