220 GHz outdoor wireless communication system based on a Schottky-diode transceiver

Abstract

In this paper, an all-electronic outdoor wireless communication system based on a Schottky-diode transceiver at 220 GHz is reported. The transceiver is implemented by the use of in-house designed 220 GHz lownoise Schottky diode-based subharmonic mixers (SHMs), which simplifies the system setup and demonstrates the feasibility of Schottky technology for terahertz (THz) communication. The system setup, performance of critical components and link budget calculation are presented. The wireless link quality is evaluated in terms of the error vector magnitude (EVM). 3.52 Gbit/s real-time three-dimension (3D) glass-free video transmission is achieved over an outdoor distance of 200 m by the use of quadrature phase shift keying (QPSK) modulation.

Secrecy performance of terahertz wireless links in rain and snow

“…In the calculation, outdoor links with carriers at 140, 220 and 340 GHz are considered (which has been achieved in [62][63][64][65]) and assumed to be collimated with the same beam width. The FOV angles of Eve for both links are set to be 15° and the receiving areas for Bob and Eve are all 1cm 2 , which are all chosen in the following calculations.…”

Invited Article: Channel performance for indoor and outdoor terahertz wireless links

“…76 We performed preliminary outdoor measurements by transferring the experimental apparatus outside. 9,36 These measurements have been performed under the authority of an experimental license issued by the Federal Communications Commission (FCC), which covers outdoor operation of a transmitter at any of the frequency bands described here. Both the transmitter and receiver were mounted on tripods for easy repositioning, with the same beam height of 1.35 m. To extend the link range, we used a double-pass configuration as shown in Fig.…”

Four‐hundred gigahertz broadband multi‐branch waveguide coupler

“…The terahertz wave has the characteristics of high temporal and spatial coherence, low photon energy, strong penetration ability, large communication transmission capacity, fast wireless transmission rate and high resolution. Therefore, the terahertz wave has great potential to be used in detection technology, imaging and detection system, Internet of Things, communication, astronomy, security inspection and other fields [3][4][5][6][7][8][9][10][11][12][13]. More scientific applications of the terahertz wave are still being studied and developed, and its broad scientific prospects are attracting worldwide attention and expectations.…”