39th Int. Conf. on Infrared, Millimeter, and THz Waves
September 14-19, 2014
The University of Arizona, Tucson, AZ
M2/B - 2. Radar and Active Probing - 3. Communications I
Monday, September 15, 2014 11:00 am to 12:30 pm
Room: Catalina Room
Chairperson: Tadao Nagatsuma
11:00 am 11:00 am : Sub-millimeter Wave Diode Transceivers
Presenter: Tomas Bryllert

We will present sub-millimeter wave transceiver modules intended for imaging radar applications. In particular a novel circuit architecture that operates in homodyne FMCW radar mode will be highlighted, and the trade-offs between performance and circuit complexity will be discussed. The transceiver units are based on monolithically integrated Schottky diodes fabricated on 3 µm thick membranes. Radar images with 60 dB of signal-to-noise at 220 GHz will be presented as well as design results for a 340 GHz unit.

Author(s):
Tomas Bryllert - Chalmers University of Technology
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11:30 am 11:30 am : Performance Of A 340 GHz Radar Transceiver Array For Standoff Security Imaging
Presenter: Ken Cooper

JPL has developed an eight-element radar transceiver array operating at 340 GHz with a 9% bandwidth. The array elements were fabricated using an unconventional stack of micromachined silicon wafers to house the transceiver's submillimeter-wave diode frequency multipliers and mixers. Here we report on the performance assessment of the array elements and present radar images that showcase its potential for enabling video-rate standoff security screening.

Author(s):
Ken Cooper - Jet Propulsion Laboratory
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11:45 am 11:45 am : Low-Loss THz Waveguide Bragg Grating Using A Two-Wire Waveguide And A Paper Grating
Presenter: Andrey Markov

We demonstrate a low-loss terahertz waveguide Bragg grating (TWBG) fabricated using a plasmonic two-wire waveguide and a micromachined paper grating for potential applications in THz communications. Two TWBGs were fabricated with different periods and lengths and investigated experimentally. TWBG modal dispersion relations, modal loss, and field distributions were studied numerically. Additionally, low-loss and high-coupling efficiency operation of TWBGs was confirmed.

Author(s):
Andrey Markov - Ecole Polytechnique de Montreal
Guofeng Yan - Ecole Polytechnique de Montreal
Maksim Skorobogatiy - Ecole Polytechnique de Montreal
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12:00 pm 12:00 pm : 120GHz Real-Time Wireless Data Link Based On Schottky Technology
Presenter: Zhe Chen

A real-time wireless data link experiment at a carrier frequency of 120GHz is presented in this paper. Both the receiver and transmitter employ Schottky diode subharmonic mixers as direct frequency up- and down-converters without introducing amplifiers at the first stage of the receiver or at the last stage of the transmitter. The conversion loss of the subharmonic mixer is less than 10dB over 105~135GHz. With a good eye pattern, a 231-1 pseudo random binary sequence (PRBS) at a bit rate up to 12.5Gbit/s was successfully transmitted and received.

Author(s):
Zhe Chen - University of Electronic Science and Technology of China (UESTC)
Bo Zhang - University of Electronic Science and Technology of China (UESTC)
Yong Fan - University of Electronic Science and Technology of China (UESTC)
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12:15 pm 12:15 pm : Terahertz Performance In Atmospheric Turbulence
Presenter: Jianjun Ma

Terahertz (THz) free space signaling through experimental controlled atmospheric turbulence is reported. A THz link at 625 GHz carrier frequency with a maximum data rate of 2.5 Gb/s has been developed. Power attenuation and bit error rate (BER) performance caused by air turbulence are presented and compared with an infrared (IR) link at 1550nm wavelength. Numerical simulation of THz attenuation under different turbulence conditions are shown and compared with experimental data.

Author(s):
Jianjun Ma - New Jersey Institute of Technology
Lothar Moeller - Bell Laboratories/Alcatel-Lucent
John Federici - New Jersey Institute of Technology
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