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This paper presents for the first time the design, fabrication and characterization of a GaAs membrane supported millimeter wave receiver that monolithically integrates a Yagi-Uda antenna with a Schottky diode. The design approach includes intensive electromagnetic simulation and modeling. The fabrication processes is based on GaAs micromachining and the Schottky diode is monolithically integrated...
Efficient and wide band frequency conversion using a finline with a silicon substrate has been discussed. Laser pulses move along the finline as generating an electron-hole plasma at the surface of silicon in the fins. The plasma acts as a rf-short moving at a relativistic speed, reflecting an incident wave and up-shifting its frequency through the double Doppler effect. The theoretical results have...
A statistic channel model, TSV-model: Shoji, Sawada, Saleh (Triple S), and Valenzuela model, was newly developed to design 60-GHz band wireless personal area network systems. Shoji and Sawada newly developed a statistic two- path channel model to express sensitive device- position-dependent fading inherent to mmW WPAN system and combined it with the statistic S-V model which had been commonly used...
Each region of the electromagnetic spectrum has unique applications as measurement/diagnostic tools. We compare, in this paper, the millimeter wave (mm-wave) region with the THz region mainly in terms of spectroscopy and imaging using actual examples. The THz region provides more capability in spectroscopy, and in imaging technologies through materials the mm- wave region has advantage. Practical...
The 3D vectorial Gaussian beam tracing method is used to model a short 62.4-GHz link in a simple urban environment. First the Gabor expansion method with a wide-waisted window function is utilized to expand the known far field pattern of the transmitter antenna into a set of Gaussian beams and then these beams are propagated in space until they impinge on a building wall or ground, on which a phase...
A branch-line, rat-race and a reduced-size branch-line coupler have been realized in a modern SiGe:C bipolar technology for application in automotive radar systems at 77 GHz. The paper describes the design methodology of passive circuits on lossy Si-based substrate up to 110 GHz and gives measurement results of the manufactured circuits.
A rectangular waveguide compatible NRD guide E-plane bandpass filter is proposed for millimeter wave OFDM applications. The NRD guide E- plane bandpass filter is constructed by inserting a metal foil array in the E-plane of NRD guide. Simulation, fabrication, and handling of the filter are not difficult because each resonator is constructed by a couple of metal foils of a simple shape. A Chebyshev...
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