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Millimeter/Terahertz and nano-optical antennas
10:10 Keynote talk: Terahertz Chip-Scale Systems
Kaushik Sengupta
Princeton University (USA)
In this talk, we will discuss how new design approaches crosscutting circuits/EM/systems partitions, to open new possibilities in enabling programmability and adaptability in these THz chip technologies including programmable chip-scale THz sensors, THz metasurfaces and spatio-temporal control of THz fields for physical layer security, and how these can enable new applications in sensing, imaging, security and localization.
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10:40 Invited talk: Non Conventional Reflectarray and Transmitarray Configurations \\ for Next Generation Applications
Paola Pirinoli
Politecnico di Torino (Italy)
Reflectarrays (RAs) and transmitarrays (TAs) represent an efficient alternative to reflectors and arrays as high-gain antennas, since they posses nice features making them potentially suitable for several different applications. In view of these, some non-conventional, dielectric-only RA and TA configurations are here discussed.
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Tetsuya Kawanishi
Waseda University (Japan)
Terahertz band systems are expected to be a means of achieving short-range, high-speed communications. However, there are concerns about the effects of rain attenuation and wind-induced vibration, and ensuring performance in adverse weather conditions is an issue. In this presentation, a link budget model of terahertz band fixed wireless systems under storm conditions will be presented and the feasibility of a highly stable system will be discussed.
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Safumi Suzuki
Tokyo Institute of Technology (Japan)
The recent progress in resonant-tunneling diode (RTD) THz oscillators and applications is reviewed. For high-frequency and high output power, RTD oscillators integrated with cylindrical and rectangular cavities have been developed. Structure simplified RTD oscillators for easy device fabrication and good uniformity were proposed and fabricated. This simple structure has an extensibility for large-scale array, active metamaterial, and beam forming function. Novel THz radar systems using RTD oscillators were proposed, and a precise distance measurement and a three-dimensional imaging were demonstrated.
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Takashi Tomura, Jiro Hirokawa
Tokyo Institute of Technology (Japan)
This paper presents base station and user equipment antennas for a 60-GHz-band near-field wireless communication system: gigabit access transponder equipment (GATE). The GATE uses electrically large antennas for base stations to provide a uniform field distribution and low interference between adjacent links.
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Ch. Murali Krishna (1), N. Suguna (2), S. Revathi (2)
(1)PDPM IIIT Design and Manufacturing (India) , (2)VIT University (India)
In this paper, novel approach tri - element Multiple - Input Multiple - Output (MIMO) terahertz (THz) antenna is designed to cover wide band characteristics from 2.44 - 3.09THz for medical, short - indoor and THz applications. The proposed MIMO antenna is designed on quartz glass dielectric material within compact size of 120$\mu$m x 60$\mu$m, offers of wide impedance bandwidth (IBW) of 0.65THz, isolation less than -25dB, peak gain 6.82dB and high radiation efficiency of 92 - 98%. The MIMO antenna parameters are envelope correlation coefficient (ECC), diversity gain (DG), total active reflection coefficient (TARC), channel capacity loss (CCL) and mean effective gain (MEG) are within acceptable limits
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Jacqueline Damas (1), Niels Neumann (2), Klaus Wolf (2), Dirk Plettemeier (2)
(1)University of Dar es Salaam Tanzania (Tanzania) , (2)TU Dresden (Germany)
A planar antenna array on the RF substrate increases the level of system integration and lowers the manufacturing cost for such systems. In this paper, the authors present the design and fabrication of a planar 2×2 antenna arrayfor a 60 GHz Radio-over-Fiber (RoF) wireless system. The antenna is radiating at broadside and excited by microstrip line. For the measurement with RF probes on a wafer prober, a microstrip-to-coplanar waveguide transition is added. The measured gain of the antenna is 6 dBi and the matching is better than -20 dB at 60 GHz. The measurement and simulation results of gain and input return loss match very well at the resonance frequency.
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