A millimeter-wave slot-V antenna

Abstract

Abstract-A new V-shaped slot antenna built on a dielectric substrate is presented. The antenna is a non-resonant, travelling-wave design, with a predicted impedance in the range from 50R t o €400. Calculations indicate that this antenna should have a gain of 15 dB with 3-dB beamwidths of loo in the H plane and 134'in the E plane. Pattern measurements at QOGHz support the theory. It should be possible t o equalize t h e two beamwidths with a cylindrical lens. The broad bandwidth and high gain characteristics make the slot-V a good candidate for picosecond optoelectronic measurements. Fabrication is simple, and it should be possible to make this antenna a t wavelengths as short as 10pm with conventional photolithography.

Near-field antennas integrated with scanning probes for THz to visible microscopy: scale modeling and limitations on performance

“…For optical wavelengths, however, would be less than 100 nm, which does not yield structures with sufficient mechanical stability. A second possibility to suppress such losses is to sandwich the antenna between two layers of substrate [41], the top cover being much thicker than . This would obviously interfere with the application of this antenna as near-field probe since the near-field region would be removed from the DUT.…”