P. Otero et al., A MICROSTRIP-COUPLED SLOT-LOOP ANTENNA FOR INTEGRATED RECEIVERS IN THE MILLIMETER-WAVE BAND, Microwave and optical technology letters, 18(2), 1998, pp. 91-95
A square-loop slot antenna, printed at the back surface of an extended
hemispherical lens, is examined as a candidate for millimeter-wave (m
m-wave) integrated-circuit Schottky-diode mixers. The loop slot is etc
hed in a microwave substrate, and coupled to a microstrip line section
printed on the other side of the substrate. A Schottky barrier diode
shunted to ground is the mixing device. The input impedance of the ant
enna has been optimized to conjugate match the Schottky diode. To desi
gn and optimize the antenna, an efficient full-wave method of moments
(MoM) technique, which solves the mixed potential integral equation (M
PIE) in the stratified medium, has been developed. patterns have been
computed using the physical optics approximation and diffraction theor
y. The proposed configuration shows very wideband performance. Simulat
ion results compare well with measurements. The proposed configuration
is suitable to be scaled down for operation in the submillimeter-wave
(submm-wave) band. (C) 1998 John Wiley & Sons, Inc.