Title :
A 90-100 GHz double-folded slot antenna
Author :
Gauthier, Gildas P. ; Raman, Sanjay ; Rebeiz, Gabriel M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
A double-folded slot antenna (DFS) has been designed, fabricated, and tested at 90-100 GHz. The antenna shows a very wideband impedance around 20 Ω from 85 to 110 GHz. The low impedance is compatible with superconductor-insulator-superconductor (SIS) junctions, Schottky diodes or high electron mobility transistor (HEMT) amplifiers, which require a low impedance at millimeter wave frequencies. The antenna is placed on a dielectric lens to synthesize a semi-infinite substrate and realize high-directivity patterns. The measured radiation patterns agree very well with theoretical calculations and demonstrate symmetric main beams and sidelobe levels below -15 db over a 10% bandwidth. The double folded slot antenna is an attractive candidate for low-cost wideband millimeter-wave monolithic microwave integrated circuits (MMIC) front ends
Keywords :
antenna radiation patterns; antenna testing; directive antennas; electric impedance; millimetre wave antennas; slot antennas; 90 to 100 GHz; HEMT amplifiers; MMIC front ends; SIS junctions; Schottky diodes; dielectric lens; double-folded slot antenna; high electron mobility transistor amplifiers; high-directivity patterns; low impedance; millimeter wave frequencies; millimeter-wave monolithic microwave integrated circuits front ends; radiation patterns; semi-infinite substrate; sidelobe levels; superconductor-insulator-superconductor junctions; symmetric main beams; wideband impedance; Broadband antennas; Dielectric substrates; HEMTs; Impedance; Josephson junctions; MMICs; Millimeter wave measurements; Millimeter wave transistors; Slot antennas; Testing;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
