Title :
Microstrip antennas on localized micromachined dielectric substrates
Author :
Courtay, A. ; Gauthier, G.P. ; Rebeiz, G.M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Micromachining techniques using closely spaced holes have been used underneath a microstrip antenna on a high dielectric constant substrate (/spl epsiv//sub /spl gamma//=10.8) to synthesize a localized low dielectric constant environment (/spl epsiv//sub /spl gamma//=2.3). The bandwidth of a 12.8 GHz microstrip antenna, was improved from 0.8% to 7.8%, and the measured radiation efficiency increased from 40% to 70%. We believe that this technique can be applied to millimeter-wave (30-100 GHz) microstrip antennas on GaAs substrates to result in relatively wideband (4-6%) MMIC active antenna modules for phased-arrays and collision avoidance systems.
Keywords :
active antenna arrays; antenna phased arrays; antenna radiation patterns; antenna testing; micromachining; microstrip antenna arrays; millimetre wave antenna arrays; permittivity; 12.8 GHz; 30 to 100 GHz; 70 percent; GaAs; III-V semiconductor; bandwidth; collision avoidance systems; high dielectric constant substrate; localized micromachined dielectric substrates; low dielectric constant; measured radiation efficiency; micromachining techniques; microstrip antennas; millimeter-wave microstrip antennas; phased arrays; wideband MMIC active antenna modules; Antenna measurements; Bandwidth; Broadband antennas; Dielectric constant; Dielectric measurements; Dielectric substrates; High-K gate dielectrics; Micromachining; Microstrip antennas; Millimeter wave measurements;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549822
