Modified slot antennas on high-permittivity substrates for the millimeter-wave range
We consider the possibility of manufacturing a planar antenna on the dielectric layer with high permittivity, which is intended for a monolithic planar detector of the millimeter-wave range. The previous design of the slot antenna on a foil-cladded dielectric with low permittivity (ε = 2.2) is analyzed. The simulation results show that a transition from the substrate with low dielectric permittivity to a semi-insulating GaAs substrate (ε ≈ 13) with the directivity kept at a level of about ∼10 at the resonant frequency is possible for antennas with external sizes comparable with the wavelength. The parameters of the planar detectors on semi-insulating GaAs substrates in the 3-mm wavelength range (94–97 GHz) were measured. Directional patterns of the planar antennas at the resonant frequencies reasonably coincide with the calculated data.
KeywordsDielectric Layer GaAs Substrate Directional Pattern Planar Detector Slot Antenna
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