Title :
Active cavity-backed slot antenna using MESFETs
Author :
Moyer, H.P. ; York, R.A.
Author_Institution :
Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
An active cavity-backed slot antenna for quasi-optical arrays is described. A packaged GaAs MESFET with a coplanar matching network was used for the oscillator circuit. This configuration yields the expected slot antenna radiation pattern with a compact layout, low cross-polarization, and increased directivity due to the cavity backing. The measured patterns with cavity backing show a significant improvement compared with the same oscillator without cavity backing.<>
Keywords :
Schottky gate field effect transistors; active antennas; antenna radiation patterns; cavity resonators; slot antennas; solid-state microwave circuits; GaAs; MESFET; active cavity-backed slot antenna; coplanar matching network; low cross-polarization; microwave antennas; oscillator circuit; quasi-optical arrays; radiation pattern; Circuits; Coplanar waveguides; Dielectric substrates; FETs; MESFETs; Microstrip antenna arrays; Microwave antenna arrays; Microwave oscillators; Optical arrays; Slot antennas;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
