Photoconductively switched antennas for measuring target resonances
Abstract
Coplanar-strip horn antennas are switched photoconductively to generate picosecond bursts of freely propagating electromagnetic energy with bandwidth covering 15-75 GHz. The antennas are fabricated on GaAs grown by molecular beam epitaxy at low substrate temperatures. These antennas are used to perform transient scattering measurements from slit-coupled circular and coaxial cavities; Prony's method [IEEE Trans. Antennas Propagat. 23, 777 (1975)] is used to extract cavity resonances from the measured late-time scattered signal.
- Publication:
-
Applied Physics Letters
- Pub Date:
- April 1994
- DOI:
- Bibcode:
- 1994ApPhL..64.2178R
- Keywords:
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- Antennas;
- Electromagnetic Wave Transmission;
- Gallium Arsenides;
- Horn Antennas;
- Photoconductivity;
- Planar Structures;
- Resonance;
- Semiconductors (Materials);
- Cavity Resonators;
- Fabrication;
- Molecular Beam Epitaxy;
- Scattering;
- Signal Processing;
- Waveguides;
- Electronics and Electrical Engineering