Title :
CPW-fed active slot antennas
Author :
Kormanyos, Brian K. ; Harokopus, William, Jr. ; Katehi, Linda P B ; Rebeiz, Gabriel M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
4/1/1994 12:00:00 AM
Abstract :
We have combined microwave oscillator design with theoretical characterization of planar antennas to build active slot-oscillators. The design is uniplanar, does not require via holes and is compatible with monolithic transistor technology. The coplanar waveguide (CPW) fed antenna impedance is calculated using the space domain integral equation technique (SDIE), a full wave method of moments approach. Slot-oscillators were built at 7 GHz and 20 GHz and the predicted oscillation frequencies agree well with experiments. The 20 GHz medium power oscillator has an output power of 17 mW and a DC to RF efficiency of 14%. The design is easily scaled to millimeter-wave frequencies and can be extended to power combining arrays
Keywords :
active antennas; antenna feeders; integral equations; microwave antennas; numerical analysis; slot antennas; 14 percent; 17 mW; 20 GHz; 7 GHz; CPW-fed active slot antennas; DC to RF efficiency; active slot-oscillators; full wave method of moments; medium power oscillator; microwave oscillator design; millimeter-wave frequencies; planar antennas; power combining arrays; space domain integral equation technique; Coplanar waveguides; Frequency; Impedance; Integral equations; Microwave oscillators; Microwave transistors; Moment methods; Planar arrays; Slot antennas; Space technology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
