Title :
A single-layer CPW-fed active patch antenna
Author :
Ip, Kenneth H Y ; Kan, Tommy M Y ; Eleftheriades, George V.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
2/1/2000 12:00:00 AM
Abstract :
A single-layer CPW-fed active patch antenna oscillator at 2.76 GHz is presented. The patch antenna acts both as a resonator and a radiator. Electromagnetic coupling is utilized for providing the appropriate closed-loop positive feedback. The active antenna is built around a commercially available GaAs MMIC on a low-permittivity εr =2.33 Duroid 5870 substrate. The measured effective isotropic radiated power (EIRP) is 20 dBm, whereas the front-to-back ratio is about 12 dB with the cross-polarized fields better than -15 db. The measured phase noise is -87.5 dBc/Hz at a 100-kHz offset away from the carrier. The structure only requires a single substrate, is compatible with uniplanar technology, and results in a low-component count
Keywords :
MMIC oscillators; UHF antennas; UHF oscillators; active antennas; antenna feeds; antenna radiation patterns; coplanar waveguides; electromagnetic coupling; feedback; microstrip antennas; phase noise; 2.76 GHz; CPW-fed active patch antenna; EIRP; GaAs; GaAs MMIC; active patch antenna oscillator; closed-loop positive feedback; effective isotropic radiated power; electromagnetic coupling; low-component count; low-permittivity Duroid substrate; phase noise; single substrate structure; single-layer patch antenna; uniplanar technology compatibility; Antenna measurements; Electromagnetic coupling; Electromagnetic measurements; Feedback; Field effect MMICs; Gallium arsenide; Noise measurement; Oscillators; Patch antennas; Power measurement;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
