Title :
An active patch antenna topology based on negative resistance FET oscillator design
Author :
Karacaoglu, U. ; Aujla, N.S. ; Robertson, I.D. ; Watkins, J.
Author_Institution :
Communications Research Group, Dept. of Electronic & Electrical Engineering, King´´s College London, Strand, London, UK, WC2R 2LS. Tel +44(0)71 873 2523 Fax +44(0)71 836 4781
Abstract :
An active microstrip patch antenna topology is presented which is based on the design principles of FET negative resistance oscillators. The patch operates both as a radiating element and as a one-port resonator for stabilising the oscillation frequency of the FET. The new technique has been compared experimentally at 9.6 GHz with the previously reported technique in which the patch is used as a two-port feedback element for the FET, and the new technique is found to give much improved radiation characteristics.
Keywords :
Antenna radiation patterns; Circuit topology; Degradation; Electric resistance; FETs; Feedback loop; Microstrip antennas; Oscillators; Patch antennas; Resonant frequency;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336750
