Title :
Electronically tunable microstrip patch antennas
Author :
Al-Charchafchi, S.H. ; Frances, M.
Author_Institution :
Coll. of Aeronaut., Cranfield Univ., Bedford, UK
Abstract :
This paper presents the performance of a varactor loaded, probe-fed microstrip patch antenna. An effective impedance bandwidth of 50% is achieved centred around a frequency of 2.20 GHz. The simple transmission line model is used to predict the resonant frequency, and practical results obtained showed a good agreement between the predicted and measured values.
Keywords :
antenna feeds; antenna testing; impedance matching; load (electric); microstrip antennas; probes; transmission line theory; tuning; varactors; 2.2 GHz; UHF; antenna design; electronically tunable microstrip patch antennas; frequency; impedance bandwidth; impedance matching; measured values; performance; predicted values; probe-fed microstrip patch antenna; resonant frequency; transmission line model; varactor loaded antenna; Antenna measurements; Bandwidth; Frequency measurement; Impedance; Microstrip antennas; Patch antennas; Predictive models; Resonant frequency; Transmission line measurements; Varactors;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.699140
