Title :
Tuning stubs for microstrip-patch antennas
Author :
Du Plessis, Monuko ; Cloete, J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Stellenbosch Univ., South Africa
Abstract :
A practical method for the simultaneous tuning, of both the resonant frequency and reflection coefficient, of a coaxially fed rectangular-microstrip patch is described. The use of two tuning stubs allows independent adjustment of the effective patch length and the effective position of the feed point. The effective length determines the resonant frequency of the patch, while the effective position of the feed point determines the input impedance. It is demonstrated that the method allows the adjustment of the feedpoint reflection coefficient of a patch to less than -60 dB, at a frequency which is within 0.005% of specification.<>
Keywords :
antenna feeds; antenna testing; electric impedance; microstrip antennas; tuning; coaxially fed rectangular-microstrip patch; effective feed point position; effective patch length; input impedance; microstrip-patch antennas; reflection coefficient; resonant frequency; tuning stubs; Africa; Antenna feeds; Coaxial components; Impedance; Microstrip antennas; Reflection; Resonance; Resonant frequency; Transmission lines; Tuning;
Journal_Title :
Antennas and Propagation Magazine, IEEE
