Research Information System
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol.49, no.2, pp.298-302, 2007 (SCI-Expanded)
The design of broadband active-compensated antenna system is an important problem in commercial satellite, military, and high-speed communication systems. And so, impedance matching networks are used extensively in radio transmission and receiving systems. In this paper, broadband impedance Matching is proposed as a method to improve the matching level of microstrip antennas. The theoretical design, fabrication, and experimental implementation of compensated rectangular microstrip antenna with new configuration pi-matching network were presented. A new compensation network consisting of RC mutator circuit and discrete capacitors are employed at the input of the microstrip antenna operating at 2.5 GHz. The performance parameters of the designed microstrip antenna with and without compensation network were compared. The results show that compensation network can improve the return loss level from - 5.9 to - 13.01 dB and the resonant frequency can be controlled in a wide RF band. (c) 2006 Wiley Periodicals, Inc.