Title :
A modified half U-slot microstrip patch antennas with shorting wall
Author :
Nandgaonkar, A.B. ; Deosarkar, S.B. ; Shirbahadurkar, S.D.
Author_Institution :
Dr. Babasaheb Ambedkar Technol. Univ., Lonere
fDate :
April 30 2007-May 2 2007
Abstract :
The major limitations of microstrip antennas (MSAs) are their narrow impedance bandwidth, small gain and low power handling capability. A half U-slot MSA with shorting wall has been designed and experimentally verified. Its center frequency is observed at 2.66 GHz. The bandwidth is 688 MHz and percentage bandwidth is 25.6% has been obtained while radiation efficiency is above 94% for the operating band. A novel design for increasing the bandwidth of a rectangular patch antenna is introduced and implemented. The design concept involves cutting an extra slot on a half U-slot MSA with shorting wall loading. This new design is very useful since it improves the bandwidth of a traditional U-slot patch antenna with an advantage of reduction in size. Measured VSWR bandwidth of 20 % and average gain of 7 dBi have been achieved. The efficiency is above 95% in the entire operating range.
Keywords :
bandwidth allocation; microstrip antennas; slot antennas; VSWR bandwidth; bandwidth 688 MHz; frequency 2.66 GHz; modified half U-slot microstrip patch antennas; narrow impedance bandwidth; radiation efficiency; rectangular patch antenna; shorting wall; Bandwidth; Dielectric substrates; Fabrication; Feeds; Frequency; Geometry; Impedance; Microstrip antennas; Patch antennas; Probes;
Conference_Titel :
Sarnoff Symposium, 2007 IEEE
Conference_Location :
Nassau Inn, Princeton, NJ
Print_ISBN :
978-1-4244-2483-2
DOI :
10.1109/SARNOF.2007.4567369
