Title :
On radiation from circular microstrip disk with a slot
Author :
Bhatnagar, D. ; Bhardwaj, V. ; Tiwari, V.K. ; Saini, J.S. ; Sharma, K.B. ; Kumar, P.
Author_Institution :
Dept. of Phys., Rajasthan Univ., Jaipur, India
fDate :
Oct. 28 2003-Nov. 1 2003
Abstract :
The mode dependent study on the radiation properties of a CMDS i.e. circular microstrip disk antenna having a slot (slot angle /spl beta/) is carried out theoretically in this paper by applying a cavity model based model expansion technique. Expressions for mode dependent far-field patterns, bandwidth, total quality factor, directivity and radiation efficiency of this antenna are obtained and computed in TM/sub nm/ mode of excitation. These computations are first validated by comparing computed far-field patterns of the CMDS radiator having /spl beta/=0/spl deg/ with simulated far-field patterns for a disk radiator. After successful validation, TM/sub 11/ mode theoretical radiation patterns of CMDS having /spl beta/=12/spl deg/ are drawn in E and H plane. Bandwidth, total quality factor, directivity and radiation efficiency values of this antenna are also obtained by considering three /spl beta/ values, which results in three different disk geometries.
Keywords :
Q-factor; antenna radiation patterns; microstrip antennas; slot antennas; antenna bandwidth; antenna directivity; antenna radiation efficiency; circular microstrip disk antenna; disk radiator; excitation mode; mode dependent far-field patterns; model expansion technique; radiation properties; slot; total antenna quality factor; Antenna feeds; Bandwidth; Equations; Geometry; Microstrip antennas; Microwave theory and techniques; Physics; Q factor; Slot antennas; Solid modeling;
Conference_Titel :
Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-7831-8
DOI :
10.1109/ISAPE.2003.1276643
