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

fYear

2003

fDate

Oct. 28 2003-Nov. 1 2003

Firstpage

120

Lastpage

123

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on

Conference_Location

Beijing, China

Print_ISBN

0-7803-7831-8

Type

conf

DOI

10.1109/ISAPE.2003.1276643

Filename

1276643