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Proceedings Paper

Design and construction of CPW fed circular microstrip patch antennas
Author(s): Kirti Vyas; P. K. Singhal; A. K. Sharma; Manisha Pal
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Paper Abstract

In this paper, we present feeding approaches of coplanar waveguide fed (CPW) circular microstrip patch antennas, with and without defected ground structure (DGS)`. The antenna feeding impedance is proposed as 50 ohms, built over FR4, a high dielectric constant substrate to obtain broad impedance bandwidth along with stability of the radiation patterns. The antenna with defected ground structure is designed to have band-notched characteristics at 3.5 GHz (for Wi-MAX band-3.3 to 3.7 GHz), at 8.2 GHz (for ITU band-8.025 GHz to 8.4 GHz) so as to avoid interference from these. The FR4 is used as dielectric with value of dielectric loss tangent constant as 0.002 and relative permittivity with 4.4. After applying DGS in ground of the proposed antenna there were improvements concerning bandwidth, and also a small increase in gain was noticed. These antennas are of small sizes with dimensions; 30 mm X 43 mm X 1.6 mm, cheap, compact and easy to fabricate, and achieve good radiation characteristics with higher return loss. This first antenna can have wide application in a great variety of wireless communication and second can operate well as UWB antenna with band notched characteristics. The performance of two antennas is compared in respect to gain, VSWR, return loss and impedance matching.

Paper Details

Date Published: 28 January 2013
PDF: 6 pages
Proc. SPIE 8760, International Conference on Communication and Electronics System Design, 87600J (28 January 2013); doi: 10.1117/12.2010355
Show Author Affiliations
Kirti Vyas, Bhagwant Univ. (India)
P. K. Singhal, MITS (India)
A. K. Sharma, ACEIT (India)
Manisha Pal, JNU (India)

Published in SPIE Proceedings Vol. 8760:
International Conference on Communication and Electronics System Design
Vijay Janyani; M. Salim; K. K. Sharma, Editor(s)

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