An inset-fed circular shaped microstrip patch antenna and pair of inverted T-shaped slits for wireless communications is presented. In its basic form, a microstrip patch antenna consists of a dielectric substrate with radiating patch on one side and a ground plane on the other side. There are several advantages of this type of antennas such as planar, low cost, low profile, easy to fabricate, simple in structure with small in size, thus attractive for practical applications. The dimensions of proposed circular microstrip antennas which is fed by simple 50Ω inset-fed of length Lf=17.18 mm and Wf= 3.17 mm and radius R= 11.5 mm on the top surface of the FR4 substrate with thickness t=1.6 mm and bottom of the substrate a ground plane of size W=55.4 mm, L=44 mm is used. To obtain a quad-band operation, a pair of inverted T-shaped slits are inserted at the edges of the circular radiating patch with lengths of T11=15 mm and T12=4.4 mm.

The proposed antenna is resonating for four particular frequency points at 2.33 GHz, 4.18 GHz, 5.04 GHz and 6.49 GHz with impedance bandwidths of 2.7%, 2%, 2.1% and 2.6%. The antenna shows a broadside radiation characteristic at desired frequency bands and covers the WLAN (2.4-2.48/4.97-5.12 GHz), X-band lower satellite communication (6.42-6.59 GHz) applications.

1.
Girish
Kumar
and
K. P.
Ray
, “Broadband microstrip antennas”,
London
,
Artech House
,
2003
.
2.
J.
Bahl
and
P.
Bhartia
, “Microstrip Antennas”,
Boston
:
Artech House
,
1980
.
3.
Choi
,
S.H.
,
Park
,
J.K.
,
Kim
,
S.K.
, and
Kim
,
H.S.
, “
Design of dual-band antenna for the ISM band using a backed microstrip line
”,
Microw. Opt. Technol. Lett.
,
41
, (
6
), pp.
457
460
,
2004
.
4.
Ashwini C
Tengli
and
P M
Hadalagi
, “
Design of Inset-Fed Triple –Band Rectangular Microstrip Antenna For WiMAX. 5.5 WLAN And Lower X-Band Satellite Apllications
”,
IJEEER.
, vol,
7
, no,
4
, pp.
29
36
, Aug
2017
5.
C. A.
Balanis
, “Antenna Theory Analysis and Design”,
John Wiley & Sons
,
2005
.
6.
Y. B.
Kwon
,
J. I.
Moon
, and
S. O.
Park
, “
An internal triple-band planar inverted - F antenna
”,
IEEE Antennas Wireless Propag. Lett.
, vol.
2
, pp.
341
344
,
2003
.
7.
C. M.
Su
,
W. S.
Chen
, and
K. L.
Wong
, “
Compact dual-band metal-plate antenna for 2.4/5.2-GHz WLAN operation
”,
Microw. Opt. Technol. Lett.
, vol.
38
, pp.
113
115
,
2003
.
8.
C. M.
Wu
, and
Y.
Dai
, “
Design of triple-frequency microstrip-fed monopole antenna using defected ground structure
”,
IEEE Trans. Antennas Propag.
, vol.
59
, no.
7
, pp.
2457
2463
, Jul.
2011
.
9.
Sarkar
I
,
Sarkar
.
P. P
and
Chowdhury
.
S. K
, “
A novel compact, microstrip antenna with multi-frequency operation
”,
International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory
vol.
1
, pp.
147
151
,
2009
.
10.
R.
Li
,
B.
Pan
,
J.
Laskar
, and
M. M.
Tentzeris
, “
A novel low-profile broadband dual-frequency planar antenna for wireless handsets
”,
IEEE Trans. Antennas Propag
. vol.
56
, no.
4
, pp.
1155
1162
, Apr.
2008
.
11.
Ansoft High Frequency Structure Simulation (HFSS), Ver. 13,
Ansoft Corporation, Pittsburgh
PA
,
2010
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