5.8 GHz industrial, scientific and medical (ISM band)
bands is proposed [4].
International Journal of Scientific & Engineering Research, Volume 2, Issue 8, August-2011 1
ISSN 2229-5518
A Two-Sleeve Dual Band Antenna for Wireless
Applications
Shikha Sukhija, Sukhdeep Kaur
Abstract—This paper describes the two sleeves dual band antenna design for the wireless Application. This proposed antenna operates simultaneously at 3.5 and 5.2/5.8 GHz (WiMax and WLAN services) spectrum. Effects of varying the different parameters on the antenna performance have been studied. This compact antenna fed by 50ohm microstrip line is low profile and very easy to manufacture.
Key Words— Dual-band, ISM, Microstrip, Notch, Sleeves, WiMAX, WLAN
—————————— ——————————
NTENNA design has become one of the most ac- tive fields in the communication studies. Wireless technology has expanded rapidly not only for commercial but also for military purposes. Wireless technology provides less expensive alternative and a flexible way for communication. Antenna is one of the important elements in the RF system for receiving or transmitting the radio wave signals from and into the air as the medium. One of the types of antenna is the microstrip antenna [1]. The microstrip antenna has been said to be the most innovative area in the antenna engineering, thanks to its low material cost and its ea- siness of fabrication which the process can be made inside universities or research institutes .Wireless communications continue to enjoy exponential growth in the cellular telephony, wireless Internet, and wire- less home networking arenas. The wireless networks include wireless local area networks (WLAN). The IEEE 802.11 group has been responsible for setting the standards in WLAN. One major technology exists in the industrial ISM bands: 2.4-2GHz.4835 GHz, 5.15
GHz -5.35 GHz, and 5.725 GHz -5.825GHz. On the oth- er hand, WiMAX technology has emerged as a feasible solution, because of its inherent features that holds great promise for the future of wireless communica- tions. Worldwide Interoperability for Microwave Access is the next stage to a broadband as well as a wireless world, extending broadband wireless access to new locations and over longer distances, as well as considerably reducing the cost of bringing broadband to new areas. WiMAX (802.16) technology offers great- er range and bandwidth than the other available or forthcoming broadband wireless technologies such as Wireless Fidelity (Wi-Fi) and Ultra-wideband (UWB) family of standards.
————————————————
Shikha Sukhija is currently pursuing masters degree program in electron- ics & communication engineering in JCD college of Engineering from KUK, India,E-mail: shikhasukhija@yahoo.co.in,shikha.sukhija@yahoo.co.in
Sukhdeep Kaur is Associate Professor in J.C.D. college of engg., Sirsa, Haryana,India,Email id: ersukhdeepkaur@gmail.com
Therefore the antenna is required to operate at two or more frequency bands for WiMAX and WLAN sys- tems[2], [3], [5], [6].Some of the desired features for these antennas include broad bandwidth, simple im- pedance matching to the feed line and low profile. In this paper, design of the dual band microstrip antenna for wireless commutation applications in 3.5 GHz and
5.8 GHz industrial, scientific and medical (ISM band)
bands is proposed [4].
Fig. 1. Wireless Technologies.
In this paper, we demonstrate a novel and simple dual-band design of the printed monopole antenna. Simply by designing the two tuned branches side by side, dual-band operations for a printed monopole an- tenna can be easily obtained. The two side branches are called as Two-sleeves in this paper. In this case, the proposed monopole antenna looks like as to have two sleeves which has same or different dimensions and is referred to as the Two-sleeve monopole antenna in this study. Details of the antenna and effect of changing ground shapes, notches, and dimensions of the sleeves are described.
The design of the proposed antenna is shown in Fig. 2.
IJSER © 2011
International Journal of Scientific & Engineering Research, Volume 2, Issue 8, August-2011 2
ISSN 2229-5518
The Antenna is printed on an FR4 substrate having dimensions 40*40 sq. mm. with thickness 1.2 mm and relative permittivity 4.4 and dielectric loss tangent
0.02. A 50Ω microstrip line used to excite the antenna. The ground plane is set to L4*W (15*40) sq. mm. The width of the microstrip line is W3=4mm.The two sleeves has length of L1=35mm,L2=10mm having width w2 about 3mm. and W1=10mm & L3=5mm.
Fig. 4. E-Field distribution of the proposed antenna at 3.5 GHz.
Fig. 2. Design Configuration of the proposed Antenna.
The Antenna Characteristics with different length of sleeves is studied as shown in the Fig 3 in accordance with the following Table 1
TABLE 1
CHARACTERISTICS OF THE PROPOSED ANTENNA
Fig. 5. E-Field distribution of the proposed antenna at 5.5 GHz.
The Simulation is carried out by Ansoft HFSS 11.0 soft- ware. Fig.4 and Fig.5 shows the results for Electric field dis- tribution at 3.5 and 5.5 GHz freq. respectively. Here we can see that with the help of tuning sleeves, we have the band- width from 3.30GHz to 3.60 GHz (about 300 MHz) at 3.5
GHz frequency band and from 5.15GHz to 5.95 GHz (about
800MHz) at 5.5 GHz frequency band.
Ansoft Corporation
0.00
XY Plot 1
HFSSDesign1
-5.00
-10.00
-15.00
-20.00
-25.00
-30.00
-35.00
-40.00
-45.00
Curve Info antenna1
Imported
antenna2
Imported
antenna3
Imported
antenna4
Imported
1.00 2.00 3.00 4.00 5.00 6.00 7.00
Freq [GHz]
Fig. 3. Variation of return loss with frequency for the proposed an-
tenna. Fig. 6. Various ground shapes
IJSER © 2011
International Journal of Scientific & Engineering Research, Volume 2, Issue 8, August-2011 3
ISSN 2229-5518
Ansoft Corporation
0.00
-5.00
-10.00
-15.00
-20.00
-25.00
-30.00
-35.00
-40.00
XY Plot 1
HFSSDesign1
Curve Inf o ground2
Imported
ground3
Imported
ground4
Imported
ground1. Imported
5.825GHz).Fig.10. and Fig. 11. shows the polar plot representa- tion for this proposed Two-sleeve antenna. It was observed that two tuning different parameters playing a very important role in functionality of the antenna. This proposed antenna has the efficiency of about 80%.
1.00 2.00 3.00 4.00 5.00 6.00 7.00
Freq [GHz]
Fig. 7. Variation of return loss with different ground shapes for the proposed Antenna.
Fig. 10. 3D polar plot at 3.5 GHz
Fig. 8. Different notches cut from the substrate.
Fig. 11. 3D polar plot at 5.5 GHz
Ansoft Corporation
0.00
-5.00
-10.00
-15.00
-20.00
-25.00
-30.00
-35.00
XY Plot 1
HFSSDesign1
Curve Inf o notch1
Imported
notch2
Imported
notch3
Imported
notch4
Imported
I specially thanks to ER. SUKHDEEP KAUR for giving this opportunity to work under her supervision and for sharing her great knowledge and experience with me.Researches in [1], [2], [3], [4] contributed great information for this paper.
Dual-band operations of a Two-Sleeve monopole an- tenna have been demonstrated. Designed Antenna is
1.00 2.00 3.00 4.00 5.00 6.00 7.00
Freq [GHz]
Fig. 9. Variation of return loss with different notches cut for the proposed Antenna.
Fig. 6 . shows different shapes of the ground & corresponding results for these ground shapes are shown in the fig.7. [7].On the other hand , this paper also shows the variation in return loss graph for different notches. Fig.8. shows different notches cut from the substrate & Fig.9. shows the variation of the return loss for the respected notch.
Therefore, the antenna in this paper can cover five bands:
3.3GHz, 3.5GHz, & 5GHz band which is again segmented into three 100MHz sub bands a lower band (5.15-5.25 GHz) a mid- dle band (5.25-5.35GHz) and an upper band (5.725-
suitable for WiMAX and WLAN operations in the 3.5 and 5.5 GHz bands have been studied, and good an- tenna performances of the operating frequencies across both of the 3.5 and 5.5 GHz bands have been obtained. Effects of varying different parameters have also been studied.
[1] Chien-Yuan Pan., “Dual Wideband Printed Monopole Antenna for WLAN/WiMAX Application”, IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS,pp.149-151, VOL. 6, 2007
[2] Y.-L. Kuo and K.-L. Wong, ―Printed double-T monopole antenna for
2.4/5.2 GHz dual-band WLAN operations,‖ IEEE Trans. Antennas
Propag., vol. 51, no. 9, pp. 2187–2192, Sep. 2003.
IJSER © 2011
International Journal of Scientific & Engineering Research, Volume 2, Issue 8, August-2011 4
ISSN 2229-5518
[3] Nguyen Van TrinhW”, Designing Dual-band Antenna for WiMAX”, The 2009 International Conference on Advanced Technologies for Communications
[4] S. H. Choi, J. K. Park, S. K. Kim, and H. Y. S. Kim, ―Design of dual- band antenna for the ISM band using a backed microstrip line,‖ Mi- crow.Opt. Technol. Lett., vol. 41, no. 6, pp. 457–460, Jun. 2004.
[5] C.-Y. Huang and P.-Y. Chiu, ―Dual-band monopole antenna with-
shorted parasitic element,‖ Electron. Lett., vol. 41, no. 21, pp.1154–
1155, Oct. 2005.
[6] M. N. Suma, R. K. Raj, M. Joseph, P. C. Bybi, and P. Mohanan, ―A
compact dual band planar branched monopole antenna for DCS/2.4
GHz WLAN applications,‖ IEEE Microw.Wireless Compon. Lett., vol.16, no. 5, pp. 275–277, May 2006.
[7] C.-Y. Pan, C.-H Huang, and T.-S. Horng, ―A novel printed monopole
antenna with a square conductor-backed parasitic plane for dual-band
WLAN applications,‖ in Proc. IEEE Antennas Propag. Soc. Int. Symp.Dig., 2004, vol. 1, pp. 261–264.
IJSER © 2011