International Journal of Scientific & Engineering Research, Volume 2, Issue 8, August-2011 1 ISSN 2229-5518 IJSER © 2011 http://www.ijser.org 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 ——————————  —————————— 1 INTRODUCTION 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. 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]. 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. 2 ANTENNA DESIGN AND SIMULATION RESULTS 2.1 Design Specification The design of the proposed antenna is shown in Fig. 2. A ————————————————  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 Fig. 1. Wireless Technologies.