A WLAN band notched compact ultra-wideband (UWB) microstrip monopole antenna with stepped geometry is proposed. A L-slot loaded modified mushroom type Electromagnetic Band Gap (EBG) is designed, analyzed and used to realize notched band characteristics for wireless local area network (WLAN) in the UWB frequency range. The proposed antenna having partial ground plane is fabricated on a low cost ...

In this paper, a novel dual notch bands Ultra Wide-Band (UWB) antenna for WLAN and WiMAX applications is presented. The antenna contains a taper rectangular monopole antenna with new feed line which is designed and modified for 2–12 GHz. To achieve notch band at WLAN frequencies, different methods are compared such as L-shape slots for one notch or dual rings in notch designing. On the other ha...

We propose a MAC protocol for cognitive radioenabled secondary networks, which opportunistically use the channels of CSMA/CA-based primary network. We have considered IEEE 802.11 WLAN as a de facto primary network in ISM band. Our study focuses on a single WLAN channel that is used by a WLAN client and server for HTTP-based web browsing application. We use the theory of alternating renewal proc...

Complementary WLAN and WPAN technologies as well as other wireless technologies will play a fundamental role in the medical environments to support ubiquitous healthcare delivery. This paper investigates clear channel assessment (CCA) and its impact on the coexistence of WLAN (IEEE 802.11 high rate direct sequence spread spectrum (HR/DSSS) PHY) and WPAN (IEEE 802.15.4b) in the 2.4 GHz industria...

In this paper effects of two most likely interference sources: narrow-band (adjacent WLAN channels) and intra-system (Bluetooth-WLAN) interference on range and performance of IEEE 802.11b WLAN equipment were studied. Three main sets of measurements were performed: the first as “free space”, the second with narrowband interference and the third with wideband interference. The results of the firs...

A novel compact design of planar T-shaped monopole antenna with multi-band operation for WLAN/WiMAX system is proposed. By insetting a pair of mirrored L-shaped monopole strips, multi resonant modes close to 2.45/3.5/5.5 GHz band are excited to meet the specifications of WLAN/WiMAX system. And, the obtained impedance bandwidth across the operating bands can reach about 160/1100/2690MHz for the ...

A compact tri-band, low profile, and lightweight antenna is proposed for 2.4/5 GHz WLAN Ku-band applications. The geometry was a radiating rectangular patch surrounded by wide circular slot with an inverted-L strip connected to one side of the slot. It mounted on copper layer single FR4 substrate dielectric constant 4.3 height 1.6 mm. fed 50-Ω coplanar waveguide. This design very (40 × 40 mm3)....

In this paper, a new design of a frequency reconfigurable microstrip antenna by using microstrip line feeding for UWB applications is presented. The process of frequency band rejection is done through the slots on the radiation patch and ground plane of antenna. Also the antenna bandwidth has been improved by using partial Defected Ground Structure (DGS). Then by putting two switches on the gro...