Novel Design of Proximity-fed Ultra-wide Band Annular Slot Antenna
A novel design of a proximity-fed annular slot antenna for UWB operation is presented.Different techniques are used to introduce a band rejection to the operated frequency band of the proposed prototype antenna.The antenna consists of a circular radiating patch placed non-concentrically inside a circular ground plane aperture.The patch is proximity-fed by a microstrip line on the other side of the substrate.This configuration provides an UWB performance in the frequency range of 2.85 to 7.95 GHz with relatively stable radiation parameters.Three different techniques to construct a resonant circuit are investigated to achieve the band-notch property in the 5.0-6.0 GHz band corresponding to the existing WLAN and HIPERLAN/2 networks.In the first technique,a single complementary split ring resonator(CSRR)and in the second technique,a complementary spiral loop resonator(CSLR)is etched off the circular patch.Whereas,in the third technique,a U-shaped slot is etched off the microstrip line.These resonators provide the band-notch property without degrading the UWB performance of the prototype antenna.Furthermore,the band-notched resonance frequency and the bandwidth can be easily controlled by adjusting the dimensions of the slots.The proposed antenna is simulated,using Zeland IE3D.The prototype antenna is fabricated and the measured data of the return loss versus frequency show very good agreement with the simulated results.The performance of the antenna is analyzed using parametric study to investigate the tuning effects of the resonator parameters on the impedance matching.The proposed antenna has a simple shape and provides almost omnidirectional field patterns,relatively flat gain and high radiation efficiency over the entire operated UWB frequency band excluding the rejected band.Satisfactory antenna performance with a simple structure and small size makes the proposed proximity-feed antenna a good candidate for UWB.
Ayman A.R.Saad Elsayed E.M.Khaled Deena A.Salem
Kosseir Radio,Telecom Egypt,Kosseir,Egypt Electrical Engineering Department,Assiut University,Assiut,Egypt Microstrip Department,Electronics Research Institute,Giza,Egypt
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
1429-1433
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）