A Compact Uwb Antenna Design Using Rounded Inverted L-Shaped Slots and Beveled Asymmetrical Patch

Abstract

Abstract-A compact ultra-wideband (UWB) antenna with simple structure is presented. To achieve UWB performance with a compact size, two open ended rounded inverted L-shaped slots are etched on the square ground plane. Moreover, further bandwidth enhancement is obtained by cutting a bevel on the asymmetrical radiating patch. The antenna is fed by a 50 Ω microstrip line and has a small size of 28 × 28 × 1.6 mm 3 . The simulation time-and frequency-domain results obtained from HFSS simulator package are verified by experimental measurements. Both simulated and measured results show that the antenna can provide a wide impedance bandwidth of more than 129% from 2.7 to 12.55 GHz with −10-dB reflection coefficient. Besides, it is shown that by introducing several antenna designs, the impedance bandwidth can be enhanced from 58% to 129%. The effects of the key design parameters on the antenna impedance bandwidth are also investigated and discussed. Measured results for the reflection coefficient, far-field radiation patterns, radiation efficiency, gain, and group delay of the designed antenna over the UWB spectrum are presented and discussed. Measured data show good concordance with the numerical results. Also, the fidelity factor is calculated in both E-and H-plane by using CST Microwave Studio. The obtained results in both time-and frequency-domain indicate that the antenna is a good option for UWB applications.

X ve Ku Bandı İçin Dikdörtgen Ve Simetrik L-Şekilli Yarıklara Sahip Çoklu Bant Yama Antenlerde Malzeme Etkileri

“…Bu eksikliklerin giderilmesi için antenler üzerinde farklı çalışmalar yapılmış ve değişik geometriler literatüre sunulmuştur. Kare zemin düzleminde iki açık uçlu yuvarlak ters L şeklinde yarık kazınarak bir kompakt ultra geniş bant anten 50 Ω mikroşerit hat ile beslenmiş ve 28 × 28 × 1,6 mm 3 'lük bir boyutla, antenin 2,7 ila 12,55 GHz arasında %129'dan fazla bant genişliğine ulaşması sağlanmıştır [1]. İki açık uçlu çeyrek dalga boylu yarığa sahip kompakt bir eş düzlemli dalga kılavuzu (CPW) beslemeli ultra geniş bant (UWB) baskılı monopol bir anten, WiMAX için 3,3 -3,6 GHz ve WLAN için 5,15 -5,825 GHz'de çift bantlı çalışma özellikleri oluşturmuştur [2].…”

Improvement in the Gain of UWB Antenna for GPR Applications by Using Frequency-Selective Surface

“…us, contribution of UWB antennas towards these signi cant applications motivated the researchers towards further investigation of the UWB antennas. To obtain UWB performance, various design techniques such as slotted patch antennas with partial and slotted ground plane, stubs in the ground, and monopole antennas with rectangular, U-shaped, circular, elliptical, and even more complex structures have been frequently reported in the literature [9][10][11][12][13][14][15]. In [9,10], circular and elliptical-shaped antennas are proposed covering UWB spectrum.…”

“…Likewise, elliptical UWB antennas are presented in [12,13] with a slotted ground plane to enhance the radiation characteristics of the antenna. In the same way, the designs reported in [14,15] incorporated slots in the ground plane to improve the impedance bandwidth of the UWB antenna. In addition to UWB characteristics, small-sized antennas are essential for compact wireless devices.…”

Infinite length slotted ultra-wideband monopole antenna using step-feed with band notch characteristics

“…This antenna consists of a radiator patch with two slits out of which one is V-shaped and the other is split ring-shaped. An asymmetrical structure consisting of a rectangular patch and two inverted L-shaped slots on the square ground plane has been proposed in [25]. This design successfully achieves the whole UWB bandwidth.…”