Design of a Novel Antenna and Its Characterization in Frequency and Time Domains for Ultra Wide Band Applications.

Abstract

Abstract-A novel compact planar monopole antenna for UWB applications is proposed in this paper. The proposed novelty of the antenna is attributed to the addition of suitable beveled stubs to a basic circular geometry of the radiator as an improved impedance matching technique to achieve enhanced radiation performances. The feed circuit is a tapered microstrip line with a matching section over a semi-elliptical ground plane. The proposed antenna achieves sufficient impedance bandwidth for a VSWR < 2 for frequencies from 3-15 GHz covering the entire UWB range (3.1-10.6 GHz), which is verified experimentally. Also this design achieves good gain, constant group delay and a near omnidirectional radiation pattern over the UWB band. The UWB characteristics of the antenna are evaluated in frequency and time domains. Results reveal that the proposed antenna has flat transfer function, linear phase and good impulse response with virtually no ringing which are the essential requirements for an UWB antenna for efficient pulse transmission/reception. The simulated and measured results of these parameters are presented. The performance results of the novel antenna with other designs is also compared and presented.

A compact asymmetric slot dual band antenna fed by CPW for PCS and UWB applications

“…The H ‐plane radiation patterns are found to be omnidirectional in shape while the E ‐plane radiation patterns have bidirectional or dumb bell shape behavior. It can be observed that the proposed antenna has radiation patterns almost similar to those in . A little difference between simulated and measured results in both the planes is possibly due to measurement and alignment errors.…”

“…Various configurations of UWB and dual‐band antennas for different applications have been reported in the literature . The antenna proposed in is a CPW‐fed circular patch monopole having an overall dimension of 41.6 × 28.38 mm 2 .…”

“…Dual operating bands from 2.4–2.484 and 5.150–5.950 GHz are obtained but again, with dimension of 75 × 75 mm 2 , the antenna is not quite portable for wireless communication devices. Some other antennas presented in references are compared in terms of the overall antenna size and achieved bandwidth in Table .…”

A Compact Modified Square Printed Planar Antenna for UWB Microwave Imaging Applications

“…For ultra-wideband antennas, evaluating the time domain behavior and studying the dispersion is very important [11]. For that, a reference signal which meets the FCC mask covering the range from 3.1 up to 10.6 GHz, should be applied at the antenna input [9]. The optimal pulse is the one suggested in [23] which has a good corresponding to the FCC mask and it can be obtained by the Gaussian 5th derivative (Fig.…”

“…However, they present some drawbacks in term of bandwidth, size and pulse distortion. For that reason, the necessity of achieving the main requirements of Simplicity, low weight, low cost of fabrication and a wide fractional bandwidth is crucial [9].…”