Investigation of a Low-Profile Planar Monolayer Uwb Antenna With an Open Slot for Bandwidth Enhancement

Abstract

Abstract-A low-profile planar monolayer antenna for ultra-wideband (UWB) operation is presented. To achieve a UWB performance along with a compact size, a hybrid square-circular radiator and a rectangular open slotted ground plane with two symmetrical I-shaped tuning stubs are proposed. The antenna is fed by a coplanar waveguide line and has a small size of 44 × 32 × 1.6 mm 3 . The prototype of the proposed antenna was fabricated and tested in an anechoic chamber. The simulated and measured results show good agreement over the entire ultra-wide bandwidth. The measured results indicate that the proposed antenna can provide a wide impedance bandwidth of more than 154% from 1.7 to 13.3 GHz with −10-dB reflection coefficient. In addition, it is demonstrated that by introducing several antenna designs, the impedance bandwidth can be improved from 43% to 154%. Besides several mechanical advantages, such as compact in size, easy fabrication, and monolayer configuration without any back ground plane, the proposed antenna also shows a good performance in its radiation characteristics and time-domain behaviors. The measured results in both frequency and time domains prove that the proposed antenna can be used in a wide range of UWB applications.

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

“…A CPW fed antenna comprising of hybrid shaped patch and rectangular slotted ground with a pair of stubs placed symmetrically has been proposed in [29]. A strip-line fed rectangular patch with two circular-edged and a ground with rectangular slot has been presented in [30].…”

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

“…Two UWB CPW-fed printed antennas with dimensions of 50×50 mm 2 and 48×42 mm 2 and impedance bandwidths of 118.8% and 125% are reported in [25] and [26], respectively. Recently, a bandwidth-enhancement method of using a new radiator with a hybrid square-circular configuration and a rectangular open slotted ground plane with a pair of symmetrical I-shaped tuning stubs was introduced to implement a CPW-fed planar monolayer UWB antenna with a size of 44 × 32 × 1.6 mm 3 [27].…”