Compact stepped slot antenna for ultra-wideband applications

Abstract

In this paper, a compact stepped slot antenna for ultra-wideband (UWB) applications is proposed. A very small size and UWB bandwidth operation are achieved by integrating a stepped slot in the back side of the antenna. This stepped slot is excited by using a 50 Ω-feed line in the top side of the antenna. The antenna is characterized by an impedance bandwidth between 3.05 GHz and more than 12 GHz. The dimensions of the antenna are 17 mm × 8 mm × 1.27 mm, which leads to the most compact size compared with other works in the literature. The integrated stepped slot is divided into additional elementary slots, where each elementary slot has a matching point. Adding these elementary slots allows to increase further the operating bandwidth. The radiation pattern of the compact stepped slot antenna is omnidirectional in the H-plane and bidirectional in the E-plane. The measurement results agree well with the simulated ones in terms of impedance matching and radiation pattern.

Design of a compact patch antenna with bandwidth and efficiency improvement for UWB applications

“…It can be expressed as follows: η = Energy radiated/ Energy input In figure 7(a) and (b), the efficiency of the ordinary antenna with DGS and the proposed antenna are shown. The results of the simulation indicate that the planned antenna has an efficiency of 0.95779 (95.779%) which is dramatically higher than the efficiency of a normal antenna with DGS (0.92296) and superior to that demonstrated in Yadav and Baudha (2020), , Hammache et al (2022), , Baudha et al (2019) and Vijayalakshmi and Murugesan (2019). It clearly demonstrates that the recommended antenna efficiently radiates the large amount of power generated at an input.…”

“…A mace-shaped ground plane, split-ring resonators (SRR), and faulty ground structure were used to create circular microstrip patch antennas that would improve the bandwidth for ultra-wideband systems (Yadav and Baudha 2020;Gopi et al 2021;Subitha et al 2021). A partial ground plane (PGP) with grooves, R-slots, T-shaped slots, and L-shaped slots were employed to raise the bandwidth of tiny slit antennas for ultra-wideband usage Hammache et al 2022;Hammache et al 2020). Reconfigured patches, compressed ground surfaces, and imperfect ground layers were applied to enhance the bandwidth of planar antennas Baudha et al 2019;Singh et al 2020).…”

Broadband and Compact Design Variations of Z-shaped Printed Slot Microstrip Antenna

“…These antennas are in low profile, economical, and easy to interface with radio frequency (RF) circuitry. The researchers are prominently working on the development of various shape slot antennas [2][3][4][5][6][7][8][9][10][11]. A properly stepped size shape compact slot antenna for ultra wideband (UWB) application has been reported in [2].…”

“…The researchers are prominently working on the development of various shape slot antennas [2][3][4][5][6][7][8][9][10][11]. A properly stepped size shape compact slot antenna for ultra wideband (UWB) application has been reported in [2]. The combination of modified circular ring and U-shaped slots for dual band wireless applications has been presented to achieve 14.1% and 6.4% impedance bandwidths for GSM and Wi-MAX applications, respectively [3].…”

Rectangular microstrip antenna design with multi-slotted patch and partial grounding for performance enhancement

“…This antenna's maximum gain and fractional bandwidths are 3.2 dB and 118% (3.1 to 12.13 GHz), respectively, according to the simulation results. Hammache et al [21] presented a moderate stepped slot antenna for UWB operation. The simulation results demonstrated that the impedance bandwidth spans from 3.05 GHz to over 12 GHz.…”