Semicircular Ground Plane Research Articles

A compact wrench-shaped patch antenna with a slotted parasitic element and semi-circular ground plane for 5G communication

This work introduces a low-profile, compact microstrip patch antenna for 5G applications using a slotted semi-circular ground plane and a slotted rectangular parasitic element. This patch antenna in the shape of a wrench offers a wide impedance bandwidth of 1.48 GHz and a reflection coefficient (|S11|) of -34.24 dB. The presented antenna is etched on a low-volume Rogers RT 5880 (lossy) dielectric substrate. It has small dimensions of 25 × 34.5 × 1.575 mm3, and it exhibits a maximum gain of 2.77 dB, maximum directivity of 3.70 dBi, and a VSWR of 1.03 at 3.14 GHz. The slotted parasitic element and a semi-circular ground plane improve bandwidth and impedance matching. The proposed antenna provides a maximum radiation efficiency of about 92 %. The performance parameters of the antenna have been verified independently by three different electromagnetic simulation tools, namely CST, HFSS, and FEKO. Finally, a prototype of the presented antenna has been fabricated, and its different radiation properties have been measured. The tested results also buttress the simulated results. There have been numerous parametric studies conducted. Because of its straightforward structure, smaller size, symmetrical radiation pattern, and steady gain, the proposed antenna may be a suitable candidate for 5G wireless devices.

A novel circular fractal ring UWB monopole antenna with dual band‐notched characteristics

AbstractThis paper presents a novel circular fractal ring monopole antenna for ultra‐wideband (UWB) hardware with dual band‐notched properties. The proposed antenna consists of four crescent‐shaped nested rings, a tapered feeding line at the front of the dielectric material, and a semicircular ground plane on the backside. In this design, the nested rings are used both as a radiation element and a band rejection element. The proposed antenna has a bandwidth of 9.03 GHz, which works efficiently in the range of 2.63 GHz–11.66 GHz with the dual notched bands of Worldwide Interoperability for Microwave Access (WiMAX) at 3.15 GHz–3.66 GHz and wireless local area network (WLAN) at 4.9 GHz–5.9 GHz, respectively. The antenna has a compact size of 20 mm × 30 mm × 1 mm (0.177 × 0.265 × 0.0084 λ0) and is implemented using a flame‐retardant type 4 (FR4) material. It has a maximum gain of approximately 4 dB in its operating range, and experimental results support the simulation predictions with high accuracy. The findings of this study imply that the designed antenna can be utilized in UWB applications.

Asymmetrically fed trapezoidal superwideband pattern diversity antenna

In this paper, a trapezoidal antenna element and its pattern diversity configuration for superwideband applications are presented. The antenna consists of a modified trapezoidal slot loaded modified trapezoidal radiator asymmetrically fed by a tapered feedline and notch loaded modified semi-circular ground plane. An operating bandwidth of 2.6 THz to more than 60 THz is achieved for both configurations. The dimensions of the antenna element and diversity configuration are 24 × 41.8 um2 and 41.8 × 65.8 um2 respectively. For single element, a peak realized gain of 17 dB is observed. For diversity configuration, an intra-element isolation of more than 20 dB in most of the operating band is achieved. The proposed antenna element and diversity configurations are compact and have wider bandwidth in comparison to previously reported structures.

Tetradecagonal ring shaped terahertz superwideband MIMO antenna

A microstrip line fed tetradecagonal ring shaped microstrip antenna for superwideband multiple input multiple output applications is designed and analyzed in this paper. It comprises tetradecagonal radiator with a modified semi-circular ground plane. It has an impedance bandwidth of 14.8 THz from 0.3 THz to 15.1 THz for S11≤-10dB. The spatial and pattern diversity configurations have operating bandwidth of 0.25–15.4 THz and 0.2–15.3 THz respectively. The spatial diversity and pattern diversity configurations have an isolation of S21≤-20dB in most of their operating band. The footprints of two configurations are 800 μm × 1170 μm and 800 μm × 1220 μm are respectively. The MIMO performance parameters also have acceptable values for both configurations. Both configurations have miniaturized dimensions and super wideband bandwidth.

Irregular Hexagonal shaped antenna for UWB Applications

This paper presents the design of a microstrip line fed irregular hexagonal shaped monopole antenna. The antenna consists of a sliced semi-circular ground plane with a square slit below the feed line which exhibits an Ultra Wide Band (UWB) of 7.5GHz. A frequency notch band (5.1GHz – 5.57GHz) is obtained by introducing ‘U’ shaped slot on to the proposed antenna. The proposed monopole is fabricated, measured for reflection coefficient, radiation pattern and peak gain to validate the performance of the antenna.

Hexagonal tree shaped ultra–wideband fractal antenna

ABSTRACTA compact hexagonal tree shaped fractal antenna for ultra–wideband (UWB) applications is presented. The bandwidth has been enhanced by using modified feedline and semi-circular ground plane. The impedance bandwidth of 2.5–16 GHz (146%) has been achieved. The proposed second iteration fractal antenna has nearly omnidirectional patterns at its resonance frequencies with an average gain of 4 dB. The simulation and experimental results are found to be in good agreement. The antenna exhibits better reflection coefficient performance along with reduced dimensions as compared to ones reported earlier.

Small monopole antenna with semicircular ground plane for UWB applications with variable band-notch structure

In this article a novel small microstrip monopole antenna with balloon-shape radiation patch and two circular ground structure in the back plane with variable band-notch structure is presented.Impedance bandwidth of the proposed antenna is approximately 153% with S11 <−10 dB in the frequency range of 3.2–23 GHz over an ultra-wideband frequency range with a variable center frequency band-notch from 5.1 GHz to 8.2 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:12–14, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27255