Novel Wideband Microstrip Monopole Antenna Designs for WiFi/LTE/WiMax Devices

Hussein Hamed Mahmoud Ghouz,Mohamed Fathy Abo Sree,Muhammad Aly Ibrahim

doi:10.1109/access.2019.2963644

Abstract

In this paper, two compact and broadband microstrip monopole antennas have been proposed, designed, and presented using two novel sets of design equations. Each monopole antenna design has different dimension and characteristic. The proposed designs have been verified using a commercial electromagnetic simulator (CST-Studio) and implemented prototypes mounted on FR-4 substrate having a thickness of 1.6 mm. In addition, a linear array consists of only two monopole elements has been designed and presented to enhance the gain of the proposed monopole antenna. Simulation results confirmed the validity of the two novel sets of design equations for both monopole and array antennas. Also, the proposed array antenna (38 × 36 mm 2 size), achieved a moderate gain of (6.0 dBi), a satisfying efficiency of (81%), a VSWR that is less than 1.2 and a 22% fractional bandwidth of about 1200 MHz. Moreover, simulated and measured return losses of the proposed monopole antennas (single and array) accomplish a reasonable agreement. The proposed monopole antennas are simple designs and compact in size, and they can be used for many wireless applications including WiFi, LTE, and WiMax. In addition, a compact array of large monopole number can achieve a higher gain that is up to 18 dBi (four to eight monopole array elements with overall size 38 × 72 mm 2 to 38 × 144 mm 2 ). The novelty of this paper is by introducing the proposed and closed form design equations for a monopole introducing the length of monopole and ground of substrate dimensions as a function of ϵ r and thickness.

Highlights

Over the past few years, software and hardware development of communication systems has been rapidly growth to cover many wireless applications
Compact printed microstrip monopole antennas are one of the most important and current multiband antenna structures which can be used for many wireless applications including GPS, WLAN, RFID, LTE, WiMax and UWB
These dimensions have been calculated based on the two proposed sets of design equations (Eq (1) through Eq (3)), and they are optimized through a full parametric study

Summary

Introduction

Over the past few years, software and hardware development of communication systems has been rapidly growth to cover many wireless applications. M. Ghouz et al.: Novel Wideband Microstrip Monopole Antenna Designs compact substrate of average dimensions 45×74 mm2. A compact and broadband microstrip monopole linear array antenna has been proposed and experimental verified using a fabricated prototype_II, and it is referred to as MPA antenna.

Results

Conclusion