Design of a Super Wide Band Antenna and Measure of Ambient RF Density in Urban Area

Lingsheng Yang,Dan Zhang,Yajie Li,Xiaolei Zhu

doi:10.1109/access.2019.2962141

Abstract

A compact Super Wide band (SWB) antenna fed by coplanar waveguide (CPW) is proposed in this paper. The size of the antenna is 140 × 100mm 2 (0.16λ × 0.12λ). The antenna originates from 3D volcano smoke antenna, and consists of a prolonged radiation patch and a symmetrical ground. Both the patch and ground were designed as smoothing structure, which can improve the impedance matching through a wide band. The simulated and measured bandwidth show that the antenna has a well-matched impedance bandwidth from 400MHz to higher than 20GHz under VSWR = 2 criterion, and the bandwidth ratio is greater than 50:1. The gain, efficiency and radiation pattern were all measured, and the maximum gain and efficiency are 6.3dBi and 96%, respectively. The antenna was also used to measure the ambient radiation frequency (RF) density in an urban area of Nanjing in China, which on the other hand proves the efficiency of this design.

Highlights

With the rapid development of wireless communication technologies, many wireless communication systems have been developed, such as DTV (400-800MHz), GSM850 (824–894MHz), GSM900 (880–960MHz), GSM1800/1900, GPS (1.57-1.58GHz), WLAN (2.4GHz/5.8GHz), 4G LTE bands, newly licensed sub-5G bands (3.3-4.2GHz and 4.4-5.0GHz), and UWB (3.1-10.6GHz)
Since Rumsey et al [1] designed a series of broadband antennas with a ratio bandwidth greater than 10:1 from the late 1950s to early 1960s, and defined them as Super Wideband (SWB) antennas, SWB antennas have attracted a lot of attention from both the academy and industry due to their
A SWB fractal antenna based on circular-hexagonal geometry was proposed in [4], radial arrow shaped fractal slots forms the path of surface currents and lead to a super wide band from 2.18GHz to 20GHz

Summary

INTRODUCTION

With the rapid development of wireless communication technologies, many wireless communication systems have been developed, such as DTV (400-800MHz), GSM850 (824–894MHz), GSM900 (880–960MHz), GSM1800/1900, GPS (1.57-1.58GHz), WLAN (2.4GHz/5.8GHz), 4G LTE bands (from 452.5-3800MHz), newly licensed sub-5G bands (3.3-4.2GHz and 4.4-5.0GHz), and UWB (3.1-10.6GHz). An egg-shaped monopole was presented in [7], a fractal-complementary slot was embedded into the asymmetrical ground plane, and the proposed antenna was able to perform well from 1.44GHz to 18.8 GHz. In [8], the planar monopole consists of a tapered radiating patch and a rectangular truncated ground, and can operate over a bandwidth of 2.5GHz-80GHz with S11 < −10dB. The antenna’s origin is a conventional 3D volcano smoke antenna Both the simulated and measured results show that the antenna has a wide and well matched impedance bandwidth from 400MHz to higher than 20GHz, so the antenna can support a variety of communication systems (including all the aforementioned wireless systems).

ANTENNA DESIGN

RESULTS AND DISCUSSION

MEASURE OF AMBIENT RF POWER DENSITY

CONCLUSION