Design of a Dual-Band Bidirectional Antenna Using Superellipse-Monopole-Fed Rectangular Ring for IEEE 802.11 a/b/g/n Applications

Abstract

This paper presents the design of a dual-band bidirectional ring antenna fed by a superellipse surface probe for 2.4/5 GHz WLAN applications. The Method of Moments (MoM) with RWG basis function was utilized in the study and design processes. A prototype antenna was fabricated successfully with the advantages of simple and low-cost structure. The measured impedance bandwidth of 810 MHz (2.10–2.91 GHz) and 2.39 GHz (3.57–5.96 GHz) is achieved for the first and second band, respectively. The peak gains are also feasible, 4.67 dBi at 2.45 GHz and 7.83 dBi at 5.5 GHz, with bidirectional radiation patterns for both bands. From the experimental field tests, the proposed antenna was suitable for most applications in long and narrow communication sites in 2.4/5 GHz bands as desired. Also, the measured and calculated results were in good agreement.

Constructing a method for the geometrical modeling of the lame superellipses in the oblique coordinate systems

“…Study [20] suggests employing the Lamé superellipses to describe antennas aimed to receive electromagnetic vibrations. More or less the same topic is addressed in work [21], which reported the development of an omnidirectional ultra-wideband antenna in the superellipse shape.…”

A compact triple‐band dipole array antenna for selected sub 1 GHz, 5G and WiFi access point applications

“…On the other hand, a bi-directional radiation pattern is preferred over a conventional unidirectional one in many indoor applications such as planes, trains, metros, long buses, corridors in hotels, office buildings, and coal mines. Therefore, dipole antenna arrays with inherently low-profile characteristics and bidirectional radiation patterns are preferred to maximise user coverage [13][14][15], as shown in Figure 1. Such radiation patterns are also suggested for 5G repeaters to boost the signal quality in indoor environments [14].…”

Dual Band Notched UWB MIMO Antenna for Surfaces Penetrating Application

“…One of the serious defy of UWB systems is the frequency interference with other co-existing narrowband wireless communication systems such as the WiMAX operating in the 3.3-3.8 GHz band and the WLAN operating between 2.4-2.484 GHz for the lower band and between 5.15-5.825 GHz for the upper band. For that reason, UWB MIMO antenna with bands rejected performance is desired [7,8]. Recently, many UWB MIMO antennas with bands notched function have been discussed [9][10][11][12][13][14], but there are no realistic environmental tests for these antennas.…”