A Reconfigurable Notched Band Monopole Antenna for C-Band Applications

Abstract

In this paper, a wideband monopole antenna with reconfigurable frequency notch through wireless local area network (WLAN) (5.15-5.35GHz and 5.725-5.825GHz) or future wireless fidelity 6GHz (Wi-Fi-6E) (5.925-7.125GHz) band for C-band applications is presented. The conventional/basic monopole antenna consists of four-leaf clover antenna structure with cascaded feeder and Defected Ground Structure (DGS). The basic antenna is designed and then simulated using Computer Simulation Technology (CST) and High-Frequency Structure Simulator (HFSS) readymade software programs. The antenna covering an operational bandwidth extends from 4.2GHz to 9.2GHz while the gain is around 4.0dBi. Two simple resonator conductors are added near the thin feeder of antenna to realize the notched frequency. The rejected frequency within WLAN or Wi-Fi 6E bands is controlled by the resonator conductor lengths, so Positive-Intrinsic-Negative (PIN) diodes switches are inserted to achieve the required length for each rejected band. Finally, each of the basic antenna and the proposed notched antenna are fabricated and measured. The measurement results are in good agreements with the simulated results of CST and HFSS, providing good antenna performance and sharp notches with good rejection values.

Reconfigurable Monopole Antenna Using Graphene Material for Wireless Applications

“…Many strategies that redistribute antenna currents and so alter the electromagnetic fields of the antenna's effective aperture are used to achieve this modification. Switches integrated into monopole antenna structure [2], varactor diodes [3], PIN diodes [4], or changing material characteristics such as using stretchable liquid metal monopole operating at 2.4 GHz [5], and material electric properties as plasma and graphene [6]. Different approaches are illustrated to achieve radiation pattern reconfigurability using graphene materials in 5G applications.…”

“…Figure 15. 3D Far failed pattern at 4.99GHz.Reconfigurable monopole is ordinarily used to reduce antenna size and can use in many different applications, Table (I) shows a comparison between the proposed antenna structure and reconfigurable antennas in literature references[15][16][17][18][19][20].…”