A Novel Frequency Reconfigurable Monopole Antenna With Switchable Characteristics Between Band-Notched Uwb and Wlan Applications

Abstract

Abstract-This paper presents a novel frequency reconfigurable monopole antenna that has switchable notch characteristic at center frequency of 5.3 GHz. The proposed antenna consists of a defective ground structure (DGS) to enhance the impedance bandwidth from 3.17 to 13 GHz. The F-shaped parasitic element with three stubs (two vertical and one horizontal) are located on the back side of the radiating patch to achieve the band rejection characteristics from 4.9 GHz to 5.7 GHz. The metallic ground plane structure is connected or disconnected to the F-shaped parasitic element through stubs by means of p-i-n diodes. Experimental demonstration of applications of the proposed antenna structure as 5.3 GHz notched band ultra-wideband (UWB) antenna with all diodes in the OFF-state and as 5.3 GHz radiator for wireless local area network (WLAN) with all diodes in the ON-state is reported. In both the cases, good agreements between measured and simulated return losses, radiation patterns and realized gains are observed.

A state-of-art review on band-notch characteristics in UWB antennas

“…However, such antennas when encounter an interfering signal, they generate band notch function by changing their configuration which then eliminate interference with the coexistent system. The reconfiguration of the antenna structures can be achieved by employing different kind of RF switches such as PIN diodes, RF MEMS and metal semiconductor field effect transistor (MESFET) …”

“…Oraizi et al, have developed reconfigurable microstrip antenna with switchable notch band between WLAN and downlink X‐band. An F‐shaped parasitic element is used for notch characteristics at the back side of radiating element connected with three stubs by means of PIN diodes to provide reconfigurability . A reconfigurable triple band notched antenna has been proposed by Ali et al, with the advantage of switching between single or dual or triple notch states.…”

“…An Fshaped parasitic element is used for notch characteristics at the back side of radiating element connected with three stubs by means of PIN diodes to provide reconfigurability. 194 A reconfigurable triple band notched antenna has been proposed by Ali et al, 195 with the advantage of switching between single or dual or triple notch states. Two double split ring resonators are implemented for producing dual notches and then connected with PIN diodes for reconfigurability in.…”

“…Further, in Section 6 quad−/multiple‐notch based antenna configurations are investigated. The discussion also includes description of different reconfigurable configurations with notched bands in Section 7 . A summary of this review process is highlighted in Section VIII.…”

Resonator Based Switching Technique between Ultra Wide Band (UWB) and Single/Dual Continuously Tunable-Notch Behaviors in UWB Radar for Wireless Vital Signs Monitoring

“…Also, in [5] they removed all interfering frequency bands within the UWB spectrum and achieved Penta-notched behavior. Researchers also tried to achieve continuously tunable behavior [6], switchable behavior between narrow-band and wide-band [7], and reconfigurable notch band behavior [8,9]. All these techniques are limited up to two different behaviors from a single resonator.…”