A Novel Reconfigurable Uwb Filtering-Antenna With Dual Sharp Band Notches Using Double Split Ring Resonators

Abstract

Abstract-This study presents a novel technique for designing an ultra-wideband (UWB) filteringantenna with dual sharp band notches. This design is composed of a modified monopole antenna integrated with resonant structures. The monopole antenna is modified using microstrip transition between the feedline and the patch. In addition, block with a triangle-shaped slot is loaded on each side of the ordinary circular patch to produce wide bandwidth with better return loss and higher frequency skirt selectivity. The resonant structures are constructed using two double split ring resonators (DSRR) loaded above the ground plane of the antenna to produce dual band notches and filter out WiMAX (3.3-3.7 GHz) and HiperLAN2 (5.4-5.7 GHz) frequencies. The band notch position is controlled by varying the length of the DSRR. The reconfigurability feature is achieved by using two PIN diode switches employed in the two DSRR. The measured results show that the proposed filtering-antenna provides wide impedance bandwidth from 2.58 to 15.5 GHz with controllable dual sharp band notches for WiMAX and HiperLAN, peak realized gain of 4.96 dB and omnidirectional radiation pattern.

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

“…Although the authors have tried at their level best in including the important and novel contribution of the researchers in this review article, still the authors apologize to the researcher community if any significant contribution is skipped unknowingly and unintentionally. [186][187][188][189]192,195,196,204,207 Reconfigurable 184-209 192,193,[195][196][197][198][199][200][201][202][203]207,193,195,203,204 Others 185,187,190,191,208,209…”

“…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) …”

“…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. Two double split ring resonators are implemented for producing dual notches and then connected with PIN diodes for reconfigurability in …”

“…Two double split ring resonators are implemented for producing dual notches and then connected with PIN diodes for reconfigurability in. 196…”

“…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.…”