Dual Band-Notched Microstrip-Fed Vivaldi Antenna Utilizing Compact EBG Structures

Abstract

We propose an ultra-wideband (UWB) antipodal Vivaldi antenna (AVA) with high-Qstopband characteristics based on compact electromagnetic bandgap (EBG) structures. First, an AVA is designed and optimized to operate over an UWB spectrum. Then, two pairs of EBG cells are introduced along the antenna feed line to suppress the frequency components at 3.6–3.9 and 5.6–5.8 GHz (i.e., WiMAX and ISM bands, resp.). Simulated and measured results show a voltage standing wave ratio (VSWR) below 2 for the entire 3.1–10.6 GHz band with high attenuation at the two selected subbands. This simple yet effective approach eliminates the need to deform the antenna radiators with slots/parasitic elements or comprise multilayer substrates. Furthermore, the flexibility it offers in terms of controlling both the number and locations of the band-reject frequencies is advantageous for antennas with nonuniform flares as in the AVA.

Electromagnetic band-gap structured printed antennas: A feature-oriented survey

“…Monopole with fractal, stepped and rectangular with a small perturbation geometry have also designed to reject 5.09 to 5.97 GHz, 4.9 to 6 GHz, 5.2‐5.8 GHz, respectively. Alshamaileh et al have also proposed an antipodal Vivaldi antenna (AVA) based on compact EBG structures for UWB applications. Yang et al have proposed slotted‐antenna with semicircular EBG to cover the dual notch characteristics of 4.55‐5.46 GHz and 5.68‐6.35 GHz band, simultaneously.…”

“…Based on this characteristic, several papers [120][121][122][123][124][125][126][127][128][129][130][131][132][133] have been published in the open literature for creating band-notch characteristics using EBG-structures. These are described in this section.…”

“…Yang et al 133 have proposed slotted-antenna with semicircular EBG to cover the dual notch characteristics of 4.55-5.46 GHz and 5.68-6.35 GHz band, simultaneously. Thus, the overall literature [120][121][122][123][124][125][126][127][128][129][130][131][132][133] is further summarized based on the method of coupling to the feed line and different notch features in Tables 7 and 8, respectively.…”

Mitigating the effects of time‐domain ringing in band‐notched UWB antennas

“…In particular, resonant strips or slots embedded in the antenna structure has drawn considerable attention as they require no extra footprint while creating band rejection at desired frequencies. Various designs that embed variants of split ring resonators (SRRs), complementary split ring resonators (CSRRs), and electromagnetic band‐gap structures (EBGs) have been reported with excellent band rejection characteristics at desired frequency bands …”

“…Various designs that embed variants of split ring resonators (SRRs), complementary split ring resonators (CSRRs), and electromagnetic band-gap structures (EBGs) have been reported with excellent band rejection characteristics at desired frequency bands. [1][2][3][4][5][6] While the aforementioned designs ensure band rejection to alleviate interference, notches in the frequency response may cause ringing in the time domain, which may degrade the fidelity of the transmitted (or received) UWB pulses. Such an effect may result in false detection and/or unwanted resonance characteristics for target characterization in impulse radars.…”