A Switchable Triple-Band Notched Uwb Antenna Using Compact Multi-via Electromagnetic Band Gap Structure

Abstract

In this paper, a miniaturized triple-band gap multi-via electromagnetic band gap (TBMV-EBG) structure is proposed. Lumped LC modelling method is used for the analysis of the proposed TBMV-EBG structure. Triple band gaps in both x and y-directions are obtained since TBMV-EBG unit cell consists of three resonance parallel LC circuits. Ansys (HFSS) simulation is used in eigen mode to simulate a unit cell of the proposed EBG. There is a strong agreement between simulated and experimental results. Comparing the proposed TBMV-EBG with triple band slotted EBG, triple band CSRR-EBG, fractal EBG, and dual band split EBG, size reductions of 6.52%, 7.53%, 23.21%, and 25.86% are obtained respectively which is validated by simulated and experimental results. Demonstration of the proposed TBMV-EBG structure for ultra-wideband (UWB) application is also presented. Simulation and measurement results prove that by using a single TBMV-EBG cell at the feed line of a UWB monopole antenna triple band-notches can be obtained. Moreover, switching characteristics of the proposed antenna are also demonstrated using single P-IN diode. Depending on the ON and OFF switching status of P-IN diode, the UWB antenna provides switching from triple band-notches to dual band-notches, respectively. The proposed switchable monopole UWB antenna as a single unit can be useful in applications wherein switching between multi-bands is desirable without changing the geometry of the structure.

Small UWB antenna with two stop bands by a compact EBG cell loaded with new open meander slots

“…To prove the improvement of the present design over the state of the art, a comparison with some of the latest designs of band stops UWB antennas by mushroom-type EBG cells is listed in Table 1. It can be seen that compared to [8][9][10][11][12][13][14][15], the size of the proposed antenna is almost halved. Compared to [10] and [13,14], fewer EBGs have been used to create two stop bands.…”

“…The fewer number of the employed EBG cells and the lower the amount of EBG area is, the less impact the EBG has on the antenna radiation pattern and the easier it is to match the impedance. Compared to [11] and [14, 15], the number of vias per EBG cells is fewer, which leads to less costly construction and less complexity. In addition, the selectivity of the stop bands is higher compared to [9], which is due to the squareness of the EBG patch, the location of the EBG cell, and the proposed slits structure.…”

“…In [14], with two via connections with coupling from the sides and connecting the vector diodes in an EBG cell with fractal structure, it is possible to continuously tune the stop bands by changing the bias voltage of the diodes independently of each other. In [15], by placing a compact multi-via EBG cell near the feedline and using a single p-i-n diode, a switchable UWB antenna with triple-band notched and dual-band notches capability is provided.…”

Design of Triple Band-Notched Uwb Mimo/Diversity Antenna Using Triple Bandgap Ebg Structure

“…It would be very difficult to accommodate in the limited ground plane area, the unit cells of three/four different sized EBG structures to design triple/quad band-notched UWB antenna [22]. Hence recently many authors have proposed UWB antennas integrated with dual/triple bandgap EBG structures [23][24][25][26][27][28] so that a single cell of EBG structure may suffice the requirement. However, all these structures have complicated designs and are difficult to fabricate.…”