Compact bio‐inspired dual‐band uniplanar electromagnetic bandgap‐backed antenna for wearable applications

2021 ◽  
Author(s):  
Jeremiah O. Abolade ◽  
Dominic B. O. Konditi ◽  
Vasant. M. Dharmadhikary
Keyword(s):  
Dual Band ◽  
Electromagnetic Bandgap

scholarly journals Realizing UWB Antenna Array with Dual and Wide Rejection Bands Using Metamaterial and Electromagnetic Bandgaps Techniques

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 269
Author(s):  
Ayman A. Althuwayb ◽  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Pancham Shukla ◽  
Ernesto Limiti
Keyword(s):  
Antenna Array ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Dual Band ◽  
Area Network ◽  
Electromagnetic Bandgap ◽  
Uwb Antenna ◽  
Average Gain ◽  
Left Handed ◽  
Notched Band

This research article describes a technique for realizing wideband dual notched functionality in an ultra-wideband (UWB) antenna array based on metamaterial and electromagnetic bandgap (EBG) techniques. For comparison purposes, a reference antenna array was initially designed comprising hexagonal patches that are interconnected to each other. The array was fabricated on standard FR-4 substrate with thickness of 0.8 mm. The reference antenna exhibited an average gain of 1.5 dBi across 5.25–10.1 GHz. To improve the array’s impedance bandwidth for application in UWB systems metamaterial (MTM) characteristics were applied it. This involved embedding hexagonal slots in patch and shorting the patch to the ground-plane with metallic via. This essentially transformed the antenna to a composite right/left-handed structure that behaved like series left-handed capacitance and shunt left-handed inductance. The proposed MTM antenna array now operated over a much wider frequency range (2–12 GHz) with average gain of 5 dBi. Notched band functionality was incorporated in the proposed array to eliminate unwanted interference signals from other wireless communications systems that coexist inside the UWB spectrum. This was achieved by introducing electromagnetic bandgap in the array by etching circular slots on the ground-plane that are aligned underneath each patch and interconnecting microstrip-line in the array. The proposed techniques had no effect on the dimensions of the antenna array (20 mm × 20 mm × 0.87 mm). The results presented confirm dual-band rejection at the wireless local area network (WLAN) band (5.15–5.825 GHz) and X-band satellite downlink communication band (7.10–7.76 GHz). Compared to other dual notched band designs previously published the footprint of the proposed technique is smaller and its rejection notches completely cover the bandwidth of interfering signals.

scholarly journals Electromagnetic Bandgap Structured CPW Fed Circular Monopole Antenna with Bandwidth Enhancement for Wideband Applications

2019 ◽  
Vol 8 (10) ◽  
pp. 879-882
Keyword(s):  
Satellite Communication ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Dual Band ◽  
Complete Analysis ◽  
Electromagnetic Bandgap ◽  
Bandwidth Enhancement ◽  
Proposed Model ◽  
Current Design ◽  
Band Gap Structure

A circular monopole antenna with coplanar wave guide feeding is constructed with the combination of Electromagnetic Band Gap structure for the improvement of bandwidth. A plus shaped defected ground is etched on the ground plane to obtain the EBG characteristics in the proposed antenna model. A complete analysis with respect to reflection coefficient, VSWR, impedance, radiation pattern, current distribution, gain and efficiency are presented in this work. The proposed model occupying the dimension of 50X50X1.6 mm on FR4 substrate with dielectric constant of 4.3. Antenna operating in the dual band of 1.5-3.6 GHz (GPS, LTE, Bluetooth and Wi-Fi applications) and 4.8-15 GHz (WLAN, X-Band and Satellite communication applications) with bandwidth of 2.1 and 10.2 GHz respectively. A peak realized gain of 4.8 dB and peak efficiency more than 80% are the key features of the current design.

scholarly journals A Novel Dual-band Electromagnetic Bandgap for WLAN Applications

2013 ◽  
Author(s):  
Huynh Nguyen Bao Phuong ◽  
Dao Ngoc Chien ◽  
Tran Minh Tuan
Keyword(s):  
Dielectric Permittivity ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Area Network ◽  
Electromagnetic Bandgap ◽  
High Impedance

A  novel  dual-band  electromagnetic  bandgap (EBG)  for  wireless  local  area  network  (WLAN) applications  is  designed  in  this  paper.  The  EBG structure is based  on  hexagonal geometry and does not use  via  or  multilayer.  The  bandgap  characteristics  are investigated  by  determining  the  scatter  parameters.  By adjusting  the  parameters  in  the  dimension  of  the structure, the dual bandgaps can be controlled easily to achieve  the  WLAN  frequencies.  Comparisons  between the proposed structure with another one, which have the same  dielectric  permittivity  and  thickness  of  the dielectric  substrate,  have  been  done.  The  structure  is then  also  optimized  to  obtain  the  high  impedance  in surface  at  the  frequencies  of  the  WLAN  bands,  which are  centered  at  2.45  GHz  and  5.5  GHz.  Simulated  and measured  results  are  shown  to  demonstrate  the performance of the proposed structure.

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