scholarly journals Directive Beam of the Monopole Antenna Using Broadband Gradient Refractive Index Metamaterial for Ultra-Wideband Application

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 9757-9763 ◽  
Author(s):  
Rahul Singha ◽  
Damera Vakula
Keyword(s):  
Refractive Index ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Gradient Refractive Index

scholarly journals Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application

2017 ◽  
Vol 6 (4) ◽  
pp. 63-69 ◽  
Author(s):  
R. Singha ◽  
D. Vakula
Keyword(s):  
Refractive Index ◽  
Beam Width ◽  
Parallel Line ◽  
Side Lobe ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Side Lobe Level ◽  
Beam Focusing ◽  
Gradient Refractive Index

A broadband gradient refractive index (GRIN) metamaterial is used to improve the gain of the tapered slot antenna. The proposed metamaterial is capable of reducing the side lobe level of the antenna. The gradient refractive index (GRIN) metamaterial is constructed by using non-resonant parallel-line unit cells with different refractive index. Due to the non-resonant structure, the proposed unit cell exhibits low loss and large frequency bandwidth. The metamaterial, whose effective refractive index is lower than that of the substrate on which the antenna is printed. Therefore, the proposed metamaterial is act as a regular lens in beam focusing. The GRIN metamaterial is integrated in front of the antenna which has the capability to manipulate electromagnetic wave accurately. The measurement results indicate that the reflection coefficient of the antenna is below -10 dB over the frequency band from 3 to 11 GHz. The radiation pattern of the antenna shows the beam width becomes narrow and directive with low side lobe level. The peak gain is increased by 2.1 dB at 9.5 GHz.

Enhanced Ultra-Wideband (UWB) Circular Monopole Antenna with Electromagnetic Band Gap (EBG) Surface and Director

2014 ◽  
Author(s):  
Amir I. Zaghloul ◽  
Youn M. Lee ◽  
Gregory A. Mitchell ◽  
Theodore K. Anthony
Keyword(s):  
Band Gap ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Electromagnetic Band Gap

scholarly journals Ultra-Wideband Trident Inset-Fed Monopole Antenna With a 3-D Conical Ground

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 2592-2601
Author(s):  
Philip Ayiku Dzagbletey ◽  
Jin-Young Jeong ◽  
Jae-Young Chung
Keyword(s):  
Monopole Antenna ◽  
Ultra Wideband

Gradient refractive-index optical rod prepared from methacrylate derivatives

1997 ◽  
Vol 22 (10) ◽  
pp. 668 ◽  
Author(s):  
Jui-Hsiang Liu ◽  
Hung-Tsai Liu
Keyword(s):  
Refractive Index ◽  
Gradient Refractive Index

Finite-ground-plane effects on the ultra-wideband planar monopole antenna

2004 ◽  
Vol 43 (6) ◽  
pp. 535-537 ◽  
Author(s):  
Saou-Wen Su ◽  
Kin-Lu Wong ◽  
Yuan-Tung Cheng ◽  
Wen-Shyang Chen
Keyword(s):  
Ground Plane ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Planar Monopole Antenna

An ultra-wideband CPW-fed monopole antenna with fan-shaped structure

2012 ◽  
Vol 54 (12) ◽  
pp. 2878-2880 ◽  
Author(s):  
Chen Wang ◽  
Ze-Hong Yan ◽  
Bo Li ◽  
Sheng Li
Keyword(s):  
Monopole Antenna ◽  
Ultra Wideband
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