scholarly journals High-gain and Low-RCS Linear Polarization F-P Resonant Cavity Antenna Based on Metasurface

2021 ◽  
Vol 30 (4) ◽  
pp. 622-630
Author(s):  
J. Lu ◽  
X. Cao ◽  
J. Gao ◽  
H. H. Yang ◽  
L. Jidi ◽  
...  
Keyword(s):  
Linear Polarization ◽  
Resonant Cavity ◽  
High Gain

Design of high-gain low-profile resonant cavity antenna using metamaterial superstrate

2010 ◽  
Vol 52 (8) ◽  
pp. 1855-1858 ◽  
Author(s):  
Gang Zhao ◽  
Yong-Chang Jiao ◽  
Fan Zhang ◽  
Fu-Shun Zhang
Keyword(s):  
Resonant Cavity ◽  
High Gain ◽  
Low Profile

High-Gain Low-Profile Chip-Fed Resonant Cavity Antennas for Millimeter-Wave Bands

2019 ◽  
Vol 18 (11) ◽  
pp. 2394-2398 ◽  
Author(s):  
Julio Gonzalez Marin ◽  
Affan A. Baba ◽  
Daniel Lopez Cuenca ◽  
Jan Hesselbarth ◽  
Raheel M. Hashmi ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Resonant Cavity ◽  
High Gain ◽  
Low Profile

Analysis and Design of High Gain NRI Superstrate Based Antenna for RF Energy Harvesting System

2016 ◽  
Vol 2 (3) ◽  
pp. 647
Author(s):  
K.K.A. Devi ◽  
C. H. Ng
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Effective Permittivity ◽  
Resonant Cavity ◽  
High Gain ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
Impedance Match ◽  
Strip Line ◽  
Analysis And Design

<p>A high gain patch antenna inspired by 4 layers of negative refractive index (NRI) metamaterial superstrate is proposed to operate at downlink radio frequency (RF) band (935 MHz to 960 MHz of GSM 900). The metamaterial unit cell consists of a nested split ring resonator (SRR) and strip line laminated on other side of FR4 substrate. The effective permittivity and permeability of the proposed unit cell are designed synchronously to approach zero, which leads the NRI superstrate to have impedance match with zero and negative refractive index.The NRI superstrate is studied using Fabry-Perot (F-P) resonant cavity. The gain is improved by 82.48% at the air gap of 55 mm in the desired frequency band.Therefore, the gain of the antenna is effectively enhanced based on the negative refractive index metamaterial. The measured radiation pattern and S parameter results also showed that it has good agreement with the simulation results.</p>

High Gain, Low Threshold Current GaInAsP Based Vcsels for Operation at 1.24UM

2002 ◽  
Vol 744 ◽  
Author(s):  
Zhuopeng Tan ◽  
Yixin Li ◽  
Aris Christou
Keyword(s):  
Resonant Cavity ◽  
Threshold Current ◽  
High Gain ◽  
Cavity Surface ◽  
Optimized Design ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Low Threshold ◽  
External Efficiency ◽  
Threshold Gain

ABSTRACTAn electrically pumped 1.24um GaxIn1-xAsyP1-y Vertical Cavity Surface Emitting Laser (VCSEL) has been designed and simulated. Threshold gain of 153cm-1 and threshold current of 1.00mA was obtained. The external efficiency predicted is 0.31. Also the optimized design of VCSEL structure is presented in this article. GaInAsP and AlInAs constitute the Distributed Bragg Reflectors (DBRs) multilayer stack. Reflectivity of the top DBRs is 0.97 and reflectivity of the bottom DBRs is 0.9978 and is shown to provide a good resonant cavity and sufficient lasing intensity. Compared with other reported structures, the present VCSEL has a lower threshold current and higher threshold gain.

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