Dual-Band Operation of Relativistic BWO With Linearly Polarized Gaussian Output

2014 ◽  
Vol 42 (8) ◽  
pp. 2141-2145 ◽  
Author(s):  
Ahmed M. Elfrgani ◽  
Sarita Prasad ◽  
Mikhail I. Fuks ◽  
Edl Schamiloglu
Keyword(s):  
Dual Band ◽  
Linearly Polarized ◽  
Relativistic Bwo

scholarly journals High-Efficiency Polarizer Reflectarray Antennas for Data Transmission Links from a CubeSat

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1802
Author(s):  
Eduardo Martinez-de-Rioja ◽  
Daniel Martinez-de-Rioja ◽  
Rafael López-Sáez ◽  
Ignacio Linares ◽  
Jose A. Encinar
Keyword(s):  
Circular Polarization ◽  
Data Transmission ◽  
High Efficiency ◽  
High Gain ◽  
Dual Band ◽  
Left Handed ◽  
Linearly Polarized ◽  
Flat Profile ◽  
First Time ◽  
Collimated Beam

This paper presents two designs of high-efficiency polarizer reflectarray antennas able to generate a collimated beam in dual-circular polarization using a linearly polarized feed, with application to high-gain antennas for data transmission links from a Cubesat. First, an 18 cm × 18 cm polarizer reflectarray operating in the 17.2–22.7 GHz band has been designed, fabricated, and tested. The measurements of the prototype show an aperture efficiency of 52.7% for right-handed circular polarization (RHCP) and 57.3% for left-handed circular polarization (LHCP), both values higher than those previously reported in related works. Then, a dual-band polarizer reflectarray is presented for the first time, which operates in dual-CP in the frequency bands of 20 GHz and 30 GHz. The proposed antenna technology enables a reduction of the complexity and cost of the feed chain to operate in dual-CP, as a linear-to-circular polarizer is no longer required. This property, combined with the lightweight, flat profile and low fabrication cost of printed reflectarrays, makes the proposed antennas good candidates for Cubesat applications.

Dual-band asymmetric transmission of linearly polarized wave using Π-shaped metamaterial

2014 ◽  
Vol 117 (2) ◽  
pp. 633-638 ◽  
Author(s):  
Xiaojun Huang ◽  
Dong Yang ◽  
Shengqing Yu ◽  
Liang Guo ◽  
Linyan Guo ◽  
...  
Keyword(s):  
Dual Band ◽  
Asymmetric Transmission ◽  
Linearly Polarized

A Compact Dual-Band Linearly Polarized Shared-Aperture Base Station Antenna

2021 ◽  
Author(s):  
Yuwen Feng ◽  
Yunxue Xu ◽  
Lu Zhang ◽  
Yuhao Zhang
Keyword(s):  
Base Station ◽  
Dual Band ◽  
Linearly Polarized

Dual-Band Circularly Polarized Transmitarray With Single Linearly Polarized Feed

2020 ◽  
Vol 68 (6) ◽  
pp. 5015-5020
Author(s):  
Yuan-Ming Cai ◽  
Ke Li ◽  
Wenting Li ◽  
Steven Gao ◽  
Yingzeng Yin ◽  
...  
Keyword(s):  
Dual Band ◽  
Circularly Polarized ◽  
Linearly Polarized

Single-Feed Dual-Band Dual-Linearly-Polarized Proximity-Coupled Patch Antenna

2011 ◽  
Vol 53 (1) ◽  
pp. 90-96 ◽  
Author(s):  
Mehdi Veysi ◽  
Manouchehr Kamyab ◽  
Amir Jafargholi
Keyword(s):  
Patch Antenna ◽  
Dual Band ◽  
Linearly Polarized

scholarly journals Dual-band dichroic asymmetric transmission of linearly polarized waves in terahertz chiral metamaterial

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3235-3242 ◽  
Author(s):  
Tingting Lv ◽  
Xieyu Chen ◽  
Guohua Dong ◽  
Meng Liu ◽  
Dongming Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Light Propagation ◽  
Polarization State ◽  
Dual Band ◽  
Terahertz Waves ◽  
Asymmetric Transmission ◽  
Polarized Waves ◽  
Wide Range ◽  
Linearly Polarized ◽  
Chiral Metamaterial

AbstractPolarization conversion dichroism is of particular interest in manipulating the polarization state of light, whereas high-performance asymmetric transmission (AT) of linearly polarized waves is still inaccessible in the terahertz range. Here, a bilayer chiral metamaterial consisting of orthogonally chained S-shaped patterns with broken symmetry along the light propagation direction is proposed and demonstrated experimentally to realize a dual-band dichroic AT effect for linearly polarized terahertz waves. The AT effects are robust across a wide range of incident angles. The observed strong AT can be theoretically explained by a multiple reflection and transmission interference model and the transfer matrix method. The proposed bilayer chiral metamaterial may have broad applications in polarization manipulation, chiral biosensing and direction-dependent information processing.

A compact polarization reconfigurable stacked microstrip antenna for WiMAX application

2020 ◽  
pp. 1-16
Author(s):  
Murari Shaw ◽  
Niranjan Mandal ◽  
Malay Gangopadhyay
Keyword(s):  
Microstrip Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Rectangular Slot ◽  
Substrate Layer ◽  
Linearly Polarized ◽  
Coaxial Probe

Abstract In this paper, a stacked microstrip patch antenna with polarization reconfigurable property has been proposed for worldwide interoperability for microwave access (WiMAX) application. The proposed antenna has two substrate layers: upper and lower layers with two radiating patches connected with the coaxial probe. Without the upper layer the lower square-shaped substrate layer having regular hexagonal radiating patch with probe fed acts as a linear polarized antenna with impedance bandwidth for (S11 ≤ −10 dB) is 370 MHz 10.56% (3.32–3.69 GHz) cover WiMAX (3.4–3.69 GHz) application band. The hexagonal radiating patch is perturbed with an optimum rectangular slot to enhance the impedance bandwidth of the antenna. The lower substrate layer having hexagonal patch with the same probe position is stacked with the upper square-shaped substrate layer with same sized square patch and the upper patch soldered with the coaxial probe. The overall stacked antenna generates a circularly polarized band when the opposite corner of the top square radiating patch of the upper layer is truncated with optimum size. In order to generate another circularly polarized band and to improve the input impedance matching of the stacked antenna, the top radiating patch is perturbed with two slots and a slit. The stacked circularly polarized antenna generates impedance bandwidth of 12.75% (3.23–3.67 GHz) for (S11 ≤ −10 dB) with two circularly polarized bands (3.34–3.37 GHz) and (3.66–3.70 GHz) as per (axial ratio ≤ 3 dB) for WiMAX application. Therefore, the proposed antenna can be used as linearly polarized or dual band circularly polarized according to requirement.

scholarly journals Dual-Band, Linearly Polarized, Electrically Small Huygens Dipole Antennas

2019 ◽  
Vol 67 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Ming-Chun Tang ◽  
Zhentian Wu ◽  
Ting Shi ◽  
Richard W. Ziolkowski
Keyword(s):  
Dual Band ◽  
Dipole Antennas ◽  
Linearly Polarized
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