Half-wave and quarter-wave plates metasurfaces with elliptic dielectric resonators for microwave applications

2016 ◽  
Author(s):  
A. Yahyaoui ◽  
H. Rmili ◽  
M. Sheikh ◽  
A. Dobaie ◽  
L. Laadhar ◽  
...  
Keyword(s):  
Dielectric Resonators ◽  
Half Wave ◽  
Quarter Wave ◽  
Microwave Applications

scholarly journals Transmission Control of Electromagnetic Waves by Using Quarter-Wave Plate and Half-Wave Plate All-Dielectric Metasurfaces Based on Elliptic Dielectric Resonators

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ali Yahyaoui ◽  
Hatem Rmili ◽  
Karim Achouri ◽  
Muntasir Sheikh ◽  
Abdullah Dobaie ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Electromagnetic Waves ◽  
Quarter Wave Plate ◽  
Dielectric Resonators ◽  
Transmission Control ◽  
Half Wave Plate ◽  
Wave Plate ◽  
Polarized Waves ◽  
Half Wave ◽  
Quarter Wave

We present the design of all-dielectric Quarter-Wave Plate (QWP) and Half-Wave Plate (HWP) metasurfaces based on elliptic dielectric resonators (EDRs) for the transmission control of electromagnetic waves over the frequency band 20–30 GHz. First, an extensive numerical analysis was realized by studying the effect of the resonators geometry (thickness and ellipticity) on the transmission of both x- and y-polarized waves. Then, based on the numerical analysis, we have realized and characterized experimentally both QWP and HWP all-dielectric metasurfaces.

scholarly journals Switchable Quarter-Wave Plate and Half-Wave Plate Based on Phase-Change Metasurface

2020 ◽  
Vol 12 (2) ◽  
pp. 1-10 ◽  
Author(s):  
Yaru Li ◽  
Jun Luo ◽  
Xiong Li ◽  
Mingbo Pu ◽  
Xiaoliang Ma ◽  
...  
Keyword(s):  
Phase Change ◽  
Quarter Wave Plate ◽  
Half Wave Plate ◽  
Wave Plate ◽  
Half Wave ◽  
Quarter Wave

Compact filtering power dividers with wide upper stopband

2019 ◽  
Vol 11 (08) ◽  
pp. 765-773
Author(s):  
Gaoya Dong ◽  
Weimin Wang ◽  
Yuanan Liu
Keyword(s):  
Transmission Lines ◽  
Wave Transmission ◽  
Coupling Matrix ◽  
Power Dividers ◽  
Full Wave ◽  
Half Wave ◽  
Coupled Lines ◽  
Quarter Wave ◽  
Simulation Results ◽  
Good Agreement

AbstractA series of compact filtering power dividers (FPDs) with simple layouts are proposed based on coupling topology. The structure of the presented FPD1 is composed of three resonators and one isolating resistor. These FPDs can be designed based on coupling matrix filter theory. A half-wave transmission line is employed in FPD2 to introduce a transmission zero (TZ) locating at 1.27f0. The FPD3 is designed by replacing quarter-wave transmission lines in FPD2 with quarter-wave coupled lines, which will produce a TZ locating at 1.96 f0 and extend upper stopband bandwidth. For verification, three FPDs centered at 2.45 GHz are fabricated and measured. All measured results are in good agreement with the full-wave simulation results.

scholarly journals Continuously Wavelength-Tunable First-Order Narrowband Fiber Comb Filter Using Composite Combination of Wave Retarders

2020 ◽  
Vol 10 (18) ◽  
pp. 6150
Author(s):  
Jaehoon Jung ◽  
Yong Wook Lee
Keyword(s):  
Principal Axis ◽  
Beam Splitter ◽  
Orientation Angle ◽  
Comb Filter ◽  
First Order ◽  
High Birefringence ◽  
Filter Structure ◽  
Half Wave ◽  
Quarter Wave ◽  
Polarizing Beam Splitter

Here, by harnessing a composite combination of wave retarders, we propose and experimentally demonstrate a first-order narrowband fiber comb filter capable of continuously tuning its wavelength, of which the filter structure is on the fundamental basis of a polarization–diversity loop structure. The demonstrated comb filter consists of a polarizing beam splitter (PBS), two high birefringence fiber (HBF) segments of the same length, an ordered wave retarder combination (WRC) of a quarter-wave retarder (QWR) and a half-wave retarder (HWR) before the first HBF segment, and an ordered WRC of an HWR and a QWR before the second HBF segment. The second HBF segment is butt-coupled to one port of the PBS so that its principal axis should be 22.5° away from the horizontal axis of the PBS. Taking the filter transmittance obtained by Jones calculus into consideration, we found the azimuth orientation angle (AOA) sets of the four wave retarders, which could allow extra phase shifts (ψ’s) ranging from 0° to 360° to be induced in the narrowband transmittance function. From filter transmission spectra calculated according to the AOA sets found above, it is confirmed that the first-order narrowband comb spectrum can be continuously tuned by properly controlling the AOA’s, clearly indicating the continuous wavelength tunability based on a composite combination of ordered wave retarders. This theoretical prediction was verified by actually constructing the proposed filter. Then, it is concluded that our filter employing the composite combination of wave retarders can be continuously frequency-tuned by properly controlling the AOA’s of the wave retarders.

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