Broad-band impedance matching of dispersive waveguides - the white light cavity approach

2020 ◽  
Author(s):  
Jacob Scheuer ◽  
Dimitry Filonov ◽  
Pavel Ginzburg
Keyword(s):  
White Light ◽  
Impedance Matching ◽  
Broad Band ◽  
White Light Cavity

Multi-band THz white light cavity in Landau-quantized graphene

2021 ◽  
pp. 114832
Author(s):  
Yandong Peng ◽  
Wenpeng Zhou ◽  
Lidan Lin ◽  
Bing Chen ◽  
Yangjian Cai ◽  
...  
Keyword(s):  
White Light ◽  
White Light Cavity ◽  
Multi Band

scholarly journals Publisher Correction: Universal impedance matching and the perfect transmission of white light

2018 ◽  
Vol 12 (7) ◽  
pp. 437-437
Author(s):  
Ku Im ◽  
Ji-Hun Kang ◽  
Q-Han Park
Keyword(s):  
White Light ◽  
Impedance Matching

scholarly journals Facile Synthesis of Cobalt-Doped Porous Composites with Amorphous Carbon/Zn Shell for High-Performance Microwave Absorption

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 330 ◽  
Author(s):  
Qilei Wu ◽  
Huihui Jin ◽  
Bin Zhang ◽  
Siqi Huo ◽  
Shuang Yang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Amorphous Carbon ◽  
Porous Carbon ◽  
High Performance ◽  
Impedance Matching ◽  
Broad Band ◽  
Matching Condition ◽  
Carbon Composite ◽  
Absorption Capacity ◽  
Zeolitic Imidazolate Framework

A facile method for the preparation of microwave absorbers with low density, high microwave absorptivity, and broad band is of paramount importance to the progress in practical application. Herein, commonly-used metal organic frameworks (MOFs) prepared just by mechanical stirring in methanol at room temperature were chosen as sacrificial templates to synthesize porous carbon composites with tunable dielectric and magnetic properties. With the replacement of Co atoms on the surface of zeolitic imidazolate framework-67 (ZIF-67) by Zn atoms, a Co-doped porous carbon composite with a low-dielectric amorphous carbon/Zn shell was constructed after annealing, leading to excellent impedance matching condition. Consequently, the as-obtained composite (Co/C@C-800) shows marvelous microwave absorption properties with an absorption capacity of −43.97 dB and a corresponding effective absorption bandwidth of 4.1 GHz, far exceeding that of the traditional porous carbon and composites directly derived from ZIF-67. The results provide a convenient way to modify MOFs for enhanced microwave absorption materials from the synergy of dielectric and magnetic losses.

ON-CHIP INDUCTORS OPTIMIZATION FOR ULTRA WIDE BAND LOW NOISE AMPLIFIERS

2011 ◽  
Vol 20 (07) ◽  
pp. 1231-1242 ◽  
Author(s):  
J. DEL PINO ◽  
SUNIL L. KHEMCHANDANI ◽  
ROBERTO DÍAZ-ORTEGA ◽  
R. PULIDO ◽  
H. GARCÍA-VÁZQUEZ
Keyword(s):  
Quality Factor ◽  
Noise Figure ◽  
Impedance Matching ◽  
Broad Band ◽  
Wide Band ◽  
Design Guidelines ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Integrated Inductor ◽  
On Chip

In this work, the influence of the inductor quality factor in wide band low noise amplifiers has been studied. Electromagnetic simulations have been used to model the integrated inductor broad band response. The influence of the quality factor on LNA performance of the inductors that compound the impedance matching networks, inductive degeneration and broadband load has been studied, obtaining design guidelines for optimizing the amplifier gain flatness. Using this guidelines, an LNA with wideband input matching, shunt-peaking load, and an output buffer was designed. Using Austria Mikro Systems BiCMOS 0.35 m process, a prototype has been fabricated achieving the following measured specifications: maximum gain of 12.5 dB at 3.4 GHz with a -3 dB bandwidth of 1.7–5.3 GHz, noise figure from 4.3 to 5.2 dB, and unity gain at 9.4 GHz.

scholarly journals Estimating dayside effective temperatures of hot Jupiters and associated uncertainties through Gaussian process regression

2019 ◽  
Vol 489 (1) ◽  
pp. 941-950 ◽  
Author(s):  
Emily K Pass ◽  
Nicolas B Cowan ◽  
Patricio E Cubillos ◽  
Jack G Sklar
Keyword(s):  
Gaussian Process ◽  
White Light ◽  
Present Model ◽  
Broad Band ◽  
Gaussian Process Regression ◽  
Hot Jupiters ◽  
Uncertainty Estimates ◽  
Model Independent ◽  
Unbiased Estimates ◽  
Effective Temperatures

ABSTRACT In this work, we outline a new method for estimating dayside effective temperatures of exoplanets and associated uncertainties using Gaussian process (GP) regression. By applying our method to simulated observations, we show that the GP method estimates uncertainty more robustly than other model-independent approaches. We find that unbiased estimates of effective temperatures can be made using as few as three broad-band measurements (white-light HST WFC3 and the two warm Spitzer IRAC channels), although we caution that estimates made using only IRAC can be significantly biased. We then apply our GP method to the 12 hot Jupiters in the literature whose secondary eclipse depths have been measured by WFC3 and IRAC channels 1 and 2: CoRoT-2 b; HAT-P-7 b; HD 189733 b; HD 209458 b; Kepler-13A b; TrES-3 b; WASP-4 b; WASP-12 b; WASP-18 b; WASP-33 b; WASP-43 b; and WASP-103 b. We present model-independent dayside effective temperatures for these planets, with uncertainty estimates that range from ±66 to ±136 K.

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