Design and Testing of Superconducting Microwave Passive Components for Quantum Information Processing
Abstract
We report on the design, fabrication and testing of
two superconducting passive microwave components, a quadrature
hybrid and a 20 dB directional coupler. These components
are designed to be integrated with superconducting qubits or
Josephson parametric amplifiers and used in quantum information
processing applications. For the coupler, we measure return
loss and isolation 20 dB, and insertion loss 0.3 dB in a 2 ....etc

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F. Kung


Introduction to Filter
A filter is a network that provides perfect transmission for signal with frequencies in certain passband region and infinite attenuation in the stopband regions. Such ideal characteristics cannot be attained, and the goal of filter design is to approximate the ideal requirements to within an acceptable tolerance. Filters are used in all frequency ranges and are categorized into three main groups:
• Low-pass filter (LPF) that transmit all ....etc

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Procedure:-
1) Get the sampling frequency
2) Get the pass band frequency
3) Get the stop band frequency or transition width
4) Get the pass band ripple and stop band attenuation
5) Select the window suitable for the stop band attenuation
6) Calculate the order ,N, based on the Transition width
7) Find the N window coefficients
8) Find truncated impulse response of h
9) Verify the frequency response of h

MATLAB program for FIR filter
clear
clc
close all
% ENTER THE SAMPLING FREQUENCY
Fs = 8000;
%NORM ....etc

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Abstract—
The aliasing signal interferes with the actual signal and resembles more-like the original intermediate signal. This is called image frequency. To eliminate this image frequency a filter is to be designed in the RF (Radio Front) stage. At S-band microwave frequency (2 GHz to 4 GHz), the lumped components cannot be used due to distributed effects. Also, for the compactness of the filter, the distributed components are being used in microwave frequencies. Hence the coupled stage of microstrip filter with g ....etc

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Abstract

An integrated photonic microwave bandpass filter has been demonstrated incorporating a coherently coupled microring resonator in low-loss polymers. The resonator was designed to have an extremely small bandwidth so that it could be used to selectively pass the optical signal carrying the microwave signal to attain efficient bandpass filtering. The demonstrated device may feature compact size, simple structure, stable operation, possible tuning via the thermooptic effect, and furthermore flexible integration with other electrical/opt ....etc

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Procedure:-
1) Get the pass band and stop band edge frequencies
2) Get the pass band and stop band ripples
3) Get the sampling frequency
4) Get the order of the filter
5) Find the filter coefficients
6) Plot the magnitude response

MATLAB program for IIR filter
clear
clc
close all

% ENTER THE PASSBAND FREQUENCY in hz
wp = 500;
% ENTER THE STOPBAND FREQUENCY in hz
ws = 2000;
% ENTER THE PASSBAND RIPPLE & STOPBAND ATTENUATION
Rp = 3;
Rs = 20;
% ENTER THE SAMPLING FREQUENCY
Fs = 8000;
%NORMALIZED SAMPLIN ....etc

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Abstract
In this paper, a novel method of hybrid filter for denoising digital images corrupted
by mixed noise has been presented. The proposed design of hybrid filter utilizes the
concept of neuro fuzzy network and spatial domain filtering. This method incorporates
improved adaptive wiener filter and adaptive median filter to reduce white Gaussian noise
and impulse noise respectively. Selection of filters depends upon the performance of the
impulse noise detection process. The edge detector is capable of extracting edges from
fil ....etc

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K Rashmi Sekhar
K.Sravanthi
S.Sneha Deepthi


Abstract
Differential Evolution Algorithm is discussed. The design of a linear phase FIR Filter using DIFFERENTIAL EVOLUTION Algorithm is proposed. The frequency response of the designed LOW PASS FIR filter using Differential Evolution for different population and iterations are realized and compared. The best obtained filter can be used as a pulse-shaping filt ....etc

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Design and Implementation of Hybrid Active Power Filter



ABSTRACT
This paper deals with a hybrid active power filter
with injection circuit (IHAPF). This paper concluded
that the stability of the IHAPF based on detection
supply current is superior to that of others. To
minimize the capacity of IHAPF, an adaptive fuzzy
dividing frequency-control method,.The generalized
integrator is used for dividing frequency integral
control, while fuzzy arithmetic i ....etc

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ACTIVE FILTER DESIGN AND SPECIFICATION FOR CONTROL OF HARMONICS IN INDUSTRIAL AND COMMERCIAL FACILITIES
Abstract
Active filters have become a viable alternativefor controlling harmonic levels in industrial andcommercial facilities. However, there are manydifferent filter configurations that can beemployed and there is no standard method forrating the active filters. This paper describesthe active filter operation characteristics anddevelops standard ratings that can be used forfiltering different types of nonlinear loads.Limitations o ....etc

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