scholarly journals Low Cost Design and Fabrication of Microstrip Stepped-Impedance Low-Pass Filter by using FR-4 substrate

2020 ◽  
Author(s):  
Yusuke Kusama ◽  
Ryosuke Yamashita ◽  
Naoki Komatsu ◽  
Yohei Seki ◽  
Haruki Fujita
Keyword(s):  
Low Cost ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

Rapid Recovery of Wide-Bandwidth Photothermal Signals via Homodyne Photothermal Spectrometry: Theory and Methodology

1993 ◽  
Vol 47 (4) ◽  
pp. 489-500 ◽  
Author(s):  
J. F. Power ◽  
M. C. Prystay
Keyword(s):  
High Frequency ◽  
Low Cost ◽  
Signal Recovery ◽  
Wide Bandwidth ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Output ◽  
Low Pass ◽  
Four Quadrant ◽  
Lock In

Homodyne photothermal spectrometry (HPS) is a very wide bandwidth signal recovery technique which uses many of the elements of lock-in detection at very low cost. The method uses a frequency sweep, with a high-frequency bandwidth of up to 10 MHz, to excite a linear photothermal system. The response sweep of the photothermal system is downshifted into a bandwidth of a few kilohertz by means of in-phase mixing with the excitation sweep with the use of a four-quadrant double-balanced mixer and a low-pass filter. Under conditions derived from theory, the filter output gives a good approximation to the real part of the photothermal system's frequency response, dispersed as a function of time. From a recording of this signal, the frequency and impulse response of the photothermal system are rapidly recovered at very high resolution. The method has been tested with the use of laser photopyroelectric effect spectrometry and provides an inexpensive, convenient method for the recovery of high-frequency photothermal signals.

An experimental analog circuit realization of Matsuda’s approximate fractional-order integral operators for industrial electronics

2021 ◽  
Author(s):  
Murat Koseoglu ◽  
Furkan Nur Deniz ◽  
Baris Baykant Alagoz ◽  
Ali Yuce ◽  
Nusret Tan
Keyword(s):  
Fractional Order ◽  
Analog Circuit ◽  
Low Cost ◽  
Electric Circuit ◽  
Partial Fraction ◽  
Circuit Realization ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Performance Improvements ◽  
Low Pass

Abstract Analog circuit realization of fractional order (FO) elements is a significant step for the industrialization of FO control systems because of enabling a low-cost, electric circuit realization by means of standard industrial electronics components. This study demonstrates an effective operational amplifier-based analog circuit realization of approximate FO integral elements for industrial electronics. To this end, approximate transfer function models of FO integral elements, which are calculated by using Matsuda’s approximation method, are decomposed into the sum of low-pass filter forms according to the partial fraction expansion. Each partial fraction term is implemented by using low-pass filters and amplifier circuits, and these circuits are combined with a summing amplifier to compose the approximate FO integral circuits. Widely used low-cost industrial electronics components, which are LF347N opamps, resistor and capacitor components, are used to achieve a discrete, easy-to-build analog realization of the approximate FO integral elements. The performance of designed circuit is compared with performance of Krishna’s FO circuit design and performance improvements are shown. The study presents design, performance validation and experimental verification of this straightforward approximate FO integral realization method.

scholarly journals Design of Reconfigurable Bandwidth Filtering Antenna and Its Applications in IR/UWB System

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 163
Author(s):  
Zhuohang Zhang ◽  
Zhongming Pan
Keyword(s):  
System Design ◽  
Time Domain ◽  
Low Cost ◽  
Impulse Radio ◽  
Dynamic Adjustment ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Compact Size ◽  
Low Pass ◽  
Communication Frequency

A reconfigurable bandwidth antenna for an impulse radio-UWB (IR/UWB) system design is illustrated in this paper. By adopting a continuously tunable low-pass filter by varactor at the feed of the antenna, the proposed antenna obtains a continuous tunable bandwidth from 1.02 GHz to 2.42 GHz. To ensure the identifiability of transmitted pulses in (IR-UWB) system, the antenna is analyzed in both frequency domain and time domain. The proposed antenna is valid with a system fidelity factor (SFF) above 0.8 while the bandwidth is tuning. The compact size, low cost, and tunable bandwidth with the identifiability of the transmitted pulse makes it suitable for UWB impulse radars to improve the utility ratio of frequency, and dynamic adjustment avoids interference of the IR-UWB in other communication frequency bands.

scholarly journals Application of Empirical Wavelet Transform in Digital Image Watermarking

2020 ◽  
Vol 37 (5) ◽  
pp. 839-845
Author(s):  
Mohammad Keivani ◽  
Amir Mahdi Sazdar ◽  
Jalil Mazloum ◽  
Akram Esvand Rahmani
Keyword(s):  
Wavelet Transform ◽  
Image Watermarking ◽  
Low Cost ◽  
Original Data ◽  
Point Of View ◽  
Security Requirements ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Empirical Wavelet Transform ◽  
Low Pass

Nowadays, rapid growth of the Internet and digital multimedia technologies make it possible to duplicate data without any loss of quality and at a very low cost. In this regard, manipulation of documents will easily be accomplished by applying digital art and without the copyright owner's permission. To deal with situation, more diverse security requirements are introduced every day. Watermarking is considered as one of the methods used for achieving this purpose. Watermarking is focused on inserting a subtle signal between the host media data somehow it does not change the original data, but they can be extracted if necessary. They are also used as a claim for ownership of the digital effect. Various methods have been presented for watermarking so far. These methods have been developed to overcome the weaknesses of previous methods. Empirical wavelet transform is taken into account as a new method for hiding and extracting military digital images with respect to alpha composition. As such, it is resistant to noise, low pass filter and compression. Analytical studies showed that this method is more efficient than other methods from quantitative and qualitative point of view.

Sensitivity analysis of a 3-D printed low-cost compact waveguide low-pass filter

2016 ◽  
Author(s):  
F. Teberio ◽  
A. Gomez-Torrent ◽  
I. Arregui ◽  
J. M. Percaz ◽  
I. Arnedo ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Low Cost ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Compact Waveguide

Design of Tunable F-P Filter Driver Based on FPGA

2014 ◽  
Vol 602-605 ◽  
pp. 2680-2683
Author(s):  
Xu Han ◽  
Peng Wang ◽  
Si Wen Cai ◽  
Yan Ling Xiong ◽  
Kai Yu Zhang
Keyword(s):  
Frequency Synthesizer ◽  
Frequency Control ◽  
Low Cost ◽  
Control Word ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Field Programmable ◽  
Low Pass ◽  
Practical Engineering ◽  
Stable Performance

The special driver for tunable F-P filter is expensive, so it has an important application value to design a driver with stable performance and low cost. In this paper, the field programmable gate array (FPGA) was chosen as the core chip to constitute triangular signal generator based on direct digital frequency synthesizer (DDS). The output frequency of waveform ROM look-up table will be altered by changing frequency control word. Then, the products of amplitude word and signals of ROM table output were transmitted to DAC to be converted into analog signal. The variable frequency and amplitude modulation signals were got after smoothed by low pass filter. The frequency range of driving signal is 1 Hz~10 KHz, and the resolution of frequency is 0.1 Hz. The amplitude range is 1 V~10 V, and the resolution of amplitude is 0.1 V. The simulation and experimental results show that the driver has the characteristics of simple structure, stable signal, adjustable frequency and amplitude and lower cost. It can satisfy the requirements of tunable F-P filter driven in practical engineering.

Design of Programmable Wideband Low Pass Filter with Continuous-Time/Discrete-Time Hybrid Architecture

2017 ◽  
Vol E100.C (10) ◽  
pp. 858-865 ◽  
Author(s):  
Yohei MORISHITA ◽  
Koichi MIZUNO ◽  
Junji SATO ◽  
Koji TAKINAMI ◽  
Kazuaki TAKAHASHI
Keyword(s):  
Discrete Time ◽  
Continuous Time ◽  
Hybrid Architecture ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

ANALYSIS AND IMPROVEMENT TECHNIQUES FOR THE TRANSFER FUNCTION OF A PLANAR LOW - PASS FILTER

2016 ◽  
Vol 15 (12) ◽  
pp. 2579-2586
Author(s):  
Adina Racasan ◽  
Calin Munteanu ◽  
Vasile Topa ◽  
Claudia Pacurar ◽  
Claudia Hebedean
Keyword(s):  
Transfer Function ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass
Sign in / Sign up

Export Citation Format

Share Document