Compact microstrip lowpass filter with sharp roll‐off and ultra‐wide stop‐band

2013 ◽  
Vol 49 (18) ◽  
pp. 1159-1160 ◽  
Author(s):  
M. Hayati ◽  
A. Abdipour ◽  
A. Abdipour
Keyword(s):  
Stop Band ◽  
Lowpass Filter

Design of Microstrip Lowpass Filter with Sharp Roll-off using Elliptical and Radial Resonators

Frequenz ◽  
2017 ◽  
Vol 71 (7-8) ◽  
Author(s):  
Gholamreza Karimi ◽  
Saeedeh Lotfi ◽  
Hesam Siahkamari
Keyword(s):  
High Performance ◽  
Stop Band ◽  
Lowpass Filter

AbstractA new microstrip lowpass filter with sharp roll-off and high suppression level in stop-band is presented. To achieve the lowpass filter with high performance, coupled T-shaped, elliptical and radial resonators are adopted. New formulas for calculating

Compact lowpass filter with wide stop-band using coupled-line hairpin unit

2010 ◽  
Vol 46 (1) ◽  
pp. 88 ◽  
Author(s):  
F. Wei ◽  
L. Chen ◽  
X.-W. Shi ◽  
Q.-L. Huang ◽  
X.-H. Wang
Keyword(s):  
Stop Band ◽  
Lowpass Filter ◽  
Coupled Line

Compact LowPass Filter with Wide StopBand Using Non-Uniform Microstrip Resonant Cells

2012 ◽  
Vol 263-266 ◽  
pp. 15-19
Author(s):  
Yan Liang ◽  
Xiao Ming Wu ◽  
Bi Hua Tang ◽  
Yong Le Wu
Keyword(s):  
Microstrip Line ◽  
Photonic Bandgap ◽  
Impedance Matching ◽  
Stop Band ◽  
Cutoff Frequency ◽  
Harmonic Suppression ◽  
Lowpass Filter ◽  
Measurement Results ◽  
Better Than

In this paper, a novel compact microstrip lowpass filter is designed. The proposed filter which is etched on the 50 Ω microstrip line consists of four non-uniform 1-D microstrip photonic bandgap (PBG) cells with different cutoff frequency.. The demonstration lowpass filter with 2.2 GHz cutoff frequency is designed, fabricated and measured. The measurement results show that the band rejection effect is better than -20 dB from 2.8 GHz to 10 GHz, the insertion is less than 2 dB, and the length of filter is 5.6 cm long. Compared with the conventional filter, the proposed filter has smaller size. Meanwhile, it overcomes the problems of narrow stop-band and low harmonic suppression. Furthermore, the impedance matching is not need to be considered. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Compact microstrip lowpass filter with sharp roll-off and wide stop-band

2009 ◽  
Vol 45 (2) ◽  
pp. 110 ◽  
Author(s):  
J.-L. Li ◽  
S.-W. Qu ◽  
Q. Xue
Keyword(s):  
Stop Band ◽  
Lowpass Filter

A practical approach on non-regular sampling and universal demosaicing of raw image sensor data

2020 ◽  
Vol 2020 (1) ◽  
pp. 91-95
Author(s):  
Philipp Backes ◽  
Jan Fröhlich
Keyword(s):  
Image Quality ◽  
Source Code ◽  
Image Sensor ◽  
Sensor Data ◽  
Color Filter ◽  
Lowpass Filter ◽  
Sampling Errors ◽  
Regular Sampling ◽  
Single Sensor ◽  
Similar Image Quality

Non-regular sampling is a well-known method to avoid aliasing in digital images. However, the vast majority of single sensor cameras use regular organized color filter arrays (CFAs), that require an optical-lowpass filter (OLPF) and sophisticated demosaicing algorithms to suppress sampling errors. In this paper a variety of non-regular sampling patterns are evaluated, and a new universal demosaicing algorithm based on the frequency selective reconstruction is presented. By simulating such sensors it is shown that images acquired with non-regular CFAs and no OLPF can lead to a similar image quality compared to their filtered and regular sampled counterparts. The MATLAB source code and results are available at: http://github. com/PhilippBackes/dFSR

Angle and polarization-independent miniaturized UWB FSS design

2021 ◽  
pp. 1-9
Author(s):  
Yanning Yuan ◽  
Yuchen Zhao ◽  
Xiaoli Xi
Keyword(s):  
Design Method ◽  
Incident Angle ◽  
Stop Band ◽  
Single Layer ◽  
Wireless Systems ◽  
Frequency Selective Surface ◽  
Ultra Wideband ◽  
Band Frequency ◽  
Gain Enhancement ◽  
Polarization Independent

Abstract A single-layer ultra-wideband (UWB) stop-band frequency selective surface (FSS) has several advantages in wireless systems, including a simple design, low debugging complexity, and an appropriate thickness. This study proposes a miniaturized UWB stop-band FSS design. The proposed FSS structure consists of a square-loop and metalized vias that are arranged on a single layer substrate; it has an excellent angle and polarization-independent characteristics. At an incident angle of 60°, the polarization response frequencies of the transverse electric and magnetic modes only shifted by 0.003 f0 and 0.007 f0, respectively. The equivalent circuit models of the square-loop and metallized vias structure are analysed and the accuracy of the calculation is evaluated by comparing the electromagnetic simulation. The 20 × 20 array constitutes an FSS reflector with a unit size of 4.2 mm × 4.2 mm (less than one-twentieth of the wavelength of 3 GHz), which realizes an UWB quasi-constant gain enhancement (in-band flatness is <0.5 dB). Finally, the simulation results were verified through sample processing and measurement; consistent results were obtained. The FSS miniaturization design method proposed in this study could be applied to the design of passband FSS (complementary structure), antennas and filters, among other applications.

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