Design of wide stopband lowpass filter using transformed radial stub based on substrate integrated suspended line technology

2020 ◽  
Author(s):  
Huan Zhang ◽  
Kaixue Ma ◽  
Haipeng Fu ◽  
Ningning Yan
Keyword(s):  
Lowpass Filter ◽  
Radial Stub ◽  
Line Technology

DGS embedded transformed radial stub for ultra-wide stopband lowpass filter

2012 ◽  
Vol 48 (23) ◽  
pp. 1473 ◽  
Author(s):  
S. Xu ◽  
K. Ma ◽  
F. Meng ◽  
K.S. Yeo
Keyword(s):  
Lowpass Filter ◽  
Radial Stub

Microstrip lowpass filter with wide stopband and sharp roll-off using modified radial stub resonator

2016 ◽  
Vol 9 (3) ◽  
pp. 499-504 ◽  
Author(s):  
Mohsen Hayati ◽  
Mehrnaz Khodadoost ◽  
Hamed Abbasi
Keyword(s):  
Transmission Lines ◽  
Insertion Loss ◽  
Return Loss ◽  
Lowpass Filter ◽  
Transition Band ◽  
Attenuation Level ◽  
Radial Stub ◽  
Better Than ◽  
Good Agreement

In this paper, a microstrip lowpass filter with wide stopband and sharp roll-off is presented. The proposed filter consists of a modified radial stub resonator which is cascaded by four suppressing cells. To reduce the overall size, the transmission lines are folded. The cut-off frequency of the proposed filter is 1.19 GHz. The transition band is approximately 0.2 GHz from 1.19 to 1.39 GHz with corresponding attenuation levels of 3–20 dB. The stopband is from 1.39 to 19 GHz with attenuation level of <20 dB. The insertion loss and return loss in the passband from DC to 0.8 GHz are better than 0.26 and 14 dB, respectively. The proposed filter is fabricated and measured. The simulated and measured results are in good agreement.

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

Quasi-elliptic DSPSL lowpass filter with shunt stepped-impedance stubs

2006 ◽  
Vol 49 (2) ◽  
pp. 476-477 ◽  
Author(s):  
Jian-Xin Chen ◽  
Ching-Hong K. Chin ◽  
Quan Xue
Keyword(s):  
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
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