A simple method to control the reject band of microstrip low pass filter using a new multi-ring defected ground structures (DGS)

2008 ◽  
Author(s):  
A. Boutejdar ◽  
A. Batmanov ◽  
A. Elsherbini ◽  
A. Omar ◽  
E.P. Burte
Keyword(s):  
Simple Method ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Defected Ground Structures ◽  
Ground Structures

Tunable Low-Pass MEMS Filter Using Defected Ground Structures (DGS)

2013 ◽  
Vol 712-715 ◽  
pp. 1798-1801 ◽  
Author(s):  
Xing Long Guo ◽  
Z.L. Wang ◽  
J. Huang ◽  
Z.J. Zhang ◽  
H.H. Yin ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Periodic Structures ◽  
Pass Band ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Mems Switches ◽  
Low Pass ◽  
Frequency Changes ◽  
Defected Ground Structures ◽  
Ground Structures

In this paper, fully monolithic tunable millimeter-wave filters using defected ground structures (DGS) are proposed using the CPW-based periodic structures with novel multiple-contact MEMS switches. Millimeter-wave low-pass filters were designed, fabricated, and tested. The cascaded CPW-based periodic structures, with low-pass intrinsic filtering characteristics, are reconfigured into a self-similar single unit cell by the operation of the novel multiple-contact MEMS switches with single actuation. In the first order tuning, the 3-dB cut-off frequency changes from 8.2GHz to10.5GHz, and the second order tuning is 8.2GHz to 16.8GHz. The tested results show that the pass-band ripple is less than 1.2dB and the maximal out-of-band rejection is better than 27dB. The chip size of the low-pass filter is 2.5mm×1.2mm.

An improved stopband and sharp roll off microstrip low pass filter with defected ground structures

2015 ◽  
Vol 8 (3) ◽  
pp. 573-581 ◽  
Author(s):  
Agâh Oktay Ertay ◽  
Mehmet Abbak ◽  
Serkan Şimşek
Keyword(s):  
Filter Design ◽  
Design Procedure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Frequency Structure Simulator ◽  
Microstrip Filters ◽  
Low Pass ◽  
Wave Research ◽  
Defected Ground Structures ◽  
Ground Structures

In this paper a novel low pass filter (LPF) design procedure is proposed for electromagnetic bandgap based microstrip filters without using classical filter design approach. LPF is designed for ultra-wide stopband and sharp roll-off rate via proposed design procedure. It has been shown that finite periodic fan-shaped defected ground structures (FSDGSs) and double radial stubs (DRSs) yield broad stopband and very sharp transition band. The proposed LPF has −3 dB passband from dc to 1.49 GHz, and −20 dB broad stopband from 1.65 GHz up to 7.41 GHz. Full wave electromagnetic (EM) simulation of the proposed filter is achieved with ANSYS's High Frequency Structure Simulator (HFSS) and equivalent circuit (EC) model of the filter is proposed and verified via Applied Wave Research (AWR) software. To verify the simulations, filter is realized on ARLON AD1000 substrate, and measured with Agilent 5245A PNA-X Vector Network Analyzer. Measurement results of fabricated filter are in good agreement with EM and EC simulations.

A novel low-pass filter using defected ground structures

2005 ◽  
Vol 46 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Xue-Hui Guan ◽  
Guo-Hui Li ◽  
Zhewang Ma
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Defected Ground Structures ◽  
Ground Structures

The Design of Active Low Pass Filter

2014 ◽  
Vol 541-542 ◽  
pp. 419-423
Author(s):  
Yi Cheng Liao ◽  
Hong Bo Zhao ◽  
Yi Jie Liu ◽  
Qi Yu
Keyword(s):  
Material Object ◽  
Simple Method ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Design And Manufacture

This paper is for the filter users. It introduces a simple method to design Butterworth active low pass filter. By means of calculating, simulating, making a material object and debugging, it verifies the feasibility of the method. Combining design with practice, it shows the merit and demerit, which is of great significance for the design and manufacture of filters.

A simple method to characterize the impedance of pyroelectric materials at ultra-low frequencies

2016 ◽  
Vol 28 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Murtadha A Shaheen ◽  
Ugur Erturun ◽  
Brandon Campbell ◽  
Karla Mossi
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Simple Method ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Polyvinylidene Difluoride ◽  
Filter Technique ◽  
Zirconate Titanate ◽  
Low Pass

The purpose of this work is to demonstrate a new simple stand-alone method of characterizing the impedance of a pyroelectric cell. This method utilizes a pyroelectric single pole low-pass filter technique. Utilizing the properties of a pyroelectric single pole low-pass filter technique, a known input voltage is applied and using simple equations, capacitance Cp and resistance Rp at a frequency range of 1 mHz to 1 Hz can be calculated. For verification purposes, an LCR meter and an impedance analyzer were exploited at 10 and 100 Hz, respectively. Results showed that Rp values for two materials, lead zirconate titanate-5A and polyvinylidene difluoride, were within 8%, and Cp values were within 7.5%. In addition, to verify the importance of the impedance values in energy harvesting applications, output power was measured with varying impedance values. The optimal load resistances for polyvinylidene difluoride and lead zirconate titanate-5A were consistent with the measured pyroelectric impedance at the particular heat range with 10.9% and 1.4%, respectively. The pyroelectric single pole low-pass filter method presented here demonstrates that for pyroelectric materials the impedance depends on two major factors: (1) average working temperature and (2) the heating rate. Neglecting these two factors can result in inefficient and unpredictable behavior of pyroelectric materials when used in energy harvesting applications.

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