Ultra-wide stopband low-pass filter using multi-mode coupled defected ground structures

2008 ◽  
Author(s):  
Sheng Zhang ◽  
Fa-lin Liu ◽  
Hai-shun Cui
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Multi Mode

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

Design of an Active-Gm-RC Reconfigurable Filter for the Multi-Mode Receiver

2013 ◽  
Vol 364 ◽  
pp. 458-462
Author(s):  
Lei Qian ◽  
Xiang Ning Fan
Keyword(s):  
Power Consumption ◽  
Power Supply ◽  
Frequency Offset ◽  
Cmos Process ◽  
Rf Cmos ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Rc Structure ◽  
Low Pass ◽  
Multi Mode

Based on TSMC 0.18m RF CMOS process a reconfigurable low-pass filter (LPF) is presented in this paper. The LPF adopts active-Gm-RC structure. By manually adjusting the capacitor arrays, the LPF can switch working mode and correct frequency offset caused by process deviation. The pre-layout simulation shows that with 1.8V power supply, the bandwidth ranges from 1.4MHz to 9.8MHz with a step of 1.4MHz. The out of band attenuation is about-80dB/10 octave and the power consumption is 0.43mW .

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