Low profile wide stop band microstrip filters for wireless communication applications using defected ground structures

2016 ◽  
Author(s):  
Juily Jagdish Saptarshi ◽  
Uday Pandit Khot
Keyword(s):  
Wireless Communication ◽  
Stop Band ◽  
Low Profile ◽  
Microstrip Filters ◽  
Defected Ground Structures ◽  
Ground Structures

scholarly journals Configurable Defected Ground Structures for Low Profile Antenna Performance Enhancement

2020 ◽  
Author(s):  
Yujie Zhang ◽  
Zixiang Han ◽  
Shanpu Shen ◽  
Chi Yuk Chiu ◽  
Ross Murch
Keyword(s):  
Mutual Coupling ◽  
Performance Enhancement ◽  
Single Port ◽  
Axial Ratio ◽  
Cross Polarization ◽  
Antenna Performance ◽  
Low Profile ◽  
Low Profile Antennas ◽  
Defected Ground Structures ◽  
Ground Structures

<div>Versatile configurable defected ground structures</div><div>(CDGSs) for enhancing the performance of low profile antennas are introduced. It is shown that CDGS can significantly reduce mutual coupling (MC) between multiple antennas and suppress cross-polarization (XP) and enhance circular polarization (CP) excitation in single port low profile antennas for example. The key idea of CDGS is to construct defected ground structures (DGSs) from a grid of slots, which can be either opened or shorted with hardwires, so that they can be configured and optimized to enhance desired antenna performance characteristics. The</div><div>importance and versatility of the CDGS approach is that it</div><div>overcomes the issue of having to design bespoke DGS for each individual antenna design. Three design examples are provided to demonstrate the versatility of CDGSs for MC reduction, XP suppression and CP excitation. Experimental results demonstrate that MC can be reduced by up to 43 dB, XP can be suppressed by 15 dB and CP can be excited with 78 MHz (2.2%) 3-dB axial ratio (AR) bandwidth. The compactness and ease of fabrication also make the CDGS well suited to compact low profile internet of things (IoT) and wireless communication applications.</div>

Scanning Enhanced Low-Profile Broadband Phased Array With Radiator-Sharing Approach and Defected Ground Structures

2017 ◽  
Vol 65 (11) ◽  
pp. 5846-5854 ◽  
Author(s):  
Li Gu ◽  
Yan-Wen Zhao ◽  
Qiang-Ming Cai ◽  
Zhi-Peng Zhang ◽  
Bi-Hui Xu ◽  
...  
Keyword(s):  
Phased Array ◽  
Low Profile ◽  
Defected Ground Structures ◽  
Ground Structures

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.

scholarly journals Configurable Defected Ground Structures for Low Profile Antenna Performance Enhancement

2020 ◽  
Author(s):  
Yujie Zhang ◽  
Zixiang Han ◽  
Shanpu Shen ◽  
Chi Yuk Chiu ◽  
Ross Murch
Keyword(s):  
Mutual Coupling ◽  
Performance Enhancement ◽  
Single Port ◽  
Axial Ratio ◽  
Cross Polarization ◽  
Antenna Performance ◽  
Low Profile ◽  
Low Profile Antennas ◽  
Defected Ground Structures ◽  
Ground Structures

<div>Versatile configurable defected ground structures</div><div>(CDGSs) for enhancing the performance of low profile antennas are introduced. It is shown that CDGS can significantly reduce mutual coupling (MC) between multiple antennas and suppress cross-polarization (XP) and enhance circular polarization (CP) excitation in single port low profile antennas for example. The key idea of CDGS is to construct defected ground structures (DGSs) from a grid of slots, which can be either opened or shorted with hardwires, so that they can be configured and optimized to enhance desired antenna performance characteristics. The</div><div>importance and versatility of the CDGS approach is that it</div><div>overcomes the issue of having to design bespoke DGS for each individual antenna design. Three design examples are provided to demonstrate the versatility of CDGSs for MC reduction, XP suppression and CP excitation. Experimental results demonstrate that MC can be reduced by up to 43 dB, XP can be suppressed by 15 dB and CP can be excited with 78 MHz (2.2%) 3-dB axial ratio (AR) bandwidth. The compactness and ease of fabrication also make the CDGS well suited to compact low profile internet of things (IoT) and wireless communication applications.</div>

scholarly journals A Research on Microstrip Ultrawide Band Filters using Defected Ground Structure Techniques

2019 ◽  
Vol 8 (10) ◽  
pp. 2147-2153
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Ground Plane ◽  
Vital Role ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Microstrip Filters ◽  
Low Pass ◽  
Defected Ground Structures

In this paper, microstrip ultra-wideband (UWB) filters using various defected ground structures are studied. Miniature microstrip filters employed in transceiver of modern wireless communication systems play vital role in controlling and regulating frequency response. DGS techniques are etched in ground plane to design compact microstrip based low pass, high pass, bandpass and band reject filters used in modern wireless systems. Various modified and hybrid defected ground structure techniques are employed to achieve high return loss, low insertion loss, ultra compactness, good selectivity and linearity in filters. Study reveals that the proper selection and incorporation of DGS techniques while designing microstrip ultra wideband filter optimizes the various vital parameters which enhances its performance and practicability for various modern wireless communication applications.

Phase shifter with high phase shifts using defected ground structures

2005 ◽  
Vol 41 (4) ◽  
pp. 196 ◽  
Author(s):  
S.M. Han ◽  
C.-S. Kim ◽  
D. Ahn ◽  
T. Itoh
Keyword(s):  
Phase Shifter ◽  
Phase Shifts ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
High Phase
Sign in / Sign up

Export Citation Format

Share Document