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Co-designed defected ground structure filter with UWB slot antenna
摘要： In this study, one kind of novel co-designed defected ground structure (DGS) filter with slot antenna is proposed to realize bandpass reflection coefficient and gain performance. This antenna consists of two parts: 1) a 50 Ω feeding line and 2) a modified stepped slot with additional narrow slot and defected ground structure. The extra narrow slot, which can effectively prolong the current path of low frequency and generate reflection zero, is introduced to improve the lower band-edge selectivity. DGS is used to improve the upper band-edge selectivity, which can produce transmission zeros in certain frequencies and provides excellent stopband characteristics. In addition, the modified stepped slot with DGS can produce additional resonance frequency, which is helpful to improve the in-band impedance characteristics and radiation efficiency of the antenna. Measured results show that not only the band-edge selectivity of the antenna is improved, but also the in-band impedance matching and radiation efficiency are improved. The experimental results show that the proposed design could be a good candidate for UWB applications.
关键词： UWB antenna,defected ground structures (DGS),band-edge selectivity
更新于2025-09-23 15:23:52
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[IEEE 2019 14th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS) - Nis, Serbia (2019.10.23-2019.10.25)] 2019 14th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS) - Wave Digital Model of Edge Coupled Filter Based on Halfwave Coupled Resonator with Dumbbell-Shaped DGS
摘要： This research investigates the application of a halfwave coupled resonator employing dumbbell placed in the ground plane (DGS) that is used to design wideband filter. A type of microstrip bandpass filter (BPF) based on edge coupled DGS resonators is designed using Chebyshev approximation. By using admittance inverters, a wave digital model of microstrip bandpass filter with only one kind of resonator can be generated more conveniently. In order to validate the theoretical predictions and simulated results, a fifth order BPF is fabricated and experimentally verified. The measured and wave-based results have shown a good agreement.
关键词： Defected ground structure (DGS),Wave digital model,Bandpass filter,Coupled resonator
更新于2025-09-23 15:21:01
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[IEEE 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Rome, Italy (2019.6.17-2019.6.20)] 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Defected Ground Structure for Characteristic Enhancement of CSRR-based Substrate Integrated Waveguide BPF
摘要： Defected ground structure (DGS) is frequently involved to improve the characteristic response of microwave devices. In this paper, investigation of DGS utilization for characteristic enhancement of substrate integrated waveguide (SIW) bandpass filter (BPF) composed of complimentary-split-ring-resonator (CSRR) is presented. The filter is deployed on an FR4 epoxy dielectric substrate with the thickness of 1.6 mm and the dimension of 45 mm × 40 mm. The BPF which is designed by two reversely arranged CSRR incorporated on the SIW conductor surface provides passband extension at higher frequency producing the bandwidth response around 9 GHz. However, the use of CSRR also provides some unsatisfactory response at high frequency region requiring for the enhancement. By involving DGS into the BPF, the characteristic response at high frequency region could be enhanced with the bandwidth response achieves up to 10% improved.
关键词： microwave devices,Defected ground structure (DGS),bandpass filter (BPF),complimentary-split-ring-resonator (CSRR),substrate integrated waveguide (SIW)
更新于2025-09-23 15:21:01
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[IEEE 2018 18th Mediterranean Microwave Symposium (MMS) - Istanbul, Turkey (2018.10.31-2018.11.2)] 2018 18th Mediterranean Microwave Symposium (MMS) - Miniaturized and Circularly Polarized Inverted C Shaped Patch Antenna for X and Ku Bands Applications
摘要： This paper presents a miniaturized inverted C shaped patch antenna with defected ground structure (DGS), which exhibits an axial ratio bandwidth (ARBW) of 1.1 GHz (from 11.79 GHz to 12.89 GHz) within an impedance bandwidth (IBW) of 6.9 GHz (from 9.1 GHz to 16 GHz), with a maximum realized gain of 3.23 dBi. The antenna size is only 15x10x1.524 mm3. These features make the proposed antenna the best candidate for compactness wireless applications such as radar, satellite communications, and wireless computer networks.
关键词： circularly polarized patch antenna,patch antennas,defected ground structure (DGS),Miniaturized patch antenna
更新于2025-09-19 17:15:36
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A NOVEL COUPLED-DEFECTED GROUND STRUCTURE WITH ENHANCED COUPLING-COEFFICIENT AND ITS APPLICATION IN FILTER DESIGN
摘要： A novel coupled-defected ground structure (C-DGS) with inductors inserted between the adjacent defected ground structure (DGS) cells is presented in this paper. In comparison to conventional C-DGS structure, the proposed C-DGS exhibits a larger coupling-coe?cient, resulting in a wider stop-band. Moreover, the stopband can be adjusted ?exibly without modi?cation since the coupling-coe?cient varies with the change of the inductance of the inserted inductor. Based on this new C-DGS, a low-pass ?lter (LPF) using cascaded C-DGS is constructed. The proposed structure is experimentally veri?ed through the demonstration of a low-pass ?lter design.
关键词： stopband,coupling-coe?cient,C-DGS,coupled-defected ground structure,low-pass ?lter
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) - Nanjing, China (2019.8.28-2019.8.30)] 2019 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) - Wideband Bandpass Filters Using Half-Mode Corrugated Substrate Integrated Waveguide
摘要： A wideband bandpass filter is proposed in this paper, the filter combine half-mode corrugated substrate integrated waveguide (HMCSIW) with improved dumbbell defected ground structures (DGSs). The HMCSIW technique can operate similarly with the traditional half-mode substrate integrated waveguide (HMSIW). Differently, it provides a completely floating conductor without metallic via holes. Combining two technologies together, a design of HMCSIW wideband bandpass filter (BPF) is proposed in the paper. The presented BPFs can operate in a wide band without a short circuit between different metal layers and will be widely used in integration with other RF circuits.
关键词： DGS,HMCSIW,defected ground structures,wideband bandpass filter,half-mode corrugated substrate integrated waveguide
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Chengdu, China (2019.5.10-2019.5.13)] 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Compact Substrate Integrated Waveguide Bandpass Filter with Back-to-Back Dual-G-Shaped Stepped Impedance Resonator
摘要： A compact substrate integrated waveguide bandpass filter (SIW-BPF) with back-to-back dual-G-shaped stepped impedance resonator (DGS-SIR) pair is proposed. The DGS-SIR is etched on the top layer of the SIW. As a result, the proposed SIW-BPF loaded by DGS-SIR supports forward-wave propagation below the cutoff frequency of the SIW. Moreover, two transmission zeros (TZs) are generated in both sides of the passband. Consequently high selectivity, sharp roll-off, and compact size have been achieved. To validate the proposed design concept a compact SIW-BPF with DGS-SIR operating at 3 GHz has been designed and fabricated using microstrip and printed circuit board (PCB) technology. The measured results are in good agreement with the full-wave simulated results.
关键词： dual-G-shaped stepped impedance resonator (DGS-SIR),substrate integrated waveguide (SIW),compact,bandpass filter (BPF)
更新于2025-09-16 10:30:52
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Design of Dual Band and Tri-band Bandpass Filter (BPF) with Improved Inter-band Isolation Using DGS Integrated Coupled Microstrip Lines Structures
摘要： A novel approach to design dual-band as well as a triple-band BPF with improved isolation is ventured in this paper. In dual-band filter, dual mode property of coupled line filters is utilized to obtain resonant frequencies at 2.4 GHz and 7.4 GHz suitable for WLAN and WiMAX application respectively. Additionally a rectangular-ring DGS element is introduced within the coupled line filter to obtain a separate mid-band resonance at 5.2 GHz. The frequency shifting property of the pass bands due to cross-coupling between the microstrip line resonators and the DGS element is mostly eliminated by implementing stepped impedance open stub (SIOS) technique. All filter configurations are fabricated, measured and compared with the simulated models to validate the practical effectiveness. Stop band isolation > 40 dB and insertion loss (IL) < 0.8 dB is attained in all the filter configurations.
关键词： Defected ground structure (DGS),Band pass filter (BPF),Microstrip coupled line,Stepped impedance open stub (SIOS)
更新于2025-09-11 14:15:04
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[IEEE 2018 Conference on Emerging Devices and Smart Systems (ICEDSS) - Tiruchengode, India (2018.3.2-2018.3.3)] 2018 Conference on Emerging Devices and Smart Systems (ICEDSS) - Enhancement of Isolation in Dual-band Hemispherical DRA using DGS for MIMO Systems
摘要： A simple compact novel hemispherical DRA (HDRA) for isolation improvement with rectangular shaped slot Defected Ground Structure (DGS) is proposed. Length of the slot on the ground plane plays a vital role to enhance the isolation. An optimized length of the slot of b=4.5cm on PEC ground plane offers an isolation of -30dB and impedance bandwidth (S11< - 10dB) of 15.6% with return loss -42.5dB at 2.412GHz and - 23.3dB isolation with -18dB return loss at 4.216GHz. The proposed geometry resonates at two bands, primarily at ISM band and it is best suitable for Bluetooth, Wi-Fi, WiMax, WLAN and Satellite and radar applications in S-band.
关键词： DGS,DRA,Dual band,Isolation
更新于2025-09-09 09:28:46
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DESIGN OF COMPACT RECONFIGURABLE BROADBAND BAND-STOP FILTER BASED ON A LOW-PASS FILTER USING HALF CIRCLE DGS RESONATOR AND MULTI-LAYER TECHNIQUE
摘要： This paper describes the design of a two-pole low-pass and band-stop ?lters. The low-pass structure is designed at the cuto? frequency of 2 GHz for the L-Band applications. This architecture uses half circle defected ground structure HCDGS instead full circle DGS resonator. Both the HCDGS shapes are etched in the ground plane and coupled via a substrate with a compensated capacitor. The rejection bandwidth of the LPF covers a large wideband spectrum. Therefore, the band suppression reaches more than 3f c. The ?lter is simulated and fabricated. The measured results are in good agreement with the full-wave simulated ones, showing the merits of compact size and sharp roll-o?. The multi-layer technique has been used in order to realize a transformation from low-pass behaviours to band-stop characteristics, keeping the same passband features. The new extracted band-stop topology is simulated and optimized using an RO4003 substrate with relative permittivity of 3.38 and thickness of h = 0.813 mm. The structure has a wide stopband with over 20 dB rejection from 3.5 GHz to 8.5 GHz. Such ?lters can be used for L-band and military applications.
关键词： compact,reconfigurable,broadband band-stop filter,half circle DGS resonator,low-pass filter,multi-layer technique
更新于2025-09-09 09:28:46