Synthesis of microstrip lowpass filter using defected ground structures

Verma, A.K.; Kumar, Ashwani

doi:10.1049/iet-map.2011.0071

Cited by 36 publications

(22 citation statements)

References 8 publications

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“…In fact the proposed UWB BPF is designed based on the method of cascading low-pass filter (LPF) and high-pass filter (HPF) together [13]. Due to its inherent advantages, employing DGS in order to create compact microwave filters with high-performance is one of the most common and important methods which can effectively be used in various microwave components and circuits [25][26]. The DGS in this paper is employed to create a LPF which can be modeled as a LC resonator, [23].…”

Section: Filter Design and Configurationmentioning

confidence: 99%

“…The DGS in this paper is employed to create a LPF which can be modeled as a LC resonator, [23]. Wider stop-band and high skirt-selectivity at upper frequencies is achieved by using two pairs of symmetric E-shaped DGSs with different sizes as can be seen in Fig.1 (c) [15], [26]. In the current filter design the lower stop-band of the UWB BPF is obtained and improved by the use of short-circuited bent stubs and moreover in order to miniaturize the size of the filter the short-circuited stubs are bent.…”

Section: Filter Design and Configurationmentioning

confidence: 99%

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A new design of compact dual band-notch UWB BPF based on coupled wave canceller

Abbasilayegh

Nourinia

Ghobadi

et al. 2014

7'th International Symposium on Telecommunications (IST'2014)

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The procedure of attaining a compact bandpass filter (BPF) with dual band-notch function for ultra-wideband (UWB) applications is presented and discussed in this paper. In the proposed BPF defected ground structure (DGS) is used in order to improve the out-of-band performance of the filter and also four short-circuited bent stubs are employed in order to improve the selectivity of the filter at its cut-off frequencies. Dual band-notch function is added to the performance of the filter by coupling two short-circuited inverted T-shaped stubs to the filter main resonator. The fabricated filter satisfies well the demands of the Federal Communications Committee (FCC) with two narrow band-notch functions at 5.5 GHz and 8 GHz which eliminates the interference of the UWB system with WLAN and satellite communication systems, respectively. The improved upper stop-band of the proposed filter with more than 20dB attenuation level extends up to 20 GHz.

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Section: Filter Design and Configurationmentioning

confidence: 99%

Section: Filter Design and Configurationmentioning

confidence: 99%

A new design of compact dual band-notch UWB BPF based on coupled wave canceller

Abbasilayegh

Nourinia

Ghobadi

et al. 2014

7'th International Symposium on Telecommunications (IST'2014)

View full text Add to dashboard Cite

show abstract

“…DGS is a configuration of defect in the ground plane of the antenna. These defects can affect the current distribution in the ground plane, which can change the parameters like capacitance and inductance . While designing the antenna, to acquire the required results we can add DGS at different positions in the ground plane .…”

Section: Introductionmentioning

confidence: 99%

CSRR‐loaded T‐shaped MIMO antenna for 5G cellular networks and vehicular communications

Rao

Madhav

Krishna

et al. 2019

Int J RF Microw Comput Aided Eng

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This article proposes a multiple input multiple output (MIMO) antenna for 5G‐based vehicular communication applications. The designed MIMO antenna consist of two element iterated T‐shape antenna with defected ground structure (DGS) and split ring resonator. The antenna providing reflection coefficient S11 s11 ≤10 dB and bandwidth of 6.3 and 3.96 GHz over the frequency range of 26.83 to 33.13 GHz and 34.17 to 38.13 GHz, respectively. For the suitable future vehicular millimetric wave communications, this antenna achieved resonant frequencies at 28, 33, and 37 GHz. The designed antenna has achieved peak gain of 7.11 dB in operating band. It is fabricated on 12 x 25.4 x 0.8 mm3 Rogers RT duroid 5880 substrate with dielectric constant (εr) of 2.2. The antenna is placed on vehicle in virtual environmental using ANSYS SAVANT tool and the simulated results are showing good matching with the measured results of proposed MIMO antenna.

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“…The filters designed to realize filtennas, used technique such as defected ground structure (DGS), resonators and substrate integrated waveguide (SIW) cavities. In past year researcher's show various DGS based filters and employed different shapes such as Square headed dumbbell shaped DGSs (SQ‐DB‐DGSs), U‐shaped DGSs (U‐DGSs), complementary split ring resonators (SCSRRs), meander multimode DGS resonators (MMDGSRs), equilateral triangle headed dumbbell shaped DGSs (ET‐DB‐DGSs) and inter‐digital shaped defected ground structures (IDS‐DGSs). Another way to realize microwave filter includes modifying the transmission line as a resonator circuit or placing resonator near to the transmission line.…”

Section: Introductionmentioning

confidence: 99%

Filtennas for wireless application: A review

Mishra

Lalitha

2019

Int J RF Microw Comput Aided Eng

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In recent year, various filtenna circuits have been developed satisfying the objectives and prerequisites of wireless communication. Some of these developed designs are new or some are the improved version of previous works whereas the others are the combination of conventional methods. This article presents the review of filtenna circuits starting from the beginning to the improvements until date. This article starts with brief overview of various filters with their design strategies and ends in its implementation in filtenna designs followed by discussion on several filtenna designs in term of size and overall performances. Among various designs, bandpass, and bandstop filters are extensively used in filtenna realization as it provides a better selectivity in desired band. Various planar filtenna circuits, based on either defected ground structure (DGS) or resonator or SIW filters are reviewed and presented. Besides, planar filtennas, these filters are also integrated to the aperture of horn antennas for the realization of horn filtennas, applicable for high frequency operations. It is observed that SIW based filtennas exhibited narrow impedance bandwidth. This feature can be improved by doubling substrate layer as well as the number of metallic ways. Whereas, resonator based filtennas use resonator based filters along with DGSs to enhance impedance bandwidth as well as minimize mutual coupling and cross‐polar radiation. Apart from single element filtenna, filtenna arrays, and reconfigurable filtennas (including planar and horn reconfigurable filtennas) are presented. This review article may be helpful for beginners working on filtenna circuits and also such a review process is not available in the open literature to the best of author's knowledge.

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Synthesis of microstrip lowpass filter using defected ground structures

Cited by 36 publications

References 8 publications

A new design of compact dual band-notch UWB BPF based on coupled wave canceller

A new design of compact dual band-notch UWB BPF based on coupled wave canceller

CSRR‐loaded T‐shaped MIMO antenna for 5G cellular networks and vehicular communications

Filtennas for wireless application: A review

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