Multi-Bandpass Filters Using Multi-Armed Open Loop Resonators with Direct Feed

Awida, Mohamed H.; Boutejdar, A.; Safwat, Amr M. E.; El‐Hennawy, Hadia; Omar, A.S.

doi:10.1109/mwsym.2007.380129

Cited by 32 publications

(36 citation statements)

References 8 publications

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“…The proposed DGS shape with its dimensions is shown in Figure 1. The equivalent circuit of the DGS is a parallel resonant circuit shown in Figure 2 [2], where L p and C p denote the equivalent inductance and capacitance (1). The etched gap area under the microstrip line corresponds to a capacitance and the metallic bridge between the DGS-arms is equivalent to a series inductance.…”

Section: Configuration Of the Hairpin-dgs Cellmentioning

confidence: 99%

“…In this work, we present a new hairpin-DGS structure to suppress higher harmonics and to realize sharp transitions from passband to stopband by introducing two transmission zeros in the filter response located on both sides of the passband [1]. The DGSs are used as magnetically coupled resonators and as a harmonic suppression resonator in the same time.…”

Section: Introductionmentioning

confidence: 99%

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Design of microstrip bandpass and lowpass filters using coupling matrix method and a new hairpin defected ground structure

Boutejdar

Omar

2008

Micro & Optical Tech Letters

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Section: Configuration Of the Hairpin-dgs Cellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of microstrip bandpass and lowpass filters using coupling matrix method and a new hairpin defected ground structure

Boutejdar

Omar

2008

Micro & Optical Tech Letters

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“…Sometimes, UWB planar antennas with frequency notch characteristics are designed to to suppress coexistence narrow-band systems and services like WLAN, WiMAX, c-, and x-band wireless systems [3,4]. These frequency bands could be rejected with band stop filters, but this approach would increase the system complexity [5]. So it is necessary to design the UWB antenna with band notched characteristic with reduced complexity and cost.…”

Section: Introductionmentioning

confidence: 99%

A Planar UWB Antenna with Dual Band Rejection Capability Using Double Rotated ESRRs

Elkorany

Ahmed

Saleeb

2018

AEM

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In this paper, CPW-Fed ultra wideband (UWB) planar monopole antenna (PMA) loaded by double elliptical split ring resonators (ESRRs) for double band-notch characteristics is introduced and examined. Two different ESRRs with different dimensions are printed in the antenna backside to notch two different frequencies. The ESRRs are also rotated and the corresponding return loss effect is examined. Different notch frequencies can be obtained by varying the ESRRs, dimensions. Two single SRRs are used to notch two frequencies instead of using dual SRR pairs. Two notch frequencies at 5.2 GHz and 6.9 GHz has been obtained to notch WLAN and C-band wireless applications, respectively. A directive radiation pattern in E-plane and omnidirectional radiation patterns in the H-plane could be observed. Also the gain is suppressed in the notch frequencies. The group delay is nearly stable in the UWB frequency range, except at the notch frequencies, which is distorted sharply. So, the proposed antenna is a good candidate for the modern UWB systems. Finite element method FEM and finite integration technique FIT are used to simulate the proposed structures through the usage of Ansys HFSS and CST MWS. Very good agreement between both results has been obtained.

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“…To avoid interference with other existing narrowband applications that inhabits part of the spectrum in the UWB band [7], such as World Wide Interoperability Microwave Access (WiMAX) in the 3. 3-3.6 GHz band, Wireless Local Area Network (WLAN) in the 5.15-5.825 GHz band, X-band satellite communication systems in the 7.25-8.4 GHz band, WiFi in the 5.47GHz-5.725 GHz band and C-band in the 3.7-4.2GHz band; a band stop filter (BSF) is integrated into the antenna but these action increases the complexity, volume and cost of the system [8].…”

Section: Introductionmentioning

confidence: 99%

Compact Tri-Band Notched Characteristics UWB Antenna for WiMAX, WLAN and X-Band Applications

Hamad

Mahmoud

2017

AEM

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Compact microstrip-fed printed monopole antenna with triple band-notched characteristics is suggested for ultra wideband (UWB) applications. The antenna is constructed of a conventional rectangular microstrip patch antenna with partial ground plane and T-shaped strip employed in the ground plane as well as an inverted Ω-and L-shaped slots incorporated within the radiated element. The notched functions are created by the inverted Ω-and L-shaped slots, which are realized for WiMAX (from 2.69 to 4.5 GHz) and WLAN (from 5.49 to 6.37 GHz). The T-shaped parasitic strip generates the third notch for the X-band uplink satellite communication (from 8.15 to 9.61 GHz). The measured operating -10 dB bandwidth of the proposed antenna extends from 2.39 to more than 18 GHz except at the notched bands. The prototype antenna has a total area of 20×20×1.6 mm 3 . The EM simulations are carried out using 3D fullwave FEM-based simulator; the Ansoft High Frequency Structure Simulator (HFSS). EM simulation results are in good agreement with measurement results. The radiation pattern of the proposed antenna is nearly Omni-directional over the whole band.

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Multi-Bandpass Filters Using Multi-Armed Open Loop Resonators with Direct Feed

Cited by 32 publications

References 8 publications

Design of microstrip bandpass and lowpass filters using coupling matrix method and a new hairpin defected ground structure

Design of microstrip bandpass and lowpass filters using coupling matrix method and a new hairpin defected ground structure

A Planar UWB Antenna with Dual Band Rejection Capability Using Double Rotated ESRRs

Compact Tri-Band Notched Characteristics UWB Antenna for WiMAX, WLAN and X-Band Applications

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