Design of a novel ultra‐wide stopband lowpass filter using H‐defected ground structure

Boutejdar, A.; Elsherbini, A.; Omar, A.S.

doi:10.1002/mop.23189

Cited by 16 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the future, such design approach can find its applications in mobile communication systems. teristics of easy integration with system circuits, miniaturization, and bandwidth enhancement by using different kinds of monopole shapes, e.g., F-shape [4], G-shape [5], L-I-shape [1,6], T-shape [7], and U-shape [8]. However, it is still difficult for general monopole antennas to generate wide multiband performance while containing specified frequency bands with a compact size.…”

Section: Resultsmentioning

confidence: 99%

Small‐sized quasi‐elliptic parallel coupled band pass filter using microstrip discontinuity corrections and multilayer‐technique

Boutejdar

Burte

Omar

2011

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this article, we present a new technique to obtain a sharp symmetric response with lower losses for microstrip coupled‐line bandpass filters using the discontinuities correction method.The technique is verified by measurements and simulations. Simulated and measured results of the proposed filters are presented and show good agreements. Additionally, based on this work it will be shown that a new idea with the help of U‐resonators and multilayer‐technique may be used in the future to reduce more the size and to suppress the second harmonic in reject band of the structure. We think that the filter structure can be applied to improve the stopband and passband performances of other microwave circuits as well as other types of filters. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2433–2438, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26262

show abstract

Section: Resultsmentioning

confidence: 99%

Small‐sized quasi‐elliptic parallel coupled band pass filter using microstrip discontinuity corrections and multilayer‐technique

Boutejdar

Burte

Omar

2011

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…The first section introduces several methods to suppress harmonics and DGS is adopted in filter II. Non-uniform H-shaped DGS forms [7], using S-shaped gap replacing the general gap to reduce the frequency [8], are defected at the input/output feeding lines to induct Figure 8. Schematic of the proposed second tunable dual-band BPF with harmonic suppression.…”

Section: Filter Ii: Tunable Dual-band Bpf With Harmonic Suppressionmentioning

confidence: 99%

Dual-Band Bandpass Filter With Independently Tunable Passbands and Wide Stopband

Guo¹,

Feng²,

Lin³

et al. 2014

PIER Letters

View full text Add to dashboard Cite

Abstract-This paper presents a dual-mode stub loaded ring resonator (SLRR) to design a tunable dual-band bandpass filter (BPF) with two independently controllable passbands. The proposed resonator principally comprises a stepped-impedance ring resonator (SIRR) loaded with three stubs and two varactor diodes. Two independently tunable passbands are implemented by employing two varactors to control the dominant even-mode resonant frequency and odd-mode resonant frequency, respectively. Moreover, a new stub loaded double-ring resonator (SLDRR) is proposed to design the second tunable dual-band filter by shorting two stubs of the SLRR. With the same tuning method, the second filter can achieve two independently controllable passbands. In order to suppress the harmonics, defected ground structures (DGSs) are introduced at input and output feeding lines without degrading the passbands characteristics. The measured results are in good agreement with the simulated ones.

show abstract

“…On the other hand for the conventional filter, the stopband width with 20 dB attenuation reaches only 4.5 GHz. Moreover, the proposed filter is 50% smaller than the conventional end-coupled filter [7][8][9]. The new DGS-bandpass filter [10][11][12] was fabricated and its measuredand simulated results are shown in Figures 14 and 15.…”

Section: Compact End-coupled Bpf Using Dgs-slotsmentioning

confidence: 99%

A novel compact J‐admittance inverter‐coupled microstrip bandpass filter using arrowhead‐shape as defected ground structure

Boutejdar

Amari

Omar

2009

Micro & Optical Tech Letters

View full text Add to dashboard Cite

This letter reports a new design of compact end‐coupled microstrip bandpass filter with two arrowhead slots as defected ground structure (DGS) in the ground plane [Boutejdar etal., IEEE AP‐SSymp (2005); Ahn, IEEE Trans Microwave Theory Tech 27 (1979), 44–50; Won etal., IEEE Trans Microwave Theory Tech 49 (2001), 86–93]. These slots replaced two λ/2‐microstrip resonators. Both feeds are indirectly coupled with the resonator on top layer by means of a J12 ‐admittance inverter (gap g). This method gives an advantage of size reduction over the conventional design by more than 50%, this structure allows for a convenient method to control the center‐frequency and high suppression of harmonics. From 6 to 14 GHz, the investigated DGS‐BPF has a rejection level better than 20 dB. According to design and measurement results, a good agreement between simulated and measured results is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 34–38, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24817

show abstract

Design of a novel ultra‐wide stopband lowpass filter using H‐defected ground structure

Cited by 16 publications

References 6 publications

Small‐sized quasi‐elliptic parallel coupled band pass filter using microstrip discontinuity corrections and multilayer‐technique

Small‐sized quasi‐elliptic parallel coupled band pass filter using microstrip discontinuity corrections and multilayer‐technique

Dual-Band Bandpass Filter With Independently Tunable Passbands and Wide Stopband

A novel compact J‐admittance inverter‐coupled microstrip bandpass filter using arrowhead‐shape as defected ground structure

Contact Info

Product

Resources

About