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Band rejection

About: Band rejection is a(n) research topic. Over the lifetime, 854 publication(s) have been published within this topic receiving 10626 citation(s).
Papers
More filters

01 Jan 1996-
Abstract: We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard communication-grade fibers couple light from the fundamental guided mode to forward propagating cladding modes and act as spectrally selective loss elements with insertion losses act as backreflections <-80 dB, polarization-mode-dispersions <0.01 ps and polarization-dependent-losses <0.02 dB.

1,723 citations


Journal ArticleDOI
Abstract: We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard communication-grade fibers couple light from the fundamental guided mode to forward propagating cladding modes and act as spectrally selective loss elements with insertion losses act as backreflections <-80 dB, polarization-mode-dispersions <0.01 ps and polarization-dependent-losses <0.02 dB.

1,637 citations


Journal ArticleDOI
Abstract: A novel and compact ultra-wideband (UWB) microstrip-fed monopole antenna having frequency band notch function is presented. To increase the impedance bandwidth of an antenna, a narrow slit is used. By inserting a modified inverted U-slot on the proposed antenna, the frequency band notch characteristic is obtained. The designed antenna satisfies the voltage standing wave ratio requirement of less than 2.0 in the frequency band between 3 and 11 GHz while showing the band rejection performance in the frequency band of 5.0 to 5.9 GHz.

197 citations


Patent
29 Nov 1972-
Abstract: 1298387 Dielectric Waveguides WESTERN ELECTRIC Co Inc 24 April 1970 [25 April 1969] 19716/70 Heading G2J Band pass/band rejection filters are formed by coupling dielectric waveguides to dielectric disc shaped, resonant cavities. In the band rejection filter of Fig. 2A, a looped guide 81, 84 induces oppositely travelling waves in a disc 86, and the output is deficient in energy at the resonant frequency of the disc, two such discs may be used as in Fig. 2B (not shown). In the band pass filter of Fig. 3A, energy is passed from one reactive loop termination 152 of a guide 150 to a similar termination 153 of a further guide by means of an intermediate resonant disc 158, the system operating to cause non-resonant frequency waves to be reflected. In a channel dropping filter Fig. 4, (not shown), selected channels are filtered out of a wave travelling along a main guide 184 by coupling the guide to a series of discs 180-183 each being arranged to resonate at one of the desired channel frequencies.

152 citations


Journal ArticleDOI
Abstract: In this letter, a novel printed monopole antenna (PMA) for ultrawideband (UWB) applications with variable frequency band-notch characteristic is presented. The proposed antenna consists of a stepped square radiating patch with two U-shaped slots and a notched ground plane with a T-shaped sleeve that provides a wide usable fractional bandwidth of more than 140% (2.8516.73 GHz). By cutting two modified U-shaped slots with variable dimensions on the radiating patch, frequency band-stop performance is generated, and we can control its characteristics such as band-notch frequency and its bandwidth. The designed antenna has a small size of 12 times 19 mm2 while showing the band rejection performance in the frequency band of 5.02-5.97 GHz.

152 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202129
202055
201942
201844
201736
201653

Top Attributes

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Topic's top 5 most impactful authors

Nasser Ojaroudi

9 papers, 200 citations

Mohammad Ojaroudi

5 papers, 189 citations

Raaed T. Hammed

5 papers, 4 citations

M. Ojaroudi

4 papers, 32 citations

Dariush Mirshekar-Syahkal

4 papers, 1 citations