Reflection resonances and natural oscillations of two-aperture iris in rectangular waveguide

Kirilenko, А. A.; Mospan, L. P.

doi:10.1109/22.859492

Cited by 49 publications

(18 citation statements)

References 4 publications

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“…So one can obtain thin narrow-band filter of full transmittance. The narrow-band transparent properties of the array of different-element particles are quite similar to the rejection properties of a two-aperture iris in a rectangular waveguide studied in [5].…”

Section: Two-element Array With Different Elementssupporting

confidence: 53%

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Resonances of Closed Modes in Thin Arrays of Complex Particles

Prosvirnin

Zouhdi

2002

Advances in Electromagnetics of Complex Media and Metamaterials

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Section: Two-element Array With Different Elementssupporting

confidence: 53%

“…Let us mention also the work [5] which is very close to this subject and which studied two-slot waveguide diaphragms.…”

Section: Eigen Modes Of Two-element Particlesmentioning

confidence: 99%

Resonances of Closed Modes in Thin Arrays of Complex Particles

Prosvirnin

Zouhdi

2002

Advances in Electromagnetics of Complex Media and Metamaterials

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“…The filter performance can further be improved by using multi-slot iris due to the formation of rejection resonance [3,4]. Recently, frequency selective surfaces (FSS) have also been used as transverse discontinuities in the design of rectangular waveguide filters resulting in much more light weight and compact waveguide filters [5,6].…”

Section: Introductionmentioning

confidence: 99%

Investigations on fractal frequency selective diaphragms in rectangular waveguide

Ghosh¹,

Sinha²,

Kartikeyan³

2010

Int J RF and Microwave Comp Aid Eng

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In this article, self-similarity and space-filling properties of fractal structures are explored as frequency selective diaphragms in rectangular waveguide, which can find applications in the design of compact, lightweight, and multiband waveguide filters with better out-of-band rejection ratio. Some self-affine fractal structures, based on Sierpinski gasket and plus shape fractals, are proposed, and the effect of scaling factor on the location of transmission bands is investigated. Self-similar structures like Hilbert curve, Koch curve, and Minkowski fractals are shown to be efficient in reducing resonant frequency of the diaphragm. Numerical results are presented along with the results obtained from HFSS, which show a good agreement. A typical application of the fractal diaphragm in the design of waveguide bandstop filter has also been demonstrated.

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“…Later on the treatment using the eigen-oscillations of open waveguide circuit was used by Kirilenko and Mospan (2) to explain the nature and the main features of such rejection phenomena. In particular it was shown that the reason of such a rejection resonance is simultaneous excitation of the low-Q and high-Q eigen-oscillations and even two different slots can provide the existence of rejection point.…”

mentioning

confidence: 99%

The Simplest Notch and Bandstop Filters Based on the Slotted Strips

Kirilenko

Mospan

2001

31st European Microwave Conference, 2001

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New configuration of the notch and bandstop filters is proposed and investigated. Here a rejection section is based on a thin slotted H-plane strip that may be considered as a limiting case of a threeThe property of a multi-slot iris to form a frequency response with a point of total reflection was initially discussed by Paterson and Anderson (1) on the basis of circuit theory considerations. Later on the treatment using the eigen-oscillations of open waveguide circuit was used by Kirilenko and Mospan (2) to explain the nature and the main features of such rejection phenomena. In particular it was shown that the reason of such a rejection resonance is simultaneous excitation of the low-Q and high-Q eigen-oscillations and even two different slots can provide the existence of rejection point. As it turned out, rectangular slot shape isn't obligatory. As example, a two-slot iris with elliptical slot apertures, discussed by C.Tomassoni et. al. What all the rejection irises (1-4) have in common is a relatively large insertion loss in the whole passband or in its essential part. It turned out that there is a limiting configuration of a three-slot iris that provides very small insertion loss out of the stopband. That is achieved practically in the whole operating range of a rectangular waveguide and up to the second resonance point located in the twoor three-mode frequency band. The geometry of such a three-slot iris is very simplest (Fig.1): it has two slots, upper and lower, extended to waveguide walls and. in fact, it is an H-plane strip with a longitudinal slot. Therefore we shall call it further the "slotted strip". In the numerical modeling of such a waveguide circuit it is considered as a combination of two plane junctions separated by a small section of three parallel waveguides. Mode-matching based key element and S-matrix technique provide an efficient solution.The calculated frequency response of a slotted strip symmetrically placed in the cross-section of the waveguide WR90 is shown in Fig. 1 by the solid curve. The slot width 1 a and height 1 b are respectively 13.7 and 1.0 (all the dimensions are in mm), the height d of metal bridges bounding

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Reflection resonances and natural oscillations of two-aperture iris in rectangular waveguide

Cited by 49 publications

References 4 publications

Resonances of Closed Modes in Thin Arrays of Complex Particles

Resonances of Closed Modes in Thin Arrays of Complex Particles

Investigations on fractal frequency selective diaphragms in rectangular waveguide

The Simplest Notch and Bandstop Filters Based on the Slotted Strips

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