Propagation and radiation behaviour of corrugated feeds. Part 1: Corrugated-waveguide feed

Clarricoats, P.J.B.; Saha, Pradip Kumar

doi:10.1049/piee.1971.0211

Cited by 123 publications

(39 citation statements)

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“…The center of the mirror is 25.875 mm away from the aperture of both corrugated waveguides. [5][6][7],…”

Section: Problem Descriptionmentioning

confidence: 99%

Miter Bend Mirror Design for Corrugated Waveguides

Liao¹

2009

PIER Letters

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Abstract-Miter bend mirror has been designed for microwave transmission between two corrugated waveguides of the same size by iterative phase correction method. Geometrical Optics (GO) approximation has been used in our design at a frequency of 110 GHz. The equivalence principle is also adopted to forward-propagate and backward-propagate the beam onto the miter-bend mirror. The designed miter bend mirror shows a coupling coefficient up to 99.619%, much better than that of a flat mirror. The convergence rate shows that the design is very efficient with only a few iterations required.

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“…The center of the mirror is 25.875 mm away from the aperture of both corrugated waveguides. [5][6][7],…”

Section: Problem Descriptionmentioning

confidence: 99%

Miter Bend Mirror Design for Corrugated Waveguides

Liao¹

2009

PIER Letters

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“…The horn admittance at the i th section of the horn Y i a is obtained by applying boundary condition at the flare angle ϭ i 1 , where i is the integer and the section number of the horn [4,5]:…”

Section: Formulation Of the Cost And Fitness Functionmentioning

confidence: 99%

“…When the condition kw Ͻ 2 is satisfied, there is a TM mode in the region of the slot ( i 1 Ͻ Ͻ i 2 ), and the input slot admittance on the spherical surfaces after applying boundary condition at ϭ i 2 is [4,5]: [4,5]. The slot depth is calculated using…”

Section: Formulation Of the Cost And Fitness Functionmentioning

confidence: 99%

“…Since the horn teeth are conducting, the tangential electric field is also zero. In the balanced hybrid mode, the field inside the horn is a combination of the TE 11 and TM 11 modes known as the HE 11 mode [2][3][4]. This HE 11 mode is relatively frequency independent.…”

Section: Introductionmentioning

confidence: 99%

“…The behavior of corrugated horns has been described and the fields inside a corrugated horn have been represented by cylindrical or spherical modes [4]. Cylindrical mode analysis is the most common approach, because it is simpler than the spherical mode analysis [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Genetic algorithm optimization of a multisectional corrugated conical horn antenna

Yang

Chung

Haupt

2003

Micro & Optical Tech Letters

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periodic structure. The second (see is that there is very good agreement between the results obtained using the ADI-FDTD method and the conventional FDTD method, but the ADI-FDTD method is faster than the conventional FDTD method because the longer period of time is utilized. The last observation made from Figure 4 is that a nearly perfect reflection is achieved in the frequency range from 250 -350 MHz. CONCLUSIONIn the conventional FDTD method, the maximum time-step size is limited by minimum cell size in the computational domain. Certainly, a small time-step size will lead to a significant increase in calculation time so that the advancement time velocity will be relatively slow. In this paper, the restriction of the time-step size in the conventional FDTD method is removed by employing the ADI technique. For periodic problems such as PBG materials and spiracle cavities, the resonance phenomenon is engendered easily. Therefore, the ADI technique is an effective means for solving these kinds of abovementioned periodic problems. Compared with the conventional FDTD method, the ADI-FDTD method is found to be fast when the same accuracy is kept. As an initial work, we started with the 1D case only, but in the future it can be extended to multidimensional problems.

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