Slit coupled E-plane rectangular T-junctions using single port mode matching technique

Abdelmonem, A.; Yao, Hui-Wen; Zaki, K.A.

doi:10.1109/22.293548

Cited by 15 publications

(9 citation statements)

References 5 publications

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“…A novel feature of the network for the tee junction is that theoretical expressions have been derived for all of the elements of the network, which are in simple closed form and yet are accurate so that numerical values for the antenna performance can be calculated quickly and inexpensively. An independent verification of the accuracy of these tee junction expressions has been provided in a recent paper [8]. Section III presents the details of the transverse equivalent network and derives the dispersion relation for the propagation characteristics from the transverse equivalent network.…”

mentioning

confidence: 99%

A versatile leaky-wave antenna based on stub-loaded rectangular waveguide .I. Theory

Lampariello

Frezza

Shigesawa

et al. 1998

IEEE Trans. Antennas Propagat.

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A new leaky-wave antenna is presented here that possesses many desirable features and is suitable for application to both the millimeter-wave and microwave ranges. These desirable features, some of which are unusual, include a simple configuration, a wide flexibility in the range of available beamwidths, the ability to control the beamwidth and the direction of the beam essentially independently, and negligible cross polarization at all scan angles. The antenna structure consists of a parallel-plate stub guide of small height, less than a half wavelength, located off center on the top of rectangular waveguide. The beamwidth is easily controlled from very wide to very narrow by adjusting the stub width or location. Part I presents the principle of operation and the theory, employing a new transverse equivalent network that is accurate, but also simple, so that it permits rapid and inexpensive numerical calculations. Part II describes and derives the modifications required in the theory to account for flanges and/or finite stub length, and Part III is devoted to measurements at X-band and from 40 to 60 GHz on both the propagation properties and the radiation patterns; excellent agreement with the theory is demonstrated. Index Terms-Leaky-wave antennas. I. INTRODUCTION A leaky-wave line-source antenna is basically an open waveguide possessing a mechanism that permits a slow leakage of power along the length of the waveguide. This length then constitutes the radiating aperture of the line source and the radiation occurs in the form of a conical fan beam that is narrow in the plane of scan. When the aperture is horizontal and faces upward, the radiated beam is customarily scanned in elevation by varying the frequency. Most of the early leaky-wave antennas were based on closed rectangular waveguide where leakage was produced by introducing a physical cut in the waveguide top or side wall in the Manuscript

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confidence: 99%

A versatile leaky-wave antenna based on stub-loaded rectangular waveguide .I. Theory

Lampariello

Frezza

Shigesawa

et al. 1998

IEEE Trans. Antennas Propagat.

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“…В настоящее время разнообразные Е-и Н-плоскостные сочленения волноводных трактов находят широкое применение в антенно-волноводной технике сверхвысокочастотного (СВЧ) и крайне высокочастотного (КВЧ) диапазонов радиоволн [1][2][3][4][5][6]. Для изменения электродинамических характеристик сочленений используются как индуктивные и емкостные диафрагмы (в основном с целью улучшения согласования в магистральном волноводе) [7,8], так и резонансные металлические стержни (монополи), не перегораживающие полностью поперечное сечение волновода [8,9]. Однако в перечисленных и других публикациях по этой тематике монополи предполагаются идеально проводящими и расположенными симметрично относительно стенок волноводов в области связи.…”

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E-plane rectangular waveguides junction with vibrator-slot coupling between shoulders

Berdnik¹,

Katrich²,

Nesterenko³

et al. 2015

RADIOFIZ. ELEKTRON.

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Исследование и оптимизация электродинамических характеристик сочленений прямоугольных волноводов, широко используемых в антенно-волноводных устройствах, являются важными для практических приложений. На основании приближенного аналитического решения системы уравнений для токов обобщенным методом наведенных электромагнитодвижущих сил построена математическая модель для дифракционных полей Е-плоскостного Т-образного сочленения прямоугольных волноводов, имеющих вибраторно-щелевую структуру связи. Особенностью модели является одновременный учет переменного вдоль оси монополя поверхностного импеданса и постоянного импеданса, распределенного на торце внешнего полубесконечного волновода. Проведены многопараметрические исследования энергетических характеристик Т-сочленения в диапазоне одномодового режима работы волноводов. Показана возможность эффективного использования импедансного монополя в качестве управляющего элемента деления мощности в заданных пропорциях между выходными плечами сочленения. Ил. 8. Библиогр.: 18 назв. Ключевые слова: волноводное сочленение, импедансный вибратор, резонансная щель, импедансное покрытие.

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“…Junction matching is usually carried out by inductive or capacitive diaphragms [6,7], and resonant metal rods [7,8] in the straight waveguide. The rods are preferable, since they do not block the waveguide cross-section.…”

Section: Introductionmentioning

confidence: 99%

Waveguide T-junctions with resonant coupling between sections of different dimensions

Berdnik

Katrich

Nesterenko

et al. 2016

Int. J. Microw. Wireless Technol.

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and yuriy m. penkin Electromagnetic characteristics of the E-plane T-junction for two rectangular waveguides using resonant coupling between the waveguide sections were studied by mathematical modeling. The problem of coupling between infinite and semi-infinite rectangular waveguides through a resonant slot in the end-wall of the semi-infinite waveguide in the presence of resonant monopole is solved in a strict electrodynamic formulation. The monopole with variable surface impedance is placed parallel to the narrow walls at an arbitrary position inside the infinite waveguide. The problem is solved analytically by the generalized method of induced electro-magneto-motive forces. Impedance vibrator inclusions with variable electro-physical parameters have been analyzed as control elements for waveguide junctions. To this purpose energy characteristics of the junction in the single-mode regime of the both waveguides, and also in multi-mode regime of the semi-infinite waveguide is investigated. The results may be useful for development of variety antennas and waveguide devices, which involves waveguide junctions.

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Slit coupled E-plane rectangular T-junctions using single port mode matching technique

Cited by 15 publications

References 5 publications

A versatile leaky-wave antenna based on stub-loaded rectangular waveguide .I. Theory

A versatile leaky-wave antenna based on stub-loaded rectangular waveguide .I. Theory

E-plane rectangular waveguides junction with vibrator-slot coupling between shoulders

Waveguide T-junctions with resonant coupling between sections of different dimensions

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