Analysis of pyramidal horn antennas using moment methods

Liu, K.; Balanis, C.A.; Birtcher, Craig R.; Barber, G. C.

doi:10.1109/8.247778

Cited by 64 publications

(37 citation statements)

References 16 publications

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“…The metallic horn walls are assumed infinitely thin, or equivalently the possibly significant contribution of the current flowing on the outer surface of the walls is omitted herein in order to first establish the above concept. Note, that this approximation constitutes the usual practice in horn antennas with only a few exceptions like Liu et al [5]. However, accounting for these currents in the present formulation constitutes our next priority.…”

Section: Introductionmentioning

confidence: 98%

“…This model is analyzed by employing the mode matching technique (MMT), since its numerical stability is well established. Different approaches for the analysis of the discontinuity between the horn aperture and the free space have been used, [3][4][5][6][7]. These are mainly based on the mode matching to analyze the horn interior and employed moment method to model its aperture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Dirichlet to Neumann Map Based Hybridization of a Mode Matching and Offset Moment Method for Horn Antennas Analysis

Diamantis¹,

Orfanidis²,

Chryssomallis³

et al. 2012

PIER B

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Abstract-A hybrid technique for the analysis of pyramidal and conical horn antennas is presented based on an exact vector Dirichlet to Neumann (DtN) mapping mathematical formalism. The transition from the feeding waveguide to the radiating aperture is analyzed by using the mode matching technique (MMT) employing a steppedwaveguide approach. Love's field equivalence principle is employed for the definition of equivalent electric and magnetic current densities at the horn aperture. Explicitly, these currents are located at a plane parallel to the aperture but slightly shifted inwards in order to implement an offset Moment Method for their discretization, which is free of integral singularities. The unbounded area field generated by these sources is enforced to be continuous with the internal mode matching field by strictly following DtN principles. Besides that, this procedure mimics a By-moment approach ensuring the decoupling of the required number of modes from that of the sources discretization degrees of freedom. Finally, the implemented hybrid method is validated against published experimental and numerical results for a number of pyramidal and conical horn antennas including various corrugated geometries.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A Dirichlet to Neumann Map Based Hybridization of a Mode Matching and Offset Moment Method for Horn Antennas Analysis

Diamantis¹,

Orfanidis²,

Chryssomallis³

et al. 2012

PIER B

View full text Add to dashboard Cite

show abstract

“…Both implement a standard GA exploiting elitism. The fitness function the GA has to maximize is evaluated on the numerical results attained via a proprietary [21,22] full-wave Mode Matching-based (MM) solver [28][29][30][31][32]. This optimization problem is particularly tough also because the design parameter of the problem (geometrical dimensions) are fewer than the constraints (amplitude and phase of all generated propagating modes -TE 10 , TE 30 , TE 50 and undesired TE 12 , TM 12 plus eventual other higher modes generated at the second discontinuity).…”

Section: Analysis and Optimizationmentioning

confidence: 99%

Genetic Algorithm Optimization of High-Efficiency Wide-Band Multimodal Square Horns for Discrete Lenses

Agastra¹,

Bellaveglia²,

Lucci³

et al. 2008

PIER

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336 Agastra et al.Abstract-By properly exciting higher order modes at an aperture it is possible to achieve higher aperture efficiencies. High efficiency antennas are mandatory in many applications, as discrete lenses, since the single element efficiency deeply affects the efficiency of the whole lens. In this contribution a genetic algorithm is applied to the mode matching analysis of square horns to achieve high radiation efficiency over a relatively wide band.

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“…Reflection of diffracted fields from the horn interior and double diffraction at the aperture were considered to explain the gain variation observed in a pyramidal horn antenna [28,29]. A numerical technique solving the hybrid field integral equation (HFIE) by method of moments was developed for electrically large pyramidal horn antennas [30]. Recently, several novel horn antennas of new types were designed and analyzed such as compound box-horn antenna and modified TEM horn antenna [31,32].…”

Section: Introductionmentioning

confidence: 99%

A Metamaterial-Based E-Plane Horn Antenna

Hwang¹,

Liu²,

Chin³

2009

PIER

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Abstract-In this paper, we reported an E-plane horn antenna incorporating a metamaterial. Such a metamaterial is made up of metallic cylinders organized in a two-dimensional square lattice. After properly designing the lattice constant and unit cell pattern, we synthesized a medium with the effective refractive index smaller than unity. Therefore, once the waves were excited within the metamaterial, the refractive waves tend to be perpendicular to the interface between the metamaterial and uniform medium. Based on this concept, a 4-way beam splitter was designed to equally distribute the input power into 4 different directions. We then guide each of the power into individual E-plane flared opening to radiate a directional beam pattern in each sector. We have fabricated this antenna and measured its radiation characteristics including the return loss and far-field pattern. The excellent agreement between the measured and simulated results was obtained. Due to the properties of robust, low-loss, and low-cost, this antenna may have promising application in a point-to-multiple-point downlink system.

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Analysis of pyramidal horn antennas using moment methods

Cited by 64 publications

References 16 publications

A Dirichlet to Neumann Map Based Hybridization of a Mode Matching and Offset Moment Method for Horn Antennas Analysis

A Dirichlet to Neumann Map Based Hybridization of a Mode Matching and Offset Moment Method for Horn Antennas Analysis

Genetic Algorithm Optimization of High-Efficiency Wide-Band Multimodal Square Horns for Discrete Lenses

A Metamaterial-Based E-Plane Horn Antenna

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