Compact and Highly Efficient Single and Dual Polarized Aperture Antennas with Integrated Multiport Overmoded Excitation

Stoumpos, Charalampos; Fraysse, Jean-Philippe; Goussetis, George; Sauleau, Ronan; Gonzalez, Cebrian Garcia; Legay, Hervé

doi:10.23919/eucap51087.2021.9411363

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…This fact signifies that the proposed method could be potentially applied to radiating elements for dual-band applications. Extensibility lies also on dual-polarized design cases [20]; once the four-port square aperture radiating element is optimized, the most challenging subject relates to the excitation network, namely the fourway dual-polarized (orthomode) power divider [21], [22].…”

Section: Discussionmentioning

confidence: 99%

Highly Efficient Broadband Pyramidal Horn Antenna With Integrated H-Plane Power Division

Stoumpos

Fraysse

Goussetis

et al. 2022

IEEE Trans. Antennas Propagat.

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The concept and development of a highly efficient pyramidal horn is described. The radiating element comprises a rectangular radiating aperture fed by two smaller flared square waveguide sections via a bifurcated H-plane surface discontinuity. For the simultaneous feeding of the 2-port radiating element, the total antenna includes a compact H-plane power divider. Properly weighted TEn0 modes (n∈N * ) are excited at the output of the two flared waveguide sections. The bifurcation is responsible for the recombination of the incoming fields. The lowdispersive modal coupling coefficients (or transmission coefficients of the bifurcation's generalized scattering matrix) between the excitation and the aperture modes enable the broadband realization of the targeted aperture modal content. The common waveguide section is responsible for the phase alignment of the aperture modes. The design method targets a pre-optimized model which approximates the amplitude of the aperture modes TEm0 (m = 1, 3, 5, …) in the order of 1/m and minimises their relative phase difference. Finally, maximum aperture efficiency can be achieved by fine tuning and with low computational complexity. Design principles are given and illustrated by means of an example involving an antenna with aperture size of about 2.8λ0×1.4λ0 (λ0 being the free-space wavelength at the central frequency of operation). The antenna exhibits aperture efficiency levels above 95% over the entire Ku-Tx band (10.7 -12.75 GHz), as well as a compact profile (4.1λ0). The measured results of a prototype manufactured through milling verify experimentally the numerically predicted performance.

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Section: Discussionmentioning

confidence: 99%

Highly Efficient Broadband Pyramidal Horn Antenna With Integrated H-Plane Power Division

Stoumpos

Fraysse

Goussetis

et al. 2022

IEEE Trans. Antennas Propagat.

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“…The first one refers to the fact that the common waveguide modes TE 10 and TE 70 couple in the same way to the three excitation waveguide modes TE 10 , TE 20 , and TE 30 . The next two comments regard the impact of the third excitation mode that has been considered in contrast to the previous moderate aperture size cases [9][10][11]; the TE 30 mode (|h in 30 | • e −j∆φ in 30 ). The interaction of this mode with the common waveguide mode F h 30…”

Section: Design Principlesmentioning

confidence: 99%

“…The concept of utilizing more than one multimode waveguide access to feed the radiating aperture of a horn was recently developed [8,9]. Highly efficient, compact, and broadband horns were designed and manufactured in single [10] and dual polarizations [11], redefining the state-of-the-art.…”

Section: Introductionmentioning

confidence: 99%

Generalized Design Methodology of Highly Efficient Quad-Furcated Profiled Horns With Larger Apertures

Stoumpos¹,

Fraysse²,

Goussetis³

et al. 2022

PIER M

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In this work we demonstrate the extended and generalized methodology for the design of Quad-Furcated Profiled Horns (Q-FPHs). Based on a design case of a 4λ 0 × 4λ 0 Q-FPH, we extract the Generalized Scattering Matrix (GSM) of the enlarged quad-furcated discontinuity and provide analytical expressions for its multimode feeding. Next, the four feeding and the upper common waveguide sections are optimized accordingly through Mode-Matching (MM). The high aperture efficiency levels delivered by the methodology are verified by full-wave simulations of the optimized design case and compared to the state-of-the-art which is thereby redefined.

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Quad-Furcated Profiled Horn: The Next Generation Highly Efficient GEO Antenna in Additive Manufacturing

Stoumpos

Fraysse

Goussetis

et al. 2022

IEEE Open J. Antennas Propag.

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A novel compact and highly efficient dual-polarized horn-like antenna is presented. It exploits a radiating aperture that is fed by four smaller waveguides via a quad-furcated junction. The antenna also comprises the full feed network for the feed waveguides including an integrated 4-way orthomode power divider. Design principles are described in detail and illustrated by means of an example involving an antenna with aperture size of 2.6λ0×2.6λ0 (λ0 the wavelength at the central frequency of operation) intended primarily for Geostationary Orbit (GEO) satellites. The antenna feed was designed to comply with the Additive Manufacturing rules and exhibits aperture efficiency levels close to the theoretical maximum ones over the entire transmit Ku band (10.7 -12.75 GHz), while at the same time its profile is highly compact (6.4λ0). The measured results of a prototype 3D-printed in Selective Laser Melting (SLM) verified experimentally the calculated high aperture efficiency (over 90%). The total antenna feed attains return loss > 19 dB and maximum cross-polarization isolation (XPI) > 24 dB over a bandwidth of 18%. In light of the favorable electrical performances and compact size, the proposed solution constitutes an appealing alternative to profiled (or spline) horns for satellite antenna systems used either as reflector feeds or direct radiating arrays.

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Compact and Highly Efficient Single and Dual Polarized Aperture Antennas with Integrated Multiport Overmoded Excitation

Cited by 3 publications

References 11 publications

Highly Efficient Broadband Pyramidal Horn Antenna With Integrated H-Plane Power Division

Highly Efficient Broadband Pyramidal Horn Antenna With Integrated H-Plane Power Division

Generalized Design Methodology of Highly Efficient Quad-Furcated Profiled Horns With Larger Apertures

Quad-Furcated Profiled Horn: The Next Generation Highly Efficient GEO Antenna in Additive Manufacturing

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