Design and Characterization of a Ka Band 40 W RF Chain Based on GH15-10 GaN Technology for Space Solid State Power Amplifier Applications

Maati, Amel; Mouchon, G.; Belluot, James; Augoyat, P.; Dinari, Mohammad; Huet, T.; Serru, V.; Camiade, M.; Katz, A.

doi:10.23919/eumc48046.2021.9338161

Cited by 2 publications

(1 citation statement)

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“…Such limitations have greater impact as the frequency of operation increases. Additionally, their avoidance is even more justified in the context of AAs, due to the DC-to-RF efficiency of solidstate amplifiers in the Ku-band and above, which is still below 50% [18], [19].…”

Section: Introductionmentioning

confidence: 99%

Solving Sub-Wavelength Lattice Reduction in Full-Metal Front-Ends for Dual-Polarized Active Antennas

Polo‐López

Menargues²,

Capdevila³

et al. 2022

IEEE Trans. Antennas Propagat.

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This paper proposes an original structure of evanescent quad-ridge antenna to conceive dual-polarized full-metal front-ends that can be used in active antennas with wide field-ofview. An original design methodology is here proposed that allows to induce radiation from sub-wavelength squared apertures based on the use of evanescent and quad-ridge waveguides. The proposal is illustrated by means of a design with 4.5% bandwidth providing dual-circular polarization with good performance up to 50 o -scanning even in the diagonal plane. For comparison purposes, a metallic benchmark is also proposed, which is based on the use of classical quad-ridge horns. Such comparative analysis allows to understand the superior performance of the proposed concept and its main advantage: it allows to avoid the excitation of the first high order mode in the squared quadridge aperture. The excitation of such spurious mode in the antenna is explained in terms of simple equivalent circuit models characterizing the aperture periodic discontinuity.

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Section: Introductionmentioning

confidence: 99%