Article Dans Une Revue IEEE Access Année : 2024

3-D-Printed Two-Dielectric Rectangular Waveguide TE₁₀–TE₂₀ Mode Converter

Résumé

In this work a novel TE 10 -TE 20 mode converter for rectangular waveguide (RW) is presented. The proposed structure is conceived as a device that can be inserted in an empty straight section of a RW to yield the desired mode conversion. The converter is formed by a single 'V' shaped two-dielectric compact solid that can be scaled according to the frequency of operation and to fit inside the targeted RW section. It is a very low-cost light structure easy to fabricate compared to conventional alternatives of mode converters. To demonstrate the advantages of the proposed design and show its performance, a RW TE 10 -TE 20 mode converter has been designed, simulated and measured at a center frequency of 10.7 GHz in a WR-137. It has been implemented by using additive manufacturing techniques and two materials with different dielectric permittivity. Simulated results show a mode conversion efficiency higher than 85% for a frequency bandwidth between 10.1 GHz and 11.7 GHz, and a mode purity higher than 98% for a frequency range between 9.5 GHz and 11.6 GHz. Back-to-back conversion measurements performed using WR-90 to WR-137 adapters and two of the proposed converter designs, are used to demonstrate the response of the novel TE 10 -TE 20 mode converter. Also, the measurement of the H -plane radiation pattern of a TE 20 fed WR-137 aperture is provided to corroborate the good performance of the proposed mode converter. The comparison between these measurements and electromagnetic simulations are in good agreement and show a band of operation between 10.1 GHz and 11.1 GHz.

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hal-05073199 , version 1 (19-05-2025)

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Germán Torregrosa-Penalva, Benjamin Potelon, Paula Viudes-Pérez, Héctor García-Martínez, Enrique Bronchalo, et al.. 3-D-Printed Two-Dielectric Rectangular Waveguide TE₁₀–TE₂₀ Mode Converter. IEEE Access, 2024, 12, pp.189191 - 189201. ⟨10.1109/access.2024.3516323⟩. ⟨hal-05073199⟩
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