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Design and testing of a 5GHz TE10–TE30 mode converter mock-up for the lower hybrid antenna proposed for ITER

Abstract : The design and overall dimensions of a 5 GHz TE$_{10}$–TE$_{30}$ mode converter are presented. This mode converter is a RF element of a 20 MW CW lower hybrid system proposed for ITER. A low power mock-up of this device has been manufactured at CEA/IRFM and measured at low power. RF measurements indicate a return loss of 40 dB and a transmission loss of 4.78 dB ± 0.03 dB for the three outputs. The forward conversion efficiency from TE$_{10}$ mode to TE$_{30}$ has been measured from electric field probing to 99.9%. The good RF performances obtained validate the RF design of this element.
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https://hal-cea.archives-ouvertes.fr/cea-02459704
Contributor : Julien Hillairet <>
Submitted on : Wednesday, January 29, 2020 - 3:44:00 PM
Last modification on : Tuesday, May 5, 2020 - 1:39:28 PM
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Julien Hillairet, Joëlle Achard, Stéphane Rasio, Bernard Soler, Cyril Brun. Design and testing of a 5GHz TE10–TE30 mode converter mock-up for the lower hybrid antenna proposed for ITER. Fusion Engineering and Design, Elsevier, 2012, 87 (3), pp.275-280. ⟨10.1016/j.fusengdes.2012.01.007⟩. ⟨cea-02459704⟩

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