Terahertz power enhancement by combining photocurrent from arrayed UTC-PDs using Wilkinson power combiner

We designed a novel terahertz wave power combiner which combines HF currents from each photomixer in a micro strip line. The generator is composed of four uni-travelling carrier photodiodes (UTC-PDs) as the photomixers, a 4 × 1 Wilkinson power combiner and a microstrip rectangular patch antenna on a...

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Veröffentlicht in:Japanese Journal of Applied Physics 2024-04, Vol.63 (4), p.4
Hauptverfasser: Kamiura, Yoshiki, Ssali, Hussein, Doi, Ryo, Agemori, Hiroki, Che, Ming, Mikami, Yuya, Kato, Kazutoshi
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Sprache:eng
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Zusammenfassung:We designed a novel terahertz wave power combiner which combines HF currents from each photomixer in a micro strip line. The generator is composed of four uni-travelling carrier photodiodes (UTC-PDs) as the photomixers, a 4 × 1 Wilkinson power combiner and a microstrip rectangular patch antenna on a Silicon Carbide (SiC) substrate in which photocurrents of 300 GHz from the UTC-PDs are combined to be fed to the antenna. Experimental results show that the output power is multiplied by 11 dB (approximately 13 times) compared to that of a single UTC-PD. The combined power increases super-linearly with the number of the photomixers, confirms a great advantage of photomixing as a current source.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ad37c4