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 |
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Format: | Artikel |
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. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.35848/1347-4065/ad37c4 |