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Japanese Journal of Applied Physics

Slot Antenna Coupled Thin-Film YBCO Josephson Mixers

Takashi Nozue, Akihisa Hasegawa, Yoshizumi Yasuoka Yamashita

Published Sep 1, 1996• 4 citations
Publisher

Abstract

Antenna coupled thin-film Y1Ba2Cu3O7- x Josephson mixers, consisting of a slot antenna on a fused quartz substrate and a YBCO Josephson junction on a MgO substrate, were fabricated and mixing experiments were carried out in the 50 GHz millimeter wave region. The mixing signal (IF output) obtained using the antenna coupled Josephson mixer was 12 dB greater than that obtained using the mixer without the antenna.

DOI
10.1143/jjap.35.l1181

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We present, in this work, a new thin-film antenna-coupled high-temperature superconducting (HTS) Josephson-junction terahertz (THz) mixer that demonstrates superior performance at frequencies around 0.34 THz. A novel dual-meander-slot thin-film antenna is designed to significantly improve the antenna-junction impedance matching and thus more efficient coupling of the THz signal power. Theoretical and experimental investigations are carried out to evaluate the mixer performance. This mixer can be applied to the sensitive THz wireless receivers.