Design and Implementation of an RF Coupler Based on YBCO Superconducting Films

• Published in: IEEE transactions on applied superconductivity Vol. 25; no. 2; pp. 1 - 5
• Main Authors: Holdengreber, Eldad, Mizrahi, Moshe, Glassner, Elichai, Dahan, Yakir, Castro, Hector, Farber, Eli
• Format: Journal Article
• Language: English
• Published: IEEE 01-04-2015
• Subjects: communication systems; Copper; Couplers; Couplings; high power transmission; HTSC; microwave; Scattering; Strips; Temperature measurement; VHF Band; YBCO; Yttrium barium copper oxide; high-power transmission; high-temperature superconductor (HTSC); Communication systems; very high frequency (VHF) band; YBCO; microwave
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2014.2379720

A radio-frequency coupler was designed and implemented using high-temperature superconductor (HTSC) YBCO films. A circuit for a single superconducting coupling channel was implemented and serves as the primary component in the multichannel coupling system geometry, allowing a high-power broadcast due to low losses of superconductors below the critical temperature (T c ). In this paper, a solution for the multiple antennas' isolation problem is proposed by reducing the number of antennas to a single antenna. Multichannel transmission systems require high-power broadcasts in order to transmit signals over long distances. A coupling system with low losses was used to improve the system's active performance. In this paper, the system is implemented in a very high-frequency range using a microstrip in meander geometry.