SHF-AMPLIFIER BASED ON HIGH-TEMPERATURE SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE (SQUID) Russian patent published in 2008 - IPC H01L39/22 

FIELD: cryogenic radio engineering.

SUBSTANCE: superhigh frequency amplifier based on high-temperature SQUID includes two-contact interferometer based on layer structure high-temperature superconductor (HTSC)/insulator/normal metal formed on insulating bicrystal substrate connected to input and output transmission lines, and electrical matching facilities. Transmission lines are coplanar in alignment to interferometer and designed with lengthy center electrode, mounted in HTSC layer on substrate surface, and at least one pair of outer electrodes with two gaps of central electrode. Outer electrodes are mounted on normal metal layer and function as capacitor coating for electrical matching facilities. Central electrode of input coplanar line is connected to interferometer by normal metal layer through slot line and inductive element mounted in HTSC layer. Inductive element is meander line ends of which are connected to current suppliers of Josephson contacts of quantum interferometer one-sided from bicrystal boundary. Central electrode of output coplanar line is connected to Josephson contacts of quantum interferometer another-sided from bicrystal boundary. First, second and third pairs of outer electrodes and a pair of inductive elements are lengthway as a meander line mounted on HTSC layer. Electrodes of first and second pairs and ends of meander line from each side of central electrode are sequenced. Electrodes within one pair are parallel and form output inductive-capacitive filters. Electrodes of third pair are short-circuited with conductor to form common electrode.

EFFECT: balance of vagabond electrodes of output coplanar line with signal frequency within gigahertz range and increase of amplification coefficient.

3 cl, 6 dwg