Title :
A coplanar transmission line high-T/sub c/ superconductive oscillator at 6.5 GHz on a single substrate
Author :
Klieber, Ralf ; Ramisch, Roland ; Valenzuela, Alejandro A. ; Weigel, Robert ; Russer, Peter
Author_Institution :
Lehrstuhl fuer Hochfrequenztech., Tech. Univ., Munchen, Germany
Abstract :
The design and construction of a planar, low-noise cryogenic oscillator operating at 6.5 GHz are presented. The oscillator has been built as a hybrid superconductive microwave integrated circuit (SMIC) on a single 10*10 mm LaAlO/sub 3/ substrate. Single-sided, coplanar line structures are used throughout the circuit with YBa/sub 2/Cu/sub 3/O/sub 7- delta / as conductor material. The oscillator was constructed around a GaAs MESFET as the active device. The complete oscillator is cooled by immersion in liquid nitrogen. An output power of 4.9 dBm was obtained. Single-sided noise power at 10 kHz offset from carrier was -90 dBc/Hz.<>
Keywords :
barium compounds; high-temperature superconductors; hybrid integrated circuits; microwave integrated circuits; microwave oscillators; strip line components; superconducting devices; yttrium compounds; 6.5 GHz; 77 K; GaAs; LaAlO/sub 3/ substrate; MESFET; SHF; YBa/sub 2/Cu/sub 3/O/sub 7- delta /; active device; coplanar transmission line; high-T/sub c/ superconductive oscillator; hybrid MIC; liquid nitrogen; low-noise cryogenic oscillator; microwave integrated circuit; single substrate; Conducting materials; Coplanar transmission lines; Cryogenics; Gallium arsenide; Hybrid integrated circuits; Microwave integrated circuits; Microwave oscillators; Superconducting integrated circuits; Superconducting materials; Superconductivity;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
