Title :
Superconducting narrow band pass filters for advanced multiplexers
Author :
Fathy, A. ; Kalokitis, D. ; Pendrick, V. ; Balohoubek, E. ; Pique, A. ; Mathur, M.
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
Abstract :
X-band microstrip filters with a 50-MHz-wide passband that provide 1.3-dB insertion loss at 77 K using copper ground planes have been built. Recent advances in double side coating of lanthanum aluminate substrates with YBa/sub 2/Cu/sub 3/O/sub 7- delta / will lower this figure to 0.6 dB. Circuit designs were evaluated for intermodulation distortion effects. An improvement over previous designs has increased the third-order output intercept point to +29 dBm. Methods of nondestructive dielectric and conductor loss testing were used to evaluate materials throughout the filter development.<>
Keywords :
band-pass filters; electric distortion; high-temperature superconductors; intermodulation; microstrip components; microwave filters; passive filters; superconducting microwave devices; 0.6 dB; 1.3 dB; 50 MHz; 77 K; 8 to 9 GHz; IMD; LaAlO/sub 3/ substrates; X-band; YBa/sub 2/Cu/sub 3/O/sub 7/-LaAlO/sub 3/; conductor loss testing; dielectric loss testing; intermodulation distortion effects; microstrip filters; multiplexers; narrow band pass filters; Band pass filters; Conducting materials; Copper; Dielectric losses; Insertion loss; Microstrip filters; Multiplexing; Narrowband; Passband; Superconducting filters;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.277107
