Title :
RF tunable attenuator and modulator using high Tc superconducting filter
Author :
Jian, Lu ; Yaw, Tan Chin ; Ong, C.K. ; Teck, Chew Siou
Author_Institution :
DSO Nat. Labs., Nat. Univ. of Singapore, Singapore
fDate :
1/7/1999 12:00:00 AM
Abstract :
A small path for both control current and radiofrequency (RF) current has been introduced into a high Tc superconducting filter. The interaction between the control current and RF current made the insertion loss of the filter sensitive to the amplitude of the control current. This structure has been used as an RF tunable attenuator and a modulator. 5 dB attenuation range was achieved. The maximum modulation frequency was ~3 MHz
Keywords :
high-temperature superconductors; RF tunable attenuator; control current; high Tc superconducting filter; insertion loss; modulator; radiofrequency current;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990016
