Title :
Design and development of low loss microstrip band pass filters by using YBCO- high temperature superconducting thin film
Author :
Shivhare, Jagdish
Author_Institution :
Department of ECE & EI, Institute of Technology and Management, Sector-23A, Gurgaon-122 017, India
Abstract :
To demonstrate the suitability of HTS filters we chose a four pole chebyshev band pass filter with 80 MHz band width, insertion loss of 0.5dB at 4035 MHz center frequency on LaAlO3 single crystal with YBCO HTS thin film. The filter was designed with four-pole quarter wave parallel-coupled line. To check the validity of filter design, two filters were fabricated using gold thin films of 0.5 microns thickness on 0.5mm thick LaAlO3. The filter showed an insertion loss of 8.5 dB at the pass band at room temperature and 3.5 dB at 77degK.
Keywords :
Chebyshev filters; band-pass filters; microstrip filters; superconducting thin films; Chebyshev band pass filter; HTS filters; four-pole quarter wave parallel-coupled line; frequency 4035 MHz; frequency 80 MHz; loss 0.5 dB; microstrip band pass filters; superconducting thin film; temperature 77 K; Band pass filters; Frequency; Gold; High temperature superconductors; Insertion loss; Microstrip filters; Superconducting filters; Superconducting thin films; Transistors; Yttrium barium copper oxide; Chebeshive; YBCO thin film; insertion loss; lanthanum aluminate; microstrip; semirigid; substrate;
Conference_Titel :
Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on
Conference_Location :
Jaipur
Print_ISBN :
978-1-4244-2690-4
Electronic_ISBN :
978-1-4244-2691-1
DOI :
10.1109/AMTA.2008.4762964
