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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 12, December 2000

Table of Contents for this issue

Complete paper in PDF format

Superconducting Filter for IMT-2000 Band

Genichi Tsuzuki, Member, IEEE Masanobu Suzuki and Nobuyoshi Sakakibara

Page 2519.

Abstract:

In this paper, a new design of microstrip-line superconducting filters for IMT-2000 band application is presented. The design features high selectivity by means of creating transmission zeros and using many resonators. As a demonstration, a 16-and 32-pole filter were fabricated using YBCO films on a half-area and on the full area of 3-in-diameter MgO wafers, respectively. Excellent attenuation of more than 30 dB, 420 kHz from the lower band edge,and 400 kHz from the upper band edge for the 32-pole filter was achieved. The filters were tuned not with mechanical tuning screws, but with a dielectric film. The tuning was carried out based on a novel method of measurement. These techniques are also described.

References

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