Design of a Low-Loss Bandpass Filter Using Dielectric Rod Resonators Loaded in a High-Tc Superconductor Cylinder
Summary :
A Chebyshev type bandpass filter using four TM01δ-mode dielectric rod resonators oriented axially in a high-Tc superconductor cylinder is designed with 3 dB bandwidth 36 MHz at 11.958 GHz. The single resonator which contains a Ba (MgTa) O3 ceramic rod of εγ=24 and a YBa2Cu3Oy bulk cylinder is designed to realize temperature coefficient of f0, τf=0 ppm/K at 20 K. The unloaded Q, Qu measured at 20 K is 150,000 which is higher than Qu=100,000 for a TM01δ-mode resonator with a copper cylinder. When the constructed filter is cooled from room temperature to below 50 K, the center frequency shifted only 5 MHz which corresponds to τf=1.5 ppm/K and the insertion loss IL0 at the center freqency reduced from 3.0 dB to about 0 dB, the designed value of which is 0.04 dB, which is too small to be measured accurately.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E75-C No.8 pp.900-905
- Publication Date
- 1992/08/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Cryogenic Microwave Devices)
- Category
- Passive Devices
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Yoshinori KOGAMI, Yoshio KOBAYASHI, "Design of a Low-Loss Bandpass Filter Using Dielectric Rod Resonators Loaded in a High-Tc Superconductor Cylinder" in IEICE TRANSACTIONS on Electronics,
vol. E75-C, no. 8, pp. 900-905, August 1992, doi: .
Abstract: A Chebyshev type bandpass filter using four TM01δ-mode dielectric rod resonators oriented axially in a high-Tc superconductor cylinder is designed with 3 dB bandwidth 36 MHz at 11.958 GHz. The single resonator which contains a Ba (MgTa) O3 ceramic rod of εγ=24 and a YBa2Cu3Oy bulk cylinder is designed to realize temperature coefficient of f0, τf=0 ppm/K at 20 K. The unloaded Q, Qu measured at 20 K is 150,000 which is higher than Qu=100,000 for a TM01δ-mode resonator with a copper cylinder. When the constructed filter is cooled from room temperature to below 50 K, the center frequency shifted only 5 MHz which corresponds to τf=1.5 ppm/K and the insertion loss IL0 at the center freqency reduced from 3.0 dB to about 0 dB, the designed value of which is 0.04 dB, which is too small to be measured accurately.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e75-c_8_900/_p
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@ARTICLE{e75-c_8_900,
author={Yoshinori KOGAMI, Yoshio KOBAYASHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of a Low-Loss Bandpass Filter Using Dielectric Rod Resonators Loaded in a High-Tc Superconductor Cylinder},
year={1992},
volume={E75-C},
number={8},
pages={900-905},
abstract={A Chebyshev type bandpass filter using four TM01δ-mode dielectric rod resonators oriented axially in a high-Tc superconductor cylinder is designed with 3 dB bandwidth 36 MHz at 11.958 GHz. The single resonator which contains a Ba (MgTa) O3 ceramic rod of εγ=24 and a YBa2Cu3Oy bulk cylinder is designed to realize temperature coefficient of f0, τf=0 ppm/K at 20 K. The unloaded Q, Qu measured at 20 K is 150,000 which is higher than Qu=100,000 for a TM01δ-mode resonator with a copper cylinder. When the constructed filter is cooled from room temperature to below 50 K, the center frequency shifted only 5 MHz which corresponds to τf=1.5 ppm/K and the insertion loss IL0 at the center freqency reduced from 3.0 dB to about 0 dB, the designed value of which is 0.04 dB, which is too small to be measured accurately.},
keywords={},
doi={},
ISSN={},
month={August},}
Copy
TY - JOUR
TI - Design of a Low-Loss Bandpass Filter Using Dielectric Rod Resonators Loaded in a High-Tc Superconductor Cylinder
T2 - IEICE TRANSACTIONS on Electronics
SP - 900
EP - 905
AU - Yoshinori KOGAMI
AU - Yoshio KOBAYASHI
PY - 1992
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E75-C
IS - 8
JA - IEICE TRANSACTIONS on Electronics
Y1 - August 1992
AB - A Chebyshev type bandpass filter using four TM01δ-mode dielectric rod resonators oriented axially in a high-Tc superconductor cylinder is designed with 3 dB bandwidth 36 MHz at 11.958 GHz. The single resonator which contains a Ba (MgTa) O3 ceramic rod of εγ=24 and a YBa2Cu3Oy bulk cylinder is designed to realize temperature coefficient of f0, τf=0 ppm/K at 20 K. The unloaded Q, Qu measured at 20 K is 150,000 which is higher than Qu=100,000 for a TM01δ-mode resonator with a copper cylinder. When the constructed filter is cooled from room temperature to below 50 K, the center frequency shifted only 5 MHz which corresponds to τf=1.5 ppm/K and the insertion loss IL0 at the center freqency reduced from 3.0 dB to about 0 dB, the designed value of which is 0.04 dB, which is too small to be measured accurately.
ER -
English
