High-Q tunable YBCO disk resonator filters for transmitter combiners in radio base stations
Results on the development of a tunable HTS resonator structure for transmitter combiners of radio base stations are reported. The design goal was the minimization of the dissipative insertion loss of a one-pole filter with a 3-dB bandwidth of 630 kHz under the impediment of a required tunability of...
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Format: | Tagungsbericht |
Sprache: | eng |
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Zusammenfassung: | Results on the development of a tunable HTS resonator structure for transmitter combiners of radio base stations are reported. The design goal was the minimization of the dissipative insertion loss of a one-pole filter with a 3-dB bandwidth of 630 kHz under the impediment of a required tunability of the center frequency between 1.93 and 1.99 GHz and a power handling capability for 10 W transmitted power. At 70 K the quality factor of the utilized disk resonator structure turned out to be limited to 10/sup 5/ due to dielectric losses in LaAlO/sub 3/ substrate, but in a lower temperature range where dielectric losses are no longer dominating, Q/sub 0//spl ap/290000 was obtained for the tunable version. |
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ISSN: | 0149-645X 2576-7216 |
DOI: | 10.1109/MWSYM.1998.689393 |