发明名称 Varactor-tuned helical resonator filter
摘要 A helical cavity resonator filter utilizes varactor tuning diodes positioned within each helical resonator coil. The diodes are positioned along the longitudinal axes of the coils so as not to interfere with the non-axial electromagnetic fields of the cavities associated with each helical resonator coil.
申请公布号 US4459571(A) 申请公布日期 1984.07.10
申请号 US19820450935 申请日期 1982.12.20
申请人 MOTOROLA, INC. 发明人 FRASER, ROBERT J.
分类号 H01P1/205;(IPC1-7):H01P1/20;H01P1/20 主分类号 H01P1/205
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