发明名称 |
Helical resonator band pass filter with novel coupling means |
摘要 |
In a band pass filter having a plurality of helical resonators each including a quarter-wavelength winding, at least two of the helical resonators are substantially shielded from each other by a partition wall, while the corresponding two quarter-wavelength windings which are shielded from each other are electrically connected to each other through a lead line which is insulated from the shield casing, thereby improving the cut off characteristic of the filter to cut off the applied signal more rapidly in the high frequency region of the band being filtered than in the low frequency region.
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申请公布号 |
US4210884(A) |
申请公布日期 |
1980.07.01 |
申请号 |
US19780912255 |
申请日期 |
1978.06.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD |
发明人 |
TABUCHI, TOSHIHIDE;TSUMURA, MASAKATSU |
分类号 |
H01P1/205;H01P7/00;(IPC1-7):H01P7/00;H01P1/20;H01P5/00 |
主分类号 |
H01P1/205 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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