发明名称 |
Dual mode multistage filter |
摘要 |
A strip dual mode filter consists of a strip line ring resonator having an electric length equivalent to a resonance wavelength lambda o for resonating microwaves at the resonance wavelength lambda o according to a characteristic impedance thereof, an input coupling capacitor for transmitting the microwaves from an input terminal to a coupling point A of the ring resonator, an output coupling capacitor for outputting the microwaves resonated in the ring resonator from a coupling point B of the ring resonator to an output terminal, and a phase-shifting circuit connected to a coupling point C and a coupling point D of the ring resonator for changing the characteristic impedance of the ring resonator by shifting a phase of the microwave by a multiple of a half-wave length of the microwaves. The coupling point B is spaced a quarter-wave length of the microwaves apart from the coupling point A, the coupling point C is spaced the half-wave length of the microwaves apart from the coupling point A, and the coupling point D is spaced the half-wave length of the microwaves apart from the coupling point B.
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申请公布号 |
US5614876(A) |
申请公布日期 |
1997.03.25 |
申请号 |
US19950534469 |
申请日期 |
1995.09.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TAKAHASHI, KAZUAKI;FUJIMURA, MUNENORI;YABUKI, HIROYUKI;MAKIMOTO, MITSUO |
分类号 |
H01P1/203;H01P7/08;(IPC1-7):H01P1/203 |
主分类号 |
H01P1/203 |
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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