Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1992-07-17
1994-06-14
Nelli, Raymond A.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333205, 333207, 3332191, 333235, H01P 120
Patent
active
053213742
ABSTRACT:
Disclosed is a TEM mode resonator having as a means for adjusting the resonance frequency a simple frequency adjusting mechanism appropriate for size reduction while permitting easy mounting of a varactor diode for varying the resonance frequency thereto. Below a strip transmission line 2 is provided a slot 7 having a length L perpendicular to the transmission line as located at an outer ground conductor surface 3 of a one-fourth wavelength type microstrip line resonator having its one end short-circuited. According as increasing the slot length L, the resonance frequency of the resonator reduces, which characteristic is utilized as a means for adjusting the resonance frequency. By connecting a varactor diode at a center portion of the slot line and varying the voltage applied to the diode, the resonance frequency can be varied.
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Matsushita Electric - Industrial Co., Ltd.
Nelli Raymond A.
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