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    • 10. 发明授权
    • Multidielectric microstrip filter
    • 多电极微带滤波器
    • US5153542A
    • 1992-10-06
    • US710643
    • 1991-06-05
    • Lite D. TaiMichael W. Petersen
    • Lite D. TaiMichael W. Petersen
    • H01P1/203
    • H01P1/2039
    • A multidielectric electrical filter is adapted for passing a primary electrical signal at a first frequency while attenuating higher frequency signals, most notably harmonic spurs. The filter comprises an elongated transmission line and one or more radial pads overlying a first surface of a dielectric support opposite a ground plate. The support is formed of a first dielectric material to achieve a desired capacitive coupling between the pad and the ground plate effective to attenuate the higher frequency signals. The support further comprises a region underlying the transmission line and containing a second dielectric material having a dielectric constant distinct from the first material. Preferably, the region includes one or more slots containing air to minimize the capacitive coupling between the transmisison line and the ground plate and thereby reduce insertion loss of the primary signal that would otherwise lessen the power of the signal to the antenna.
    • 多电介质滤波器适于使第一频率的初级电信号通过,同时衰减较高频率的信号,特别是谐波杂散。 该过滤器包括细长的传输线和一个或多个径向焊盘,其覆盖与接地板相对的电介质支撑体的第一表面。 支撑件由第一电介质材料形成,以实现垫和接地板之间期望的电容耦合,有效地衰减较高频率的信号。 支撑体还包括传输线下方的区域,并且包含具有与第一材料不同的介电常数的第二电介质材料。 优选地,该区域包括一个或多个容纳空气的狭槽,以最小化透射线和接地板之间的电容耦合,从而减少主信号的插入损耗,否则会降低对天线的信号功率。