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    • 7. 发明授权
    • Radio frequency device utilizing EMI-blocking coating at connections
with external leads
    • 射频设备在与外部引线连接时使用EMI阻挡涂层
    • US4734541A
    • 1988-03-29
    • US3873
    • 1987-01-16
    • James P. Moran, Jr.
    • James P. Moran, Jr.
    • H05K9/00
    • H05K9/006
    • A radio frequency device comprising a signal processing means joined to electromagnectic transmission means, and latently susceptible, at the junction of the signal processing means and the electromagnetic transmission means, to adverse operating effects such as electromagnetic interference (EMI), and/or radio frequency leakage. At this junction is disposed a layer of a material which is blockingly effective against the adverse operating effects, and has a volumetric resistivity of from about 10.sup.-3 to about 2,000 ohm-centimeter.Also disclosed is a corresponding method of assembling a radio frequency device of such type.The invention has utility in application to devices such as impedance matching devices, impedance coupling devices, ground protection devices, radar transceivers, and signal splitters, a prefered application being to cable television junction boxes.
    • 一种射频装置,包括在信号处理装置和电磁传输装置的接合点处接合到电磁传输装置并且易受影响的信号处理装置,以及诸如电磁干扰(EMI)和/或射频 泄漏。 在该接合处设置一层材料,其阻塞有效地抵抗不利的操作效应,并且具有约10-3至约2,000欧姆厘米的体积电阻率。 还公开了组装这种类型的射频装置的相应方法。 本发明在应用于诸如阻抗匹配装置,阻抗耦合装置,接地保护装置,雷达收发器和信号分离器的装置中是有用的,优选的应用是有线电视接线盒。