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公开(公告)号：US4730195A
公开(公告)日：1988-03-08
申请号：US750633
申请日：1985-07-01
摘要： A shortened wideband decoupled sleeve dipole antenna is disclosed in which a helically wound upper radiating element and an inductively loaded lower radiating sleeve element reduce the linear size of the antenna. Substantial decoupling is provided by a helically wound feed coaxial transmission line within the sleeve element. A matching network at the antenna feed point provides capacitive reactance above the antenna resonant frequency and inductive reactance below the antenna resonant frequency such that an impedance match between the feed coaxial transmission line is obtained at frequencies above and below the resonant frequency and dual-band performance may be obtained.
摘要翻译： 公开了一种缩短的宽带解耦套偶极天线，其中螺旋缠绕的上辐射元件和感应负载的下辐射套筒元件减小了天线的线性尺寸。 通过套管元件内的螺旋缠绕的进给同轴传输线提供了实质的去耦。 在天线馈电点处的匹配网络在天线谐振频率之上提供容性电抗，并且在天线谐振频率之下提供感抗，使得在高于和低于谐振频率和双频带性能的频率处获得馈电同轴传输线之间的阻抗匹配 可以获得。
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公开(公告)号：US4340891A
公开(公告)日：1982-07-20
申请号：US171629
申请日：1980-07-23
申请人： James P. Phillips
发明人： James P. Phillips
摘要： A communication system for receiving signals from both relatively low power level portable transmitters and relatively high power mobile transmitters wherein the receiving antenna utilizes selectively gain controlled vertically and horizontally polarized elements for enhancing signals from the portable transmitters and from longer range mobile transmitters while, at the same time, degrading signals from near field mobile transmitters.
摘要翻译： 一种用于从相对低功率水平的便携式发射机和相对较高功率的移动发射机接收信号的通信系统，其中接收天线利用选择性增益控制的垂直和水平极化元件，用于增强来自便携式发射机和较长距离移动发射机的信号，而在 同时，降低近场移动发射机的信号。
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