AMPS/PCS/GPS active antenna for emergency call systems

被引:19
|
作者
Yegin, Korkut [1 ]
机构
[1] Yeditepe Univ, Dept Elect & Elect Engn, Istanbul, Turkey
来源
关键词
amplifiers; antenna measurements; global positioning system; mobile antennas;
D O I
10.1109/LAWP.2007.897510
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Many vehicular emergency call applications utilize a dual-band cellular phone for data exchange and Global Positioning System (GPS) antenna for localization. When the cellular phone antenna is transmitting in close proximity to the GPS antenna, the GPS low-noise amplifier (LNA) is expected to be not affected, i.e., remain linear during the operation. Most commercial GPS LNAs hardly meet this requirement, hence passive antenna-to-antenna isolation and preamplifier filtering without affecting the noise figure of the system becomes crucial. In addition, passive antenna gain requirements for emergency call applications are generally higher than those of regular dual-band cellular phone antennas. To satisfy all these requirements, a multiple-element antenna is designed, built, and measured.
引用
收藏
页码:255 / 258
页数:4
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