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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yagi, H. Yoshio, E. Shimura, T. |
| Copyright Year | 2003 |
| Description | Author affiliation: NTT DoCoMo, Inc, Kanagawa, Japan (Yagi, H.; Yoshio, E.) |
| Abstract | IMT-2000 is the dominant 3rd generation cellular system that uses the 2 GHz band. In Japan, its base station antennas must be integrated into those of the conventional PDC (personal digital cellular system using 0.9/1.5 GHz) because antenna construction space is extremely tight. When using IMT-2000, we want to use simple base-station equipment and omni-directional antennas. Accordingly, we plan to use dual-band (0.9/2.0 GHz) omni-directional base station antennas in rural areas. Dipole or monopole antennas are generally used as omni-directional antennas. However, the feed lines, needed to control electrical down tilting in the vertical plane, influence the horizontal pattern, making it very difficult to get a good omni-directional pattern. To improve the pattern, two dipole antennas can be arranged on opposite sides of a square type reflector which covers the feed lines. However, in a dual-band antenna, twice as many feed lines are needed, so that the cylindrical reflector becomes too big or the feed lines do not lie underneath the reflector; and it is difficult to achieve slender antennas. We propose a slender type base station antenna whose radiation pattern in the horizontal plane is omni-directional in both the 0.9 GHz and 2.0 GHz bands. This antenna eliminates the antenna construction space problem. |
| Sponsorship | Inst. of Elec. Eng., Japan IEEE |
| Starting Page | 20 |
| Ending Page | 22 |
| File Size | 124838 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780381963 |
| DOI | 10.1109/WCT.2003.1321425 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-10-15 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Antenna measurements Base stations Dipole antennas Yagi-Uda antennas Dual band Mobile antennas Directive antennas Antenna feeds Reflector antennas Antenna radiation patterns |
| Content Type | Text |
| Resource Type | Article |
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