Abstract :
Object: Research how actual working conditions influence to communication ability with common and similar smart antenna. Methods: Experimental research, data comparison and the results analysis comprehensively. Test received and sent data-packets successful ratio, and its reception intensity with antenna in USB network device in Windows 98 system, under AP (infrastructure) mode with wireless broadband routers at several channels. It is greatly changing the similar smart antenna position indoors of crowd residential area, under 1 to most several BSs at the same channel. Results: The reception intensity is 70∼76%, even over 90% out of the door, the successful reception packets 14∼20%, even below 10%; sending packets below 10% even 2% between wireless router and adapter only, while signal penetrating through the much impediment walls and buildings. Uplink error is much more than omni ones. A large reflector cannot efficiently raise the performance of similar smart antenna with its own indicate software. Conclusion: It is stronger than common´s in the field and less penetrating through impediments that main-directional pattern self-fit antenna for its reception and sending. Synchronous uplink for smart one keeps unblocked communication to overcome wavefront distortion and multi-path interference. The reflector is very effectual method strong signal for common antenna, but not suitable for smart one. Uni-directional antenna concentrates energy for long distance point-to-point fixed communication and weakening signal, so that it suits and penetrates through multi impediments.
