The performance of an antenna will impact the communication range of a RF system. Since range is often a critical factor when designing RF systems, it is important to be able to characterize the antenna with network analyzer.
NSSA- Netscreen Session Analyzer. Version 1.1 Beta Pre release Written by Tim Eberhard- October 10th, 2006. A special thanks to James Quinn with Juniper Network and all the folks on the devshed forums.