SPE-14-8-058/C/WY

Page 11 of 17

6. APPLICATION NOTE

Taoglas considers the application here of the ISPC.91A antenna in different

typical environments. Some environments the antenna will be close to

ground plane (or general metal objects) and at different orientations. The

distance to ground-plane will also differ. Following this rationale, we compiled

the antenna S11 variation charts as below to evaluate the typical effects on

performance. A degraded return loss would generally to relatively decreased

efficiency, peak gain, and deformed radiation patterns. **Note - while it may

appear from the return loss on the ground above antenna that the antenna

may work in this orientation, it is likely the gain and efficiency are very poor

we would not recommend it under any circumstance**

There are three general situations of a ground plane orientation to antenna,

the setup is as below.

Ground under antenna

Ground above antenna

Ground side of antenna