Pictures tell more than thousand words. I do not remember how often I have drawn such a sketch at a customers’ office. It is time to change this waste of time and to start with an antenna proposal gallery online. Thanks again for Android smart phones, nice apps for handling pictures and Google+ to share pictures.
The GSM PIFA antenna is “flying” over ground plane. If the antenna shape is flying over ground, then the metal of a car or mashine will not much interfere with the antenna. The same antenna types are useful for dog collars, belts or watches. Such GSM PIFA antennas will radiate more in one direction than in the other. If the antenna is mounted on water and the human body or the dog is mainly water, then it makes no sense the radiate omnidirectional. An omnidirectional radio wave will just obsorbed by the water close by. The drawback is, that such antennas not available out of the shelf. Such PIFA antennas needs a customation.
If you have a need for a PIFA antenna flying over ground, then do not hesitate to drop an email to harald.naumann (at) gsm-modem.de More about in the M2M IoT Cookbook
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