Resumen
The present invention relates to a microstrip antenna that allows multiple operating bands. It is based on the use of preferably concentric rings and rings shorted to a ground plane; it also makes use of multiple substrates, both for feeding and for the rings or spirals themselves, which allow the compaction of the antenna as a whole. Due to the resonant nature of the structure, the bandwidth of the antenna is reduced, making it ideal for narrow band applications, such as ism or mics, ie, biomedical bands of implantable technology, however, its use is not restricted to a specific application. (Machine-translation by Google Translate, not legally binding)