What is the type of antenna used in satellite phone?

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Salah I. Yahya

Thanks Adam

Frankly, I was thinking about Helical antenna working in the axial mode. The problem is designing a helix with a size suitable for handheld terminal makes the antenna working in the normal mode (having radiation pattern as the monopole antenna), not the axial mode !!!

Thanks again Adam

The same problem I may face with the quadrifilar antenna. But based on your reply I guess the key point is with dielectric loading. I was looking for the exact design used actually to evaluate the induced SAR in human head.

Aamir Habib

Some iridium satellite phones contain hockey puck right hand circularly polarized antennas. some terminals may also have ball antennas