3 ms·
Transmit power has nothing to do with antenna length. In fact if you change the antenna length you change the resonating frequency of the antenna. Satellites ar
by vitaflo 5y ago
Transmit power has nothing to do with antenna length. In fact if you change the antenna length you change the resonating frequency of the antenna. Satellites are also line of sight and most sat antennas radiate straight up instead of multi-directional like cell antennas.
In any case iridium devices usually output max 2w. Same as 4G.
- jsjohnst 5y ago> In any case iridium devices usually output max 2w. Not according to Iridium’s data sheets I just read and provided values in my post > Same as 4G Nope, back in AMPS days power could be up to 2W, but 4G UEs are almost always limited to a maximum of 23dBm (aka 200mW). > Transmit power has nothing to do with antenna length. Correct if you are purely talking about antenna design from a generic pov. In the case of a phone, it does matter because you can’t transmit 10W into an omnidirectional antenna pressed up against someone’s ear due to current regulations, so it necessitates moving the antenna further away (hence one reason sat phones have a “whip antenna”, but there are other reasons too). This effectively makes the antenna “larger”.