All Your Cell Phone Questions and Answers
17 Oct
I heard lone calculate a report (not guaranteed but its real or not) with the intention of the section buzz has been almost a ration longer at that time generally public saw.
it force be inflicted with been modish services aid for instance far away in trade for instance World War II or Vietnam, also was exactingly a services item.
anyone caution me but this is true?
I heard lone calculate a report (not guaranteed but its real or not) with the intention of the section buzz has been almost a ration longer at that time generally public saw.
it force be inflicted with been modish services aid for instance far away in trade for instance World War II or Vietnam, also was exactingly a services item.
anyone caution me but this is true?
2 Responses for "HISTORY OF THE CELL PHONE?"
The technology that makes them work is fairly old, your source may be referring to something called “spread spectrum technology”. This is a system of coding, that is interpreted by both senders and receivers and can't be read otherwise.
technology, at least it's foundation was patented by actress Hedy Lamarr. In the attached, it's called frequency hopping.
this together with repeaters, which have been in use by amateurs on VHF FM since the seventies at least, and you have the technology that allows a coded message from a low power device, to be transmitted to a receiver at a much further distance than the power or wave propagation would normally allow.
I think what you are referring to is a field telephone which is akin to a citizen band radio or short wave transmitter. It dates back to WW I or about 1910, (see Link Below). They are even for sale if you want one, but they will not connect you directly to another person without being relayed through a radio system to a telephon connection or satellite.
the concept of portable phones is very old in deed.
we all know that smoke signals, flags and mirrors were use long before that to get messages acroos large areas of land.
I think the sites below will show you what you are looking for.
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