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#1
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On Jul 1, 7:24 am, wrote in
http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. http://en.wikipedia.org/wiki/Super_high_frequency I choose SHF frequencies because SHF seems to be the sweet spot between frequencies that are high-enough to rip through charged particles & provide large amounts of bandwidth, yet low-enough to be wireless and long-distance. At EHF and above, it starts to get into the IR range where long-distance wireless reception is not possible and atmospheric opacity begins to dominate. Equally important, SHF frequencies can efficiently transmit signals using extremely small transmitters. Longer wavelengths require larger transmitters. Obviously there are frequencies lower than SHF -- VHF and above -- that can easily penetrate charged particles [e.g. anything resembling the ionosphere or heliosphere]. However, lower-frequencies tend to result in less bandwidth, so it is better to use higher-frequencies when the application requires significant bandwidth. I choose AM because it requires less bandwidth than FM. In addition, AM tends to retain reception of rather weak signals, while FM "considers" such signals to be absent. |
#2
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In rec.radio.amateur.antenna Radium wrote:
On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. Cell phones already use frequencies in the 3 GHz region. You are an idiot. snip crap -- Jim Pennino Remove .spam.sux to reply. |
#3
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![]() wrote in message ... Cell phones already use frequencies in the 3 GHz region. Really? Which ones? I'm only aware of cell systems using 800, 900, 1800 and 1900 MHz. There are some (very few) multisystem phones that use all four of those ranges. |
#4
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On Jul 15, 1:56 pm, "Brenda Ann" wrote:
wrote in message ... Cell phones already use frequencies in the 3 GHz region. Really? Which ones? I'm only aware of cell systems using 800, 900, 1800 and 1900 MHz. There are some (very few) multisystem phones that use all four of those ranges. .. . . |
#5
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In rec.radio.amateur.antenna Brenda Ann wrote:
wrote in message ... Cell phones already use frequencies in the 3 GHz region. Really? Which ones? I'm only aware of cell systems using 800, 900, 1800 and 1900 MHz. There are some (very few) multisystem phones that use all four of those ranges. Notice the word "region"? -- Jim Pennino Remove .spam.sux to reply. |
#6
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On Jul 15, 1:45 pm, wrote:
In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...sg/696d6abf90c... : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. Cell phones already use frequencies in the 3 GHz region. You are an idiot. snip crap -- Jim Pennino Remove .spam.sux to reply. .. . . |
#7
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Thank you Jim. You did good, it will come around full circle, allways does!
Butch KF5DE wrote in message ... In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. Cell phones already use frequencies in the 3 GHz region. You are an idiot. snip crap -- Jim Pennino Remove .spam.sux to reply. |
#8
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On Sun, 15 Jul 2007 20:45:02 GMT, wrote in
: In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. True. Cell phones already use frequencies in the 3 GHz region. False. -- Best regards, FAQ FOR CINGULAR WIRELESS: John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ |
#9
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In rec.radio.amateur.antenna John Navas wrote:
On Sun, 15 Jul 2007 20:45:02 GMT, wrote in : In rec.radio.amateur.antenna Radium wrote: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...0c8ed13?hl=en& : how would u like to change the cell phone industry? Analog cells phones should stop using FM and should start using AM with SHF frequencies - at least 3 GHz and at most 30 GHz. Analog cell phones are going away. True. Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. ..8 GHz is not in the -region- of 3 GHz. -- Jim Pennino Remove .spam.sux to reply. |
#10
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On Wed, 18 Jul 2007 00:05:01 GMT, wrote in
: In rec.radio.amateur.antenna John Navas wrote: On Sun, 15 Jul 2007 20:45:02 GMT, wrote in Cell phones already use frequencies in the 3 GHz region. False. 1.9 GHz is in the -region- of 3 GHz. False. -- Best regards, FAQ FOR CINGULAR WIRELESS: John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ |
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