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faq:freedom-from-feedback [2015/04/21 16:26] – [Freedom from Feedback] hessfaq:freedom-from-feedback [2015/10/14 11:06] (current) – [GSM-R] fachet
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 As a theoretical rule of thumb, a good decoupling requires a distance of 5 to 10 λ.(([λ] Lambda = Wave length = v/f with v∼3×10<sup>8</sup> m/s.))\\ As a theoretical rule of thumb, a good decoupling requires a distance of 5 to 10 λ.(([λ] Lambda = Wave length = v/f with v∼3×10<sup>8</sup> m/s.))\\
 However, in practive often a distance of 3 λ is sufficient. \\ However, in practive often a distance of 3 λ is sufficient. \\
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 At 2.1 GHz (e.g. UMTS) the formula returns 300'000'000/2'100'000'000 = 300/2100 = 0.14m. At 2.1 GHz (e.g. UMTS) the formula returns 300'000'000/2'100'000'000 = 300/2100 = 0.14m.
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 For GSM-R Deutsche Bahn requires a decoupling of up to -60 dBm. According to a simulation of one of our antenna supplier a distance of 350 cm is sufficant to fulfill this requirements For GSM-R Deutsche Bahn requires a decoupling of up to -60 dBm. According to a simulation of one of our antenna supplier a distance of 350 cm is sufficant to fulfill this requirements
  
-Source: {{:faq:entkopplung_gsm-r_-_v02.pdf|}}+Source: {{{{:faq:simulation_report_decoupling_gsm-r_v06.pdf|}} 
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 +Quelle: {{:faq:simulation_report_entkopplung_gsm-r_v06.pdf|}}

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faq/freedom-from-feedback.1429633560.txt.gz · Last modified: 2015/04/21 16:26 by hess