[Antennas] What is Max Power
WA2BPE
[email protected]
2002年7月15日 18:45:18 -0400
Uh, think there was a misstype done at the Times site - 2400 MHz, not
2.4 (nice, handy site, BTW).
Atten is 12.3 dB for the 100' run and the av. pwr is 160W. Problem
(assuming a matched load) is simply dielectric loss and how soon
meltdown occurs.
Tom - WA2BPE
Jim Reid wrote:
> > How do you determine the maximum power a coax cable
> > can handle? For example RG-214 has a dielectric breakdown
> > voltage of 2500 volts what kind of power can it handle?
>> The voltage on the line will increase dramatically as the
> VSWR increases; thus the power handling decreases
> as vswr goes higher. If the load, source, and cable
> are all 50 ohm, the answer is 6.6 kW, with about
> 0.3 dB attenuation in a 100 foot run at 2.4 GHz.
>> See this site for answers:
>> http://www.timesmicrowave.com/cgi-bin/calculate
>> Select the cable type, input a frequency and run length.
>> However, as the vswr goes up, the voltage peaks also
> rise, and power handling drops quickly. At amateur
> power levels, you should have no problems; unless
> you are to have very poor Z matches, hi.
>> 73, Jim KH7M
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