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#1
June 10th 04, 06:24 PM
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How do I feed a wideband VHF yagi with a balaced DE with unbalanced coax?
The yagi is centered on 159 Mhz with a bandwidth of 6 Mhz.
The feed is 50ohm coax. The DE is a simple hertz dipole. It's electrical parameters at the resonant frequency are R 50.9 J + 10.3. What kind of balun would you use? TIA. |
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#2
June 10th 04, 11:59 PM
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You didn't mention if this would be used in some sort of transmitting
application or not. Heck, for just listening across a 6mhz spread, I'd just connect the coax and not worry about it. jw K9RZZ |
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#3
June 11th 04, 02:40 AM
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Just to be precise: it is NOT resonant!! Resonance requires that there
be a zero value for the j term. The +j10.3 indicates your antenna DE is a little long for the measured frequency. Richard wrote: The yagi is centered on 159 Mhz with a bandwidth of 6 Mhz. The feed is 50ohm coax. The DE is a simple hertz dipole. It's electrical parameters at the resonant frequency are R 50.9 J + 10.3. What kind of balun would you use? TIA. |
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