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ATU effect on mono_pole radiation patterns

 
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Merro
Antenna-Theory.com Newbie


Joined: 06 Oct 2013
Posts: 2

PostPosted: Sun Oct 06, 2013 2:30 pm    Post subject: ATU effect on mono_pole radiation patterns Reply with quote

i know that every frequency has its own specific radiation pattern when applied to a mono-pole vertical with a constant length,If there is an ATU (automatic antenna tuning unit) before this fixed length mono-pole ,Does this ATU will affect this radiation patterns ,and How can i calculate or visualize this new new patterns if there is a new patterns?

Thanks for answers
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Schubert
Antenna Wizard


Joined: 08 Apr 2009
Posts: 161

PostPosted: Sun Oct 06, 2013 6:41 pm    Post subject: Reply with quote

If the tuning mechanism is in the impedance matching network (this means the tuning is accomplished via a variable capacitor or a switch that switches in another matching component), then it will have no effect on the radiation pattern.

The impedance tuner only alters the impedance mismatch loss
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Merro
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Joined: 06 Oct 2013
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PostPosted: Sun Oct 06, 2013 7:20 pm    Post subject: Reply with quote

Yes,the tuning mechanism in the impedance mismatch ,
thank you for your answer.
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