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Need help with designing a 300-400MHz antenna

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Mrchow

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300-400 antenna

Does anyone have the experience to design an antenna in the band 300 - 400MHz? It's a 100MHz BW antennna.
 

lkuzu

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more specs required

what type of antenna do you want to design? For example, I designed microstrip patch antenna before.

antenna types:
Yagi antenna
printed antenna
horn antenna
spiral antenna
like that...etc.

give some info about it.

regards,
lkuzu@yahoo.com
 

laza

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I think the best experimental antenna is the discone antenna. It has very high bandwidth, good impedance bandwidth, but small gain.
 

Jackal

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Mmana

Hi!

Try to use Mmana programm by JE3HHT
It's very simple programm, but simulation results are very good...
 

eirp

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I agree with laza that a suitable choice is the discone antenna. It's omnidirectional with "8" radiation pattern as lbda/2 dipole. Can cover frequencies fmin:fmax~1:4 so no problem for your band. I can send you detailed info about design.
Eirp
 

No Fear

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First I need to know if the 100MHz bandwidth is for VSWR( 2:1 or 3:1 ) or Gain -3dB from center Frequency.
Next the kind of pattern, ominidirectional or directional.
If directional, front/back ratio, gain etc.
But I can estimate something: If the array you are looking for is directional, the best choose is a Log Periodic Dipole Array.
Try to use a double boom to do the phase shift and feed the elements. I had best results with that arrange.
Hope to help
Regards

No Fear :roll:
 

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