8 thoughts on “4 elements Quagi antenna for 50 Mhz”
DEAR HAM FRIEND,
I MAKE SAME ANTENNA AND I HAVING VERY GOOD RESULTS!
HAVE NICE DAY AND MANY THANKS!
MIKE 73 DE Z32MA
50.115 EVERY DAY AFTER 16:00 LOC TIME
Hy Roberto,
Y try to make thus Antenna……….Looks very good !
73 9A7PJT
You could add at least some performance data… OK, here you are my NEC2 simulation results (I used copper conductivity for the 1.3mm wire and aluminum for the two directors):
Resonance 50.8 MHz, SWR 1.57, Forward Horizontal gain 10.01dBi, efficiency 99.2%.
One of the main benefit of the Quagi design is to provide nearly 50 ohm impedence @ resonance, this design does not provide such a benefit –> needs matching network, otherwise ERP is dramatically reduced. BTW, the secondary lobes are sligthly backward oriented.
Regards
IK1HGE
The swiss quad the best for me.
Good Morning.
tink you for the Quagi Antenna.
pse visit my Web Site, (300 links for the Antennas) http://f8bdx.free.fr
i had a problem for the alimentation of this antenna ! How many distance on hot quad ?
There’s nobody to give me an idea !!!!!!! a real explication
What is the actual circumferences of the reflector and driven elements ? The numbers on the poor diagram don’t seem to add up properly. I am unable to get this thing to not need a matching device at the feed. Driven seems way too small. .763 m x 4 is 3.052, over half wave, less than full wave. Resonant full wave at 50.6 is 5.927 m. What are the actual dimension ?
DEAR HAM FRIEND,
I MAKE SAME ANTENNA AND I HAVING VERY GOOD RESULTS!
HAVE NICE DAY AND MANY THANKS!
MIKE 73 DE Z32MA
50.115 EVERY DAY AFTER 16:00 LOC TIME
Hy Roberto,
Y try to make thus Antenna……….Looks very good !
73 9A7PJT
You could add at least some performance data… OK, here you are my NEC2 simulation results (I used copper conductivity for the 1.3mm wire and aluminum for the two directors):
Resonance 50.8 MHz, SWR 1.57, Forward Horizontal gain 10.01dBi, efficiency 99.2%.
One of the main benefit of the Quagi design is to provide nearly 50 ohm impedence @ resonance, this design does not provide such a benefit –> needs matching network, otherwise ERP is dramatically reduced. BTW, the secondary lobes are sligthly backward oriented.
Regards
IK1HGE
The swiss quad the best for me.
Good Morning.
tink you for the Quagi Antenna.
pse visit my Web Site, (300 links for the Antennas)
http://f8bdx.free.fr
i had a problem for the alimentation of this antenna ! How many distance on hot quad ?
There’s nobody to give me an idea !!!!!!! a real explication
What is the actual circumferences of the reflector and driven elements ? The numbers on the poor diagram don’t seem to add up properly. I am unable to get this thing to not need a matching device at the feed. Driven seems way too small. .763 m x 4 is 3.052, over half wave, less than full wave. Resonant full wave at 50.6 is 5.927 m. What are the actual dimension ?