View Single Post
  #2   Report Post  
Old February 24th 08, 12:37 PM posted to rec.radio.amateur.antenna
Dave Dave is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 797
Default LPY antenna designs?


"K7ITM" wrote in message
...
Anyone have any practical LPY (log-periodic Yagi) antenna designs they
care to share? Something with about 4% or 5% bandwidth in the VHF/low
UHF range should do well--the element diameters should be appropriate
for scaling the design to my frequencies of interest. 10dBi or so
gain is probably fine.

Cheers,
Tom


define "log period yagi"??? ramsey has a line of products that they call
'log periodic and yagi' pcb antennas that has apparently been smushed into
"LPY" as the prefix to their part numbers... but 'Yagi' antennas are one
thing, and 'Log Periodic Dipole Array' antennas are something else. The
only place they cross practically that i have seen is the use of a log
periodic section feed section in between yagi style tuned parasitic elements
to give a wider bandwidth feed point... in this case it is usually just 2 or
3 elements worth of lpda feeding the yagi which i have always considered
just a way to add buzzwords to your antenna design description.