[SFDXA] InnovAntennas to launch a new 'reflector-less' Yagi at the RSGB Hamfest

Bill bmarx at bellsouth.net
Wed Sep 17 14:48:16 EDT 2014


*From QRZ:
http://forums.qrz.com/showthread.php?450619-InnovAntennas-to-launch-a-new-reflector-less-Yagi-at-the-RSGB-Hamfest

InnovAntennas* will launch a new reflector-less Yagi at this year’s 
Newark hamfest.
The LFA-R is a gain-focused Yagi presented in a light-weight package for 
VHF and available in two band versions for certain HF bands (through 
Force 12).

More information on this antenna and its capabilities can be found at 
the InnovAntennas website and also a full article presentation has been 
published in the current issue of DUBUS magazine.
http://www.innovantennas.com/latest-news.html

"The LFA-R started form as an HF antenna, one of the many new antennas 
in the force 12 range. With a single flat, driven loop and one director, 
I was surprised just how much F/B was achieved along with excellent 
levels of gain too. Many element versions where not practical for HF so 
the experiments shifted to VHF and this is where the LFA-R really came 
into it's own.

The LFA-R uses a compact LFA loop at the back of the boom and has no 
reflector element at all. The arrangement of phase presents itself in 
much the same way as it does within an HB9CV. However, this loop is 
completely joined (or course) all the way around. Only director element 
follow the driven so on a 5 element version (such as the above shown 
example) you have 4 directors rather than the traditional 3 directors a 
typical Yagi would have. This, along with the driven element being moved 
further back on the boom that the traditional Yagi means more gain can 
be achieved."




More information about the SFDXA mailing list