[Antennas] VSWR on Log Periodic.

2002年4月25日 10:33:43 -0500

Hi, Dave
Thanks for the summary. Although I have never used an LPDA I am familiar
with their theory and construction and overall performance capabilties.
Under different circumstances there would be one on a 100 ft tower in my
back yard right now! As it is I must be content with many wires in many
trees! <:}
The point of my question was to try to understand what additional
attributes of the antenna you were implying with the SWR data other than
ease of loading over a wide frequency range. A properly designed and
executed LPDA can be expected to provide the SWR coverage you described, so
I was "fishing' to see "what else" you had surmised from the data which
basically only confirms that your LPDA had been well designed and
implemented.
Always looking out for something new to learn about this business, Dave! 
<:}
73/72/oo, George W5YR - the Yellow Rose of Texas 
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe 
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
Icom IC-756PRO #02121 Kachina 505 DSP #91900556 Icom IC-765 #02437
Dave Shrader wrote:
>> George,
>> It is a broadband 5 band high efficiency antenna with moderate gain [5.8
> dBd}] and fair to VG F/B. It offers a 5 band solution with gain at less
> cost than than 5 monobanders, or a tribander with add on dipoles, or
> competitive or a tribander with add on elements.
>> It my opinion it is the most economical solution to a 5 band [20 - 10]
> gain antenna. Gain is basically constant and at high efficiency.
>> The ARRL Antenna Book provides an excellent discussion of LP
> performance.