Re: LPY antenna designs?

On Wed, 27 Feb 2008 22:29:01 -0500, no@xxxxxxxx wrote:

On Tue, 26 Feb 2008 23:02:37 -0800 (PST), K7ITM <k7itm@xxxxxxx> wrote:
Let's see...500MHz to 1.05*500MHz = 525MHz; boom long enough to get me
about 10dBi over that range. I'll scale it to my particular
frequencies of interest, so any other ~5% bandwidth in that general
vicinity of frequencies would be fine too.

Cheers,
Tom

Log-Yagi design. Four driven elements, reflector & director.
Probably about 8 dBi maybe.

Ele Length Position
R 1.019' 0
DR1 0.984' 0.168'
DR2 0.924' 0.266'
DR3 0.868' 0.359'
DR4 0.815' 0.446'
D 0.902' 0.742'

Split DR1-DR4 and transpose feed. Place hairpin at DR1 if needed
for matching.

.

Relevant Pages

  • Re: LPY antenna designs?
    ... I'll scale it to my particular ... so any other ~5% bandwidth in that general ... vicinity of frequencies would be fine too. ... Thanks for both those designs. ...
    (rec.radio.amateur.antenna)
  • Re: Artificial brain within 10 years.
    ... bandwidth is the difference between the highest and lowest frequencies ... frequencies results in greater bandwidths at higher frequencies. ... The bandwidth in olden times of tuned LC circuits was related to the ... AM radio, the bandwidth required (if I remember correctly from my ...
    (talk.origins)
  • Re: Artificial brain within 10 years.
    ... bandwidth is the difference between the highest and lowest frequencies ... The bandwidth in olden times of tuned LC circuits was related to the ... AM radio, the bandwidth required (if I remember correctly from my ... AM radio gets about 10 kHz per station, only allowing 5 kHz of signal ...
    (talk.origins)
  • Re: Do we really need theory?
    ... Or is it a log scale so the ratio between each note is 1.104089514 ... > Note/Pitch Pitch Ratio Pitch Frequency ... > Note that except for F all pitch frequencies are integers. ...
    (rec.music.theory)
  • Re: Typos
    ... frequencies which is occupied by a modulated carrier wave, ... overmodulated signal with excesssive bandwidth. ...
    (alt.usage.english)