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Constant impedance response to infinity with point radiation
Having made small full wave antenna with a swr in Sino soidal form
ie reactance which is quite normal I decided to get back to basics and view it as a pendulum ala a tank circuit equivalent lwhere lengthening the pendulum changes the peried.with consequent damping via incresing of "slow wave" Doing this to the antenna structure provided an antenna that did not exceed a swr of 4 from 2 mhz upto a 100 Mhz.plus ( very few deviations above 3:1) What the dampening did was to smooth out the resistive and reactive values to produce a response very similar to a log periodic except, of course. it was a small full wave electric antenna with a omni directional response. ( it can be made directional) Tried it also on the local TV stations (60 miles away) and it worked extremely well such that it looked like HDTV! Again this points out the requirement for equilibrium of antennas in tank circuit form. With care, an antenna can now be made with extremely flat response for ALL frequencies since the impedance can be made near constant.By the way the antenna took 200 watts key down for 1 min without any hint of failure.( the impedance reference value was 50 ohms and a MFJ 259B was used tho any datum impedance can be chosen) Whether my theories are correct or not with respect to academia, to have such antennas in practice where responses can be measured it would behove hams to replicate them and allow the academics to follow up later. Will now modify some rubber duckies for the local police force to extend the distance range as our county is quite large. Regards Art Unwin KB9MZ......XG (uk) |
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