... So, the target of this research is to design and calculate a directive antenna, called logperiodical antenna, and selected according to requirements that are in the hypothesis of the project.
Logperiodical antenna as one of the most useful directive antennas is a very famous antenna because of its ideal broadbandness and electric characteristics. However, the length of this antenna is too much big with respect to the antenna gain. So, the task in this research is to develop a way in order to design an antenna which works in the whole frequency range and also has a small size to be able to be competitive in the market of antennas technology. ...
(picture 1 a,b,c)
“ half-wave antenna with its current distribution and its antenna patterns in E and H planes”
If a half-wave vibrator turns out not enough effective in data concrete terms, aerial can be complicated by addition another element - reflector which considerably loosens the reception from back direction and strengthens from main. ...
(picture 2 a,b)
“Simple Yagi antenna with 3 elements; Yagi antenna with a lot of elements”
(picture 3 a,b)
“Antenna patterns for the 2 cases in E plane”
A plenty of different aerials of the type "Wave channel" is developed.
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