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2 Elements Yagi

2 Elements Yagi

Postby qrz11 » 13 Feb 2011, 13:18

* TNX to 19 SD 348 *

2 ELEMENTS YAGI

Image

The two elements yagi is the smallest one among the yagi family, it
produces there for the least gain of all.
It consist of only one Reflector (B) and one Radiating element (A).

The Gain given for a 2 elements yagi is in the order of 4,1 dBD
(260 watts on a dipool compared to 100 watt on this antenna)

There are manufacturers who give the impression that their 2 elements,
has a F/B of over 20 dB, Although I have done some tests (not on all 2 el
yagi's ofcourse) but not once was I able to reach these values.

Design freq = 27,55 Mhz
A = 5,04 m
B = 5,48 m
C = 1,00 m
Gain = 4,15 dBD
F/B = 11,5 dB
Beamwith H = 68,4 deg
Bandwith 700 khz
Element thickness 22 mm

Image

You can reach good results with a small antenna like this. It does provide
gain (directivity) and will often be an improvement to a single vertical
antena.



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