11 elements Yagi-Uda antenna

Antenna description:
11 elements Yagi-Uda design for UHF spectrum;
Radioastronomy Band 406.1 - 410.0 MHz;
Boom length 3.3873 Wavelength; i.e. 2.489m@408MHz;
Front/Rear ratio >= 20dB both E/H plane;
Gain >= 15.4 dBi; i.e. >= 13.25 dBd;
Impedance = 50.0 Ohm +/- j0.0 Ohm;
(need 1:1 balun with 180° phase shifter);
Bandwidth >= 1% (i.e. 4MHz@408MHz)
SWR <= 1.03 : 1
elements by aluminum tube T6060
Warning: this is not a tested antenna, for
home brewing select your own design then cut-try and measure.

Radiation pattern Yagi-Uda antenna model n° 200FR154G500Z_406_410_MHz

dimension in wavelength:

full elements, in wavelengths:
   pos./diam.  0.0136

Ref  0.0000    0.4886
DE   0.2681    0.4614
D1   0.4015    0.4300
D2   0.6355    0.4232
D3   1.0030    0.4096
D4   1.3718    0.4002
D5   1.7855    0.3974
D6   2.2047    0.3946
D7   2.6197    0.3920
D8   3.0212    0.3878
D9   3.3873    0.3864

dimension in mks (example @ 408 MHz):

full elements, in centimeters:
   pos./diam.   1.0000
   
Ref   0.0000   35.9000
DE   19.7000   33.9000
D1   29.5000   31.6000
D2   46.7000   31.1000
D3   73.7000   30.1000
D4  100.8000   29.4000
D5  131.2000   29.2000
D6  162.0000   29.0000
D7  192.5000   28.8000
D8  222.0000   28.5000
D9  248.9000   28.4000

[ index page ] [ basics 1 ] [ basics 2 ] [ measure ] [ acronym and definitions ] [ sample/repository: ] [ 3 elements Yagi-Uda ] [ 4 elements Yagi-Uda ] [ 5 elements Yagi-Uda ] [ 6 elements Yagi-Uda ] [ 7 elements Yagi-Uda ] [ 8 elements Yagi-Uda ] [ 9 elements Yagi-Uda ] [ 10 elements Yagi-Uda ] [ 11 elements Yagi-Uda ] [ Coaxial Balun ] [ Link to us; Free code ] [ Terms of use; Disclaimer; Privacy policy ] [ site map; contents ]

HTML valid CSS valid