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Performance Data and Geometry
Pattern and VSWR
Download as File
YBN 850-13 Yagi
LTE Low Noise Yagi covering 800 to 860 MHz LTE band
Emphasising a high directivity factor over an extraordinary bandwidth predestinates this design to
boost the signal-to-noise level in difficult spots for reception or to manage a connect at all in rural places.
Judging this antenna by comparing forward gain against advertised other LTE Yagis may not tell the full story.
We often find quite opimistic gain numbers for boom length and bandwidth produced by marketing strategists. Not only on
the field of LTE antennas. However I believe the key to an impressive Signal-to-Noise ratio especially for a wideband
application is a very clean pattern. As whatever interfering signal occurring on the bandwidth of the receiving frontend
of the LTE unit can not be suppressed by filters. Which otherwise would block a part of the designated band.
To judge the abilities of a directive LTE antenna it takes both,
gain and pattern cleanness. As the pair defines the ratio of signal and amount of noise received with it, known as Antenna G/T.
Find more read about Antenna Temperature to Gain here
Attention: This is a directive antenna with a relatively high forward gain. Please keep transmission power inside the allowed limits
in accordance to your local Telecommunication Regulations. Here is a link to my EIRP-Online Calculator
YBN 850-13w with Digital TV antennas shown on the Hamradio 2015
YBN 850-13w with bent dipole (50 ohms)
Performance Data
Gain vs. isotr. Rad. 13.8 to 14.2 dBi
Gain vs. Dipole 11.7 to 12.1 dBD
-3 dB E-plane 37.6 deg.
-3 dB H-plane 42.0 deg.
F/B -24.2 to -28.3 dB
F/R -21.3 to -24.2 dB
Impedance 50 ohms
Mechan. Length 960 (1120)mm
Electr. Length 2.44 λ (840 MHz)
Weight appr. 410 gr. = 0.90 lbs
Stacking Dist. h-pol. (840 MHz)
top-to-bottom 0.50 m = 1.63 ft
side-by-side 0.55 m = 1.82 ft
Geometry
Pos. Full Length
Free Space
Refl. 0 194.0
DE 76 175.0
D1 98 157.0
D2 154 155.0
D3 239 149.0
D4 357 145.0
D5 481 143.0
D6 615 140.0
D7 758 133.0
D8 890 130.0
Ele. 4 mm
Dipole 5 mm
How often has this antenna been looked up since early June 2015?
Pattern and VSWR Plots
Elevation and Azimuth plots from 820 to 860 MHz
Azim Plot at 840 MHz
Elev. Plots at 820, 840, 860 MHz
SWR plot - simulated
Downloads
EZNEC file of this Yagi (4 mm ele.)
73, Hartmut, DG7YBN
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