11/30/25, 6:11 PM
Extended Hata Model
Extended Hata Model
The Okumura-Hata model was extended to the frequency bands from 30 MHz to 3000 MHz[1] . This combination is denoted as the “Extended Hata
model”.
Activate the extended Hata model on the Parameters of Okumura Hata dialog, under Frequency, select the Use extended Hata model (covers the
frequency range 30 MHz - 3 GHz) check box (see Figure 2).
Urban
30 MHz < f ≤ 150 MHz:
(1)
L = 69.6 + 26.2 log(150) − 20 log (
150
f
) − 13.82 log (max {30, Hb })
+ [44.9 − 6.55 log (max {30, Hb })] log (d)
α
− a (Hm ) − b (Hb )
150 MHz < f ≤ 1500 MHz:
(2)
L = 69.6 + 26.2 log(f ) − 13.82 log (max {30, Hb })
+ [44.9 − 6.55 log (max {30, Hb })] log (d)
α
− a (Hm ) − b (Hb )
1500 MHz < f ≤ 2000 MHz:
(3)
L = 46.3 + 33.9 log(f ) − 13.82 log (max {30, Hb })
+ [44.9 − 6.55 log (max {30, Hb })] log (d)
α
− a (Hm ) − b (Hb )
2000 MHz < f ≤ 3000 MHz:
L = 46.3 + 33.9 log(2000) + 10 log (
f
2000
(4)
) − 13.82 log (max {30, Hb })
+ [44.9 − 6.55 log (max {30, Hb })] log (d)
α
− a (Hm ) − b (Hb )
Suburban
min {max {150, f } , 2000}
L = L(urban) − 2{log [
28
(5)
2
]}
− 5.4
Open Area
L = L(urban) − 4.78l{log [min {max {150, f } , 2000}]}
2
(6)
+ 18.33 log [min {max
Where,
L = path loss (dB)
f = frequency (MHz)
Hb = transmitter antenna height above ground (m)
Hm = receiver antenna height above ground (m)
d = distance between transmitter and receiver (km)
a(Hm), b(Hb) = antenna height correction factors, defined as follows:
(7)
https://help.altair.com/winprop/topics/winprop/user_guide/proman/propagation_models/proman_prop_model_hata_extended.htm
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11/30/25, 6:11 PM
Extended Hata Model
a (Hm ) = (1.1 log(f ) − 0.7) min {10, Hm } − (1.56 log(f ) − 0.8) + max {0, 20 l
b (Hb ) = min {0, 20 log (
Hb
30
)}
The exponent α is a distance correction factor for distances > 20 km, defined as follows:
(8)
⎧
1
α = ⎨
⎩ 1 + (0.14 + 1.87 × 10−4 f + 1.07 × 10−3 H ) (log
b
for
0.8
d
20
)
for
20 km
<
with the following model restrictions:
f: 30MHz to 3000 MHz
Hb: 30m to 200 m
Hm: 1 m to 10 m
d: 0.1 km to 100 km, but in practice, it is recommended to use it up to 40 km.
1. Report ITU-R SM.2028-2 “Monte Carlo simulation methodology for the use in sharing and compatibility studies between different radio services or
systems”, section 6.1, published June 2017.
https://help.altair.com/winprop/topics/winprop/user_guide/proman/propagation_models/proman_prop_model_hata_extended.htm
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