EIRP -Effective Isotropic Radiated Power.

[SENTHIL KUMAR]

EIRP means Effective Isotropic Radiated Power.

In antenna measurements, the measured radiated power in a single direction is known as the EIRP.

Simply says,

The power gained by dish from satellite in the unit of dB.

If the EIPR value is high then you can able to catch the satellite with small size dish.

If the EIPR value is low then you required a big dish to catch the satellites.

For examble,

In my area ( Thiruvarur, Tamilnadu )

Thaicom-5 required 170 Cm dish - EIPR value is 39.

But in Delhi

Thaicom-5 required 230 Cm dish - EIPR value is 36.

Following table contains EIRP values for the C band and required dish size.

UNIT OF EPIR IS CALLED dbw



42.0 dBW - 110 cm
41.5 dBW - 120 cm
41.0 dBW - 130 cm
40.5 dBW - 140 cm
40.0 dBW - 150 cm
39.5 dBW - 160 cm
39.0 dBW - 170 cm
38.5 dBW - 180 cm
38.0 dBW - 190 cm
37.5 dBW - 200 cm
37.0 dBW - 210 cm
36.5 dBW - 220 cm
36.0 dBW - 230 cm
35.5 dBW - 240 cm
35.0 dBW - 250 cm
34.5 dBW - 260 cm
34.0 dBW - 270 cm
33.5 dBW - 280 cm
33.0 dBW - 290 cm
32.5 dBW - 300 cm
32.0 dBW - 310 cm
31.5 dBW - 320 cm
31.0 dBW - 330 cm
30.5 dBW - 340 cm
30.0 dBW - 350 cm
29.5 dBW - 360 cm

Following table contains EIRP values for the Ku band and required dish size.

50 dBW - 60 cm
49 dBW - 60 cm
48 dBW - 60 cm
47 dBW - 75 cm
46 dBW - 80 cm
45 dBW - 90 cm
44 dBW - 90 cm
43 dBW - 100 cm
42 dBW - 110 cm
41 dBW - 120 cm
40 dBW - 120 cm
39 dBW - 135 cm
38 dBW - 150 cm
37 dBW - 180 cm
36 dBW - 240 cm
35 dBW - 300 cm
34 dBW - 355 cm