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Antenna Feedline Loss
Feedline loss is a function of feedline type and length. Feedline loss per 30.48 meters (100 feet) for
several types of coax at IF and RF frequencies is detailed in the table below. The IF loss applies to BBP/
RFC interconnection, and the RF loss applies to RFC/antenna interconnection. Cable manufacturers'
specifications may vary.
Cable
RG58 ..................................................... 5.7 ................................... 80 ............................................ N/A
RG8 (air) ............................................... 2.7 ................................... 20 ............................................ N/A
RG8 (foam) ............................................ 2 ...................................... 9 ............................................. N/A
1
/
" Coax ............................................... 1.42 ................................ 5.91 ......................................... 11.36
4
3
/
" Coax ............................................... 1.25 ................................ 5.76 .......................................... 9.65
8
1
/
" Coax ............................................... 0.81 ................................ 3.83 .......................................... 6.49
2
7
/
" Coax ............................................... 0.44 ................................. 2.2 ............................................ N/A
8
1
1
/
" Coax ............................................ 0.33 ................................ 1.62 ........................................... N/A
4
5
1
/
" Coax ............................................ 0.27 ................................ 1.41 ........................................... N/A
8
5.8 GHz Elliptical Waveguide ............. N/A ................................ N/A .......................................... 1.23
Antenna Gain
Best performance will result from the use of a parabolic dish antenna. Antenna gain is determined by the
size of the dish, with typical figures detailed below. Dish manufacturers will be able to supply gains for
other types of antenna.
Dish Diameter
TRACER 2 x E1 User's Manual
IF Loss/100 feet
(in dB)
2.4 GHz Gain
(in cm)
(in dBi)
60 .................................... 21 .............................. 28.5
120 ................................... 27 .............................. 34.2
180 ................................... 31 .............................. 37.5
243 ................................... 33 .............................. 40.7
304 ................................... 35 .............................. 42.5
365 ................................... 37 .............................. 44.2
Section 2 Installation
2.4 GHz RF Loss/100 feet
(in dB)
5.8 GHz Gain
(in dBi)
61280004L2-1C
5.7 GHz RF Loss/100 feet
(in dB)
15
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