ADTRAN 2 x E1 user manual Antenna Feedline Loss, Antenna Gain

61280004L2-1C

Section 2 Installation

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.

		IF Loss/100 feet		2.4 GHz RF Loss/100 feet		5.7 GHz RF Loss/100 feet
Cable			(in dB)		(in dB)		(in dB)
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
1	5/ " 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	2.4 GHz Gain	5.8 GHz Gain
(in cm)	(in dBi)	(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

TRACER 2 x E1 User’s Manual 15