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Exodus Advanced Communications Best in Class RF Amplifier SSPAs

BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Wireless Link Budget

A link budget commonly refers to the complete gain and loss equation from the transmitter, through the ambient medium (air, cable, waveguide, fiber, etc.) and through to the receiver. Although the complete equation would incorporate many terms, the high-level block diagram shown below is often used.

See the 1-Way Path Loss and 2-Way Path Loss calculators.

P_rx = P_tx + G_tx + G_rx - A_fs - A_m

where:	P_rx = received power at detector ( dBW )
	P_tx = transmitter output power ( dBW )
	G_tx = transmitter antenna gain ( dBi )
	G_rx = receiver antenna gain ( dBi )
	A_fs = free space attenuation ( dB )
	A_m = miscellaneous attenuation ( radome, rain, etc. )

Link budget

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