Sheet1 Page 1 RF Calculator for Microsoft Excel spreadsheet program 1. Find Free Space (clear line of sight) Path Loss Enter 460.0000 MHz Enter 2.0000 miles, Path length Answer 95.8758 dB Path Loss 2. Convert watts to dBm and dBW Enter 4.0000 watt Answer 36.0206 dBm Answer 6.0206 dBW 3. Convert dBm to watts Enter 30.9690 dBm Answer 1.2500 watts 4. Convert uV to dBm (50 ohm impedance) Enter -23.1700 uV Answer -79.6912 dBm 5. Convert dBm to uV (50 ohm impedance) Enter 23.6700 dBm Answer 3411811.2914 uV 6. Convert dBW to uV (50 ohm impedance) Enter -16.9897 dBW Answer 1000.0000 uV Convert dBuV to dBm Enter 30 dBuV Answer -77 dBm 7. Calculate Vertical Ant - Ant Isolation (dipole up/down gain = 0) Enter 0.0000 dB: Top antenna gain toward bottom ante Enter 0.0000 dB: Bottom antenna gain toward top ante Enter 10.0000 feet (Vertical separation) Enter 450.0000 MHz Answer 54.4087 dB Isolation 8. Calculate Horizontal Ant - Ant Isolation (dipole left/right gain = 0) Enter 0.0000 dB: Left antenna gain toward right ante Enter 0.0000 dB: Right antenna gain toward left ante Enter 100.0000 feet(Horiz) Enter 450.0000 Mhz Answer 55.2043 dB Isolation 9. Convert dBm and Freq. to Field Strength in dBu and uV/meter (relative to a d Enter 450.0000 MHz
Sheet1RF Calculator for Microsoft Excel spreadsheet program1.
Find Free Space (clear line of sight) Path
LossEnter460.0000MHzEnter2.0000miles, Path lengthAnswer95.8758dB
Path Loss2. Convert watts to dBm and
dBWEnter4.0000wattAnswer36.0206dBmAnswer6.0206dBW3. Convert dBm to
wattsEnter30.9690dBmAnswer1.2500watts4. Convert uV to dBm (50 ohm
impedance)Enter-23.1700uVAnswer-79.6912dBm5. Convert dBm to uV (50
ohm impedance)Enter23.6700dBmAnswer3411811.2914uV6. Convert dBW to
uV (50 ohm impedance)Enter-16.9897dBWAnswer1000.0000uVConvert dBuV
to dBmEnter30dBuVAnswer-77dBm7. Calculate Vertical Ant - Ant
Isolation (dipole up/down gain = 0)Enter0.0000dB: Top antenna gain
toward bottom antennaEnter0.0000dB: Bottom antenna gain toward top
antennaEnter10.0000feet (Vertical
separation)Enter450.0000MHzAnswer54.4087dB Isolation8. Calculate
Horizontal Ant - Ant Isolation (dipole left/right gain =
0)Enter0.0000dB: Left antenna gain toward right
antennaEnter0.0000dB: Right antenna gain toward left
antennaEnter100.0000feet(Horiz)Enter450.0000MhzAnswer55.2043dB
Isolation9. Convert dBm and Freq. to Field Strength in dBu and
uV/meter (relative to a
dipole)Enter450.0000MHzEnter-100.0000dBmAnswer28.0643dBuAnswer25.3054uV/meter10.
Calculate distance to horizon (smooth earth)Enter5000.0000feet,
ant. heightAnswer100.0000miles
