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TX TPO: 100Watts ( +50dBm )

TX TPO: 100Watts ( +50dBm ). Start with a Transmitter. Line Loss - 1dB. TX TPO: 100Watts (+50dBm). Add some transmission line. Antenna Gain +9dB. Line Loss -1dB. TX TPO: 100Watts (+50dBm ). And an antenna. Radome Loss - .5dB. Antenna Gain +9dB. Line Loss -1dB.

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TX TPO: 100Watts ( +50dBm )

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  1. TXTPO: 100Watts(+50dBm) Start with a Transmitter

  2. Line Loss -1dB TXTPO: 100Watts(+50dBm) Add some transmission line

  3. Antenna Gain +9dB Line Loss -1dB TXTPO: 100Watts(+50dBm) And an antenna

  4. Radome Loss -.5dB Antenna Gain +9dB Line Loss -1dB TXTPO: 100Watts(+50dBm) Plus a radome for ice protection

  5. Radome Loss -.5dB Antenna Gain +9dB ERP: 57.5dBm(562Watts) Line Loss -1dB TXTPO: 100Watts(+50dBm) Now compute the Effective Radiated Power

  6. Radome Loss -.5dB Antenna Gain +9dB Free Space Loss -109dB (44 miles on 155 MHz) Path Loss -50dB (Terrain obstructions, vegetation, buildings on path to this point) Line Loss -1dB TXTPO: 100Watts(+50dBm) Compute losses to a receive location

  7. 17.3 dBu Field Strength (-101.5 dBm hypothetically) Radome Loss -.5dB Antenna Gain +9dB Since the energy in the field is only converted to power when the field is applied (as a voltage) across an impedance, this power value is for this illustration only, assuming a 50 Ohm impedance value. Free Space Loss -109dBPath Loss -50dB Line Loss -1dB TXTPO: 100Watts(+50dBm) Compute field strength at the location

  8. 17.3 dBu “-101.5 dBm” Handheld Radome Loss -.5dB Antenna Gain +9dB Antenna Gain 0dB Free Space Loss -109dBPath Loss -50dB Line Loss -1dB Line Loss -.5dB TXTPO: 100Watts(+50dBm) RXThreshold: 0.7uV(-110dBm) RSL -102dBm Now consider a particular receiver at that location

  9. 17.3 dBu “-101.5 dBm” Handheld Radome Loss -.5dB Antenna Gain +9dB Antenna Gain 0dB Body Loss -20dB Free Space Loss -109dBPath Loss -50dB Line Loss -1dB Line Loss -.5dB TXTPO: 100Watts(+50dBm) RXThreshold: 0.7uV(-110dBm) RSL -122dBm Add localized losses

  10. 17.3 dBu “-101.5 dBm” Handheld Vehicle Radome Loss -.5dB Antenna Gain +9dB Antenna Gain 0dB Antenna Gain +6dB Body Loss -20dB Free Space Loss -109dBPath Loss -50dB Line Loss -1dB Line Loss -.5dB Line Loss -.5dB TXTPO: 100Watts(+50dBm) RXThreshold: 0.7uV(-110dBm) RXThreshold: 0.5uV(-113dBm) RSL -122dBm RSL -96dBm Consider other receiver configurations at the same location

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