AntennaTransceiver

0651-EX-CN-2018 Text Documents

Sonoma State University

2018-08-27ELS_214926

Flight Antenna – Simple Dipole Design Flight Equipment Transmitter RFM22B

Note: This flight and ground system shown here have worked with a previous CubeSat see URL: //lbym.sonoma.edu/T-LogoQube (aka Eagle1 by AirForce). We can operate our RFM22B transceiver at a lower rate ~500 baud if we need extra bandwidth margin. Ground System

The Spacecraft uses the following receive and transmit frequencies. Note: Discrete values are expected rather than ranges. Description Transmitter 1 Communication System Nominal String RFM22BP Carrier Frequency, MHz 437.465 MHz 3 dB Bandwidth, MHz ~0.005 MHz Necessary Bandwidth per NTIA redbook, MHz 0.0083 MHz 20 dB Bandwidth, MHz ~0.012 MHz 60 dB Bandwidth, MHz ~0.028 MHz Receiver sensitivity, dBW -145 dBW Antenna gain, dBi 2.2dBi Modulation type and characteristics (total data GMSK 9600 baud rate) Receiver Input Damage Threshold*, (line loss Unknown, presumed high included), dBm with antenna stowed. Receiver span (MHz) 40 MHz Intermediate frequency, MHz 937 kHz Local Oscillator frequency, MHz 436.528 MHz Transmit Antenna output (EIRP), dBW 1.8 dBW Receive Antenna Flux Density, dBW/m2 Simplex mode: RX off (receiver ON) when TX on. Antenna Description, Polarization Dipole, linear Operating on PAD No Operating during launch No Ground Equipment output power, dBm 20 dBm *If Spaceflight is not provided Receiver Input Damage Threshold, Spaceflight will assume -40dBm.


Document Created: 2018-08-27 13:45:46
Document Modified: 2018-08-27 13:45:46
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