Aethercomm Model Number SSPA 8.4-8.6-30 is a high power, Gallium Nitride (GaN), Solid State Power Amplifier (SSPA) employed on the Commercial Lunar Payload Services (CLPS) platform. This high-performance SSPA delivers 30 watts of linear power to the antenna. This SSPA offers good linearity while being excited by OQPSK modulation. The composite power added efficiency with a modulated input is ~27% across the transmit bandwidth @25C. All port VSWR’s 1.5:1 maximum. All harmonics are <-35 dBc. The input voltage is +28Vdc ±0.5 Vdc. Maximum average current is 5.75 Amps at 0 dBm Pin @25C. Standard features include reverse polarity protection, output short and open circuit protection, voltage and temperature telemetry. Nominal input drive is 0 dBm with a 44.8 dBm output power level with a maximum input of +10 dBm. This SSPA contains a circulator on the RF output port that provides open/short circuit protection to the high power GaN devices.
This GaN SSPA is designed and tested to thrive in space. It is used on a lunar lander space craft and launched from a Falcon 9 space vehicle. There is an SMA-F RF input port. There is a TNC-F RF output port. The volume of this RF module is 5.0”(L) by 2.0”(W) by 1.0”(H). This volume has a mass of 0.75 pounds. EMI/EMC best practices were applied to this design and verified. This SSPA was designed with >10dB of ionization/multi-paction margin. This RF amplifier is hermetically sealed. A 9-pin hermetic DSUB connector applies the voltages/command/ control/telemetry signals.
- Operation from 8.4 to 8.6 GHz minimum
- Composite PAE of >25% Across the Bandwidth
- GaN Technology
- 30 Watts Linear Output Power Minimum
- Volume is 5.0” (L) by 2.0” (W) by 1.0” (H)
- Mass = 0.75 lbs.