Mini-PHM Passive Hydrogen Maser
Leonardo SpA (Space Division)
Miniaturized space passive hydrogen maser atomic clock: 12kg, <=54W, ADEV 6.5e-13 @ 1s, <1e-15/deg C thermal sensitivity, next-gen Galileo program, developed under ESA/ASI contract.
Technical specifications
- Output Frequency
- 10.00285741 MHz (fH/142)
- Output Level
- +7 dBm
- Frequency Drift/Day
- <=1e-14 (after 1 week); <1e-15 (after 30 days)
- ADEV @ 1 s
- 6.5e-13
- ADEV @ 100 s
- 6.3e-14
- ADEV @ 10,000 s
- 7e-15
- Thermal Sensitivity
- <1e-15/deg C
- Voltage Sensitivity
- <=3e-15/V
- Dimensions
- 210 x 485 x 218 mm
- Mass
- 12 kg
- Supply Voltage
- 50 V +/-1 V
- Power
- <=54 W @ -5 deg C; <=47 W @ +10 deg C baseplate
- Qualification Temp
- -15 to +20 deg C
- Design Lifetime
- >12 years MEO
About
The Leonardo Mini-PHM (Miniaturized Passive Hydrogen Maser) is a compact space atomic clock developed under ESA/ASI contract in partnership with Orolia Switzerland, aimed at the Galileo Next Generation program. It achieves the same frequency stability as the full-size PHM but in a lighter, more compact package with reduced power consumption and improved environmental sensitivity. Output frequency is 10.00285741 MHz (hydrogen hyperfine divided by 142) at +7 dBm. Frequency drift is less than 1e-14 per day after 1 week and less than 1e-15 per day after 30 days. Allan deviation reaches 6.5e-13 at 1 second integration, 6.3e-14 at 100 seconds, and 7e-15 at 10,000 seconds. Mass 12 kg; power less than 54W at -5 deg C baseplate. Temperature frequency sensitivity less than 1e-15 per deg C. Design lifetime greater than 12 years in MEO.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
