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KFPA Noise Calibration Module (NCM) Eric Bryerton – NRAO CDL

KFPA Noise Calibration Module (NCM) Eric Bryerton – NRAO CDL. To Isolators. DC 5-pin. From OMT. Bethe Coupler. KFPA-7 NCM Compliance Matrix. KFPA NCM. MMIC LNA: UMS CHA2092b. P4. P1. P6. P3. P2. P5. 6-Port Bethe Coupler. P1: noise source P2: load for uncoupled noise cal power

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KFPA Noise Calibration Module (NCM) Eric Bryerton – NRAO CDL

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  1. KFPA Noise Calibration Module (NCM)Eric Bryerton – NRAO CDL To Isolators DC 5-pin From OMT Bethe Coupler

  2. KFPA-7 NCM Compliance Matrix

  3. KFPA NCM MMIC LNA: UMS CHA2092b

  4. P4 P1 P6 P3 P2 P5 6-Port Bethe Coupler P1: noise source P2: load for uncoupled noise cal power P4->P3, P6->P5: main signal path (OMT->isolator)

  5. 6-Port Bethe Coupler Coupling = -25 +/- 1 dB

  6. 6-Port Bethe Coupler Input Return Loss > 30dB

  7. 6-Port Bethe Coupler Directivity > 20dB (S31/S41) Channel-to-Channel Isolation > 50dB

  8. KFPA Noise Calibration Module #1S-parameter Measurements

  9. KFPA Noise Calibration Module #1Noise Measurements Noise Cal Module (T=33.0K) 297K / 77K Load LNA (T=25.3K) T=14.0K Downconverter + Detector

  10. KFPA Noise Calibration Module #1Noise Measurements VDS=0.71V, VGS=-0.53V, IDS=6mA

  11. KFPA-1 Laboratory Tcal Measurements VDS = 0.667V

  12. KFPA-1 Laboratory Tcal Measurements

  13. The standard deviation of the difference between the actual measurement and 4th degree polynomial fit is 7.5% of the measured value

  14. KFPA-1 Laboratory Tcal Measurements Between 9/4/08 and 9/25/08, NCM VDS bias was increased.

  15. Noise Cal Test Block Measurements 11mA 10mA 8mA VDS=0.85V -> PDC=6.8mW for bottom trace

  16. KFPA-7 NCM Production Schedule 31-Jan-09 CDR approval, production can begin 13-Mar-09 NCM blocks machined (using NRAO-CV machine shop) 27-Mar-09 NCM blocks plated 17-Apr-09 Units 1-3 assembled 8-May-09 Testing of units 1-3 complete; deliver units 1-3 8-May-09 Units 4-5 assembled 22-May-09 Testing of units 4-5 complete; deliver units 4-5 22-May-09 Units 6-7 assembled 5-June-09 Testing of units 6-7 complete; deliver units 6-7

  17. KFPA-7 NCM Compliance Matrix

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