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Cryogenic Amplifiers for the Band 7 and Band 9 Cartridges

This work package involves the design, development, and pre-production of cryogenic amplifiers for Band 7 and Band 9 Cartridges. The goals are to provide cryogenic IF amplifiers to ESO for the European Cartridges and achieve state-of-the-art performance. The present status includes the design completion for Band 7 amplifiers and the delivery of prototype units.

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Cryogenic Amplifiers for the Band 7 and Band 9 Cartridges

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  1. Cryogenic Amplifiers for the Band 7 and Band 9 Cartridges Juan Daniel Gallego MADRID

  2. Work Package(s) Description • DEVELOPMENT: design and development of cryogenic amplifiers for the Band 7 and Band 9 Cartridges. including laboratory testing, manufacture of prototypes, and support of design reviews. Deliverables: (10) Band 7 and (2) Band 9 cryogenic amplifier prototype units • PRE-PRODUCTION: fabrication, assembly, testing, delivery and support of (32) Band 7 and (16) Band 9 cryogenic amplifier pre-production units (8 antennas). • BAND 7 IF: 4-8 GHz • BAND 9 IF: 4-12 GHz MADRID

  3. Goals • Provide Cryogenic IF amplifiers to ESO for the two European Cartridges. Band 7 (IRAM) and Band 9 (NOVA) • Obtain State of the Art performance (InP HEMT devices): • Wide instantaneous band (4-8 and 4-12 GHz) • Low noise • Limited power dissipation • Low gain fluctuations • High reliability • Produce and Test the amplifiers within schedule MADRID

  4. Problems • InP HEMTs procurement  ESO responsibility. Needed soon (June 2004!) • Founding for development in Europe (ETH, Franhofer) needed. • HRL? • TRW? • Amplifier Specifications under discussion • Highly dependant on InP HEMTs • Complexity of contracts similar to space projects • Development done with OAN-IGN founds (contract for development and pre-production in preparation) MADRID

  5. Problems: COST • Initially (agreement): 1382 Keuro for both work packages. • Present Draft Contract: 340 Keuro (covers development and pre-production units for 8 antennas) • Estimated cost for production units: 4 Keuro/unit • Total cost (pre-production + production): 340+5664=1684 Keuro • Extra cost: 22% • Estimation assumes: • No spares • No changes in receiver configuration (number of amplifiers) MADRID

  6. Present Status • Band 7 amplifiers (4-8 GHz): • Design done (TRW+ETH InP HEMTs) • 10 prototype units built and delivered to IRAM, NOVA • No payment received yet. • Band 9 amplifiers (4-12 GHz) • Design not finished yet • 2 prototype units to be delivered (May 2004?) MADRID

  7. Present Status • Lab equipment: • Dedicated Noise Figure Meter received • Dedicated Cryostat in construction (to be received in March 2004) • Dedicated Vector Network Analyzer to be bought in 2004 • Wire bonding machine to be bought in 2004 • Industrial production • TTI (Santander), (other companies already contacted) • Contract to be signed with IRAM for production of 56 amplifiers • Experience with this contract could be used for ALMA MADRID

  8. YCA 2000 (4-8 GHz) MADRID

  9. YCA 2000 (4-8 GHz) MADRID

  10. Results expected by end 2004 • Contract for Development and Pre-production signed with ESO • Specifications for band 7 and band 9 clarified • InP devices for contract (300) acquired by ESO and delivered to OAN • Band 9 amplifiers (4-12 GHz) design done, 2 prototypes delivered • Measurement Cryostat finished and tested • Dedicated Vector Network Analyzer acquired • Dedicated Wire Bonding Machine acquired MADRID

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