STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 1 STARLight Objective To design, build and test RF front end receiver as small as possible, meeting requirements and within budget. Strategy Parts search and noise budget iterations STAR Light PDR – 3 October 2001 RF RECEIVER Line van Nieuwstadt ,

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 2 STARLight Outline: Requirements & Noise Budget Block Diagram Component Selection and Trade-offs Component Testing and Summary Test plan for 2-channel propotype STAR Light PDR – 3 October 2001

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 3 STARLight STAR Light PDR – 3 October 2001 Requirements (from Noise Budget) Frequency: GHz +/- 10MHz NF: 2.5 dB Gain: ~ 90 dB Pdc : < 8.5 Watts Size : ~ 5” x 5” x 1.5” (12.5 cm x 12.5 cm x 4cm) Weight : < 300 gr. Temp: –30C to +40C (operating)

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 4 STARLight STAR Light PDR – 3 October 2001

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 5 STARLight STAR Light PDR – 3 October 2001 DC Power Summary:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 6 STARLight STAR Light PDR – 3 October 2001 Selected parts specs: AMP: MAAM A1 Freq.: 1.2 – 1.75 GHz Gain: 26 dB +/- 0.8 dB NF: 1.35 dB VSWR: 1.4:1 P1dB: 14 dBm Pdc: 85mA (0.43 W) Temp.: -55C to +125C Power Divider: MECA Frequency: GHz Insertion Loss: 0.8 dB (above 9 dB) Ampl. Imbalance: 0.2 dB Phase Imbalance: 8 degrees VSWR: 1.2:1 Port-to-port isol.: 22 dB, adjacent Temperature: -55C to +70C Size: 4.5” x 4” x 0.44” Noise Diode: NC302L Frequency : 10 Hz - 2 GHz Pdc : 6 – 8 6 mA Output ENR : 30 – 35 dB PSF: IMC ceramic Freq: MHz +/- 10 MHz I.L.: 3 dB VWSR: 1.75:1 Rejection: MHz, 32 dB min MHz, 30dB min Temp.: -30C to +40C LNA: Miteq AFSM2 Freq.: 1.0 – 2.0 GHz Gain: 25 dB +/- 1 dB NF: 0.8 dB VSWR: 1.5 GHz Pdc: 90mA (1.1 W) Temp.: -55C to +85C

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 7 STARLight STAR Light PDR – 3 October 2001 Test Plan/Procedure/Fixtures - Components: Procure selected components (LNAs, filters, power dividers) Design and fabricate test fixtures Assemble engineering test devices (Miteq and Ma/Com LNAs, PSF filters) Test components over temperature: -30C to +40C

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 8 STARLight STAR Light PDR – 3 October 2001 Test Plan/Procedure/Fixtures:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 9 STARLight STAR Light PDR – 3 October 2001 Test Plan/Procedure/Fixtures:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 10 STARLight STAR Light PDR – 3 October 2001 Test Results Summary - Components: Miteq LNA: Good NF (<0.7dB), burn-in is necessary, requested pricing/delivery info from vendor Ma/Com LNA: Linear gain vs. temperature curves, purchased fifty amplifiers for instrument built PSF Filters: Mounting and test fixture problems solved, very small filter-to-filter variation 8-way Power Dividers: Selected MECA power divider

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 11 STARLight STAR Light PDR – 3 October 2001 Test Results Summary - Components:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 12 STARLight STAR Light PDR – 3 October 2001 Test Results Summary - Components:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 13 STARLight STAR Light PDR – 3 October 2001 Test Results Summary - Components:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 14 STARLight STAR Light PDR – 3 October 2001 Test Results Summary - Components:

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 15 STARLight STAR Light PDR – 3 October 2001 Test Plan for 2-Channel Prototype Radiometer: Implement RF test ports in the receiver box Measure NF of RF front ends (switches, IRF, LNA) Measure S-parameters of RF front ends and gain block, at Troom and over operating temperature Test fringe-washing function over temperature

STARLight PDR 3 Oct ‘01 L. van Nieuwstadt Receiver - Page 16 STARLight STAR Light PDR – 3 October 2001