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 - PowerPoint PPT Presentation

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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

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STARLight PDR 3 Oct 01 L. van Nieuwstadt Receiver - Page 1. STARLight. Objective. To design, build and test RF front end ... Design and fabricate test fixtures ... – PowerPoint PPT presentation

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Title: 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


1
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 Nieuwstadt734-615-2252,
linevn_at_umich.edu
2
  • STAR Light PDR 3 October 2001
  • Outline
  • Requirements Noise Budget
  • Block Diagram
  • Component Selection and Trade-offs
  • Component Testing and Summary
  • Test plan for 2-channel propotype

3
  • STAR Light PDR 3 October 2001

Requirements (from Noise Budget) Frequency
1.4135 GHz /- 10MHz NF 2.5 dB
Gain 90 dB Pdc lt 8.5 Watts
Size 5 x 5 x 1.5 (12.5 cm x 12.5 cm x
4cm) Weight lt 300 gr. Temp 30C
to 40C (operating)
4
  • STAR Light PDR 3 October 2001

5
  • STAR Light PDR 3 October 2001

DC Power Summary
6
  • STAR Light PDR 3 October 2001

Selected parts specs
LNA Miteq AFSM2 Freq. 1.0 2.0 GHz Gain 25
dB /- 1 dB NF 0.8 dB VSWR 1.41 _at_ 1.5
GHz Pdc 12V _at_ 90mA (1.1 W) Temp. -55C to 85C
AMP MAAM 12000-A1 Freq. 1.2 1.75 GHz Gain
26 dB /- 0.8 dB NF 1.35 dB VSWR 1.41 P1dB
14 dBm Pdc 5V _at_ 85mA (0.43 W) Temp. -55C to
125C
PSF IMC 930307 ceramic Freq 1413.5 MHz /- 10
MHz I.L. 3 dB VWSR 1.751 Rejection 1393.5
MHz, 32 dB min. 1433.5 MHz, 30dB min Temp.
-30C to 40C
Power Divider MECA 808-2-1.400 Frequency 0.8
- 2 GHz Insertion Loss 0.8 dB (above 9
dB) Ampl. Imbalance 0.2 dB Phase Imbalance 8
degrees VSWR 1.21 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 V _at_ 6 mA Output ENR 30
35 dB
7
  • 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

8
  • STAR Light PDR 3 October 2001

Test Plan/Procedure/Fixtures
9
  • STAR Light PDR 3 October 2001

Test Plan/Procedure/Fixtures
10
  • STAR Light PDR 3 October 2001
  • Test Results Summary - Components
  • Miteq LNA Good NF (lt0.7dB), 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

11
  • STAR Light PDR 3 October 2001

Test Results Summary - Components
12
  • STAR Light PDR 3 October 2001

Test Results Summary - Components
13
  • STAR Light PDR 3 October 2001

Test Results Summary - Components
14
  • STAR Light PDR 3 October 2001

Test Results Summary - Components
15
  • 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

16
  • STAR Light PDR 3 October 2001
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