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
1Objective 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
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DC Power Summary
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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
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Test Plan/Procedure/Fixtures
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- 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
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Test Results Summary - Components
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Test Results Summary - Components
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Test Results Summary - Components
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Test Results Summary - Components
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- 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