ultra–wideband rf/fpga rapid prototyping platform · ultra–wideband rf/fpga rapid prototyping...
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Ultra–wideband RF/FPGA rapid prototyping platform
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Concept
It is not only quality, but also time to market, that matters to our business partners.
To meet their challenging needs, we have developed generic hardware, along withsoftware blocks needed in typical radio frequency digital signal processing.
Thanks to that we can develop and test prototypes swiftly, prior to the tailoredhardware platform design.
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Possible applications
Possible applications of the platform:
Radar (PESA, FMCW)
Real–time spectrum analyzer with no gaps in time and thus no missed events
Powerful vector signal generator and analyzer
5G signal analysis; and many other
Get in touch with our R&D department via [email protected] to discuss how we cansolve your RF problem.
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Analog subsystem features
The key features of the analog system:
Ultra–wideband operation (several MHz up to 6GHz with no externalcomponents)
Powerful local oscillators, supporting fast frequency hopping or linear frequencysweeping (chirping)
Embedded 1W output amplifiers
Switched filters for operation in common RF bands
Advanced clock generation and distribution (all components are fullysynchronized)
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Analog subsystem schematic
LNA VGA
400MHz-6GHz I
Q
0.4-6GHzLO
2.4-2.5GHzCHIRP
5.7-5.9GHzCHIRP
ADC
ADC
ADC
ADC
125 MSPS / 14-bit
10MHz-6GHz
10MHz-6GHzLO
0.3-500MHz
ADC
ADC
250 MSPS / 12-bit
5MHz-1GHz
I
QDAC
DAC
375 MSPS / 16-bitVGA1W PA
100MHz-6GHz
EXT LOOUT
EXT DACOUT
1W PA
5MHz-2.5GHz
DAC1.3 GSPS / 14-bit2.6 GSPS IN MIX-MODE
VGA
LNA
LNA
VGA
VGA
VGA
VGA
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Digital subsystem features
The digital subsystem includes:
FPGA and dual–core ARM (5CSEMA5F31I7N)
2GB DDR3 SDRAM + ECC
Embedded 64GB SSD for data storage
Gigabit Ethernet
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Digital subsystem features
The digital subsystem includes:
1024x768px VGA video output
digital audio in/out
CAN, RS485, RS232
MEMS gyroscope/accelerometer
Stereo camera interface
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Other features
Our bespoke Linux OS. No power–down caused filesystem errors, etc.
Graphic user interface supporting input devices such as USB keyboard, mouseand touchscreen.
Low-noise, spread-spectrum power supplies.
Industrial temperature range components only (−40◦C to 85
◦C)Variety of expansion interfaces allowing control of extension boards, e.g.:
higher frequency up/down conversionsignal multiplexing, conditioning and measurementphased array antennas
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Example application #1 � persistence spectrum analyzer
The analyzer works in the 2.4–2.5GHz band and includes:Analog downconversion and IQ demodulation.125MSPS IQ signal sampling.14 FFTs working in parallel with overlapping sampling windows, i.e.no processing gaps in time and thus no missed events.
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Example application #1 � persistence spectrum analyzer
Each of the 14 FFTs utilizes:1024 points frequency resolution100MHz calculation clockPipelined architectureFour 27x27 bit multipliers performing operation in every clock cycleIn place operation (no double memory used)16-bit, pipelined sin/cos DDS
AMPLITUDE
TIME
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
SAMPLING
FFT CALCULATION
FFT CALCULATION
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Example application #2 � frequency modulated radar
Operates in 2.45GHz or 5.8GHz band (S-band or C-band).Performs high-precision, 4096 points FFT on each pulse.Pulse–synchronized scope–plots and FFT results are displayed.Spurious spectrum is measured before each pulse and filtered out from thereceived signal.
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Example application #2 � 5.8GHz phased array antenna
The antenna utilizes wideband Vivaldi type elements.
The field is circularily polarized.
The beam can be electronically steered by using phase shift.
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Example application #2 � 5.8GHz microwave lens
The lens is mathematically described and optimized in the R language.
The FEM simulations were used to verify performance.
Iteratively, the mathematical optimization was corrected with the FEM results toachieve best performance.
We have found that much different designs should be tailored to operate in the TXand RX modes.
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Example application #2 � 5.8GHz TX lens
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Example application #2 � 5.8GHz RX lens
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