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Bob Alman acts as an extension of your engineering team by providing guidance, application expertise and solutions
About Bob Alman
Co-Founder, co-owner and CTO of SenarioTek, LLC
Best-In-Class RF and microwave switch matrix design for over 11 years with over 400 custom designs
Designed satellite payload test system signal routing and conditioning systems
Original designer of Thermal vacuum compatible switch matrixes for Ka band applications
Designer of Error and power Tracking methodology, resulting in 0.1dB system accuracy at 32GHz Designer of Agilent technologies N1810XX, N1811XX and N1812XX electromechanical switches
Designer of 10MHz-67GHz Solid State switch for Agilent PNA
Designer of patented 8765X coaxial switch; the first 5 million cycle microwave switch
Designer of 87104X-87106X 26.5 GHz multiport electromechanical switches, still considered by the industry as best-in-class for RF performance
Designer of 87222X, Agilent 50 GHz transfer switch. Still unique in industry for the performance
Designer of 87607B matrix switch, unique design for ease of use and functionality
Design Services
VNA Test Sets
RF and Microwave switch Matrix design
Signal Conditioning
Calibration Modules
Satellite Test Applications
Microwave STE
Design consulting, fully documented design-to-print solutions
First article test and evaluation
reverse engineering/upgrade services.
Targeted Applications
• Radar / EW / Radio Comms
o T/R Module Test
o Avionics Communications Test
o Antenna Test
• Satellite Test
o Satellite Payload Test Systems
o Space Qualified Component Test
o Ground Station Test Systems
• Wireless / Telecom Test
o ATE Solutions & Calibration
o Network Analyzer Test Sets
o High Frequency Amplifier Testing
o RF & Uwave Calibration Modules
Design Offerings
• Standard and custom signal routing solutions
• Phase-matching (radar, antennas..)
• Delay-matching (balanced measurements)
• Millimeter wave solutions
Switch Matrices
• Switch matrices and sub-systems
• Signal conditioning
• Phase-matching (radar, antennas..)
• Delay-matching (balanced measurements)
• Mixed impedance sub-systems
• High power amplifier testing
• Millimeter wave solutions
Example of a solid state switch matrix that maintains ± 5⁰ phase matching at 2.5 GHz across 128 paths (HSS delay matches to 2ps).
Signal Routing & Conditioning
• Add filtering, amplification, impairments,…
• Mixed-impedance subsystems (75 Ω, 50 Ω,
waveguide, optical)
• Amplifier testing
• Remote calibration correction
Signal Routing & Conditioning
Precision Error Correction
• Amplitude only correction technique • Beneficial to satellite applications • Unlimited distance • Remote power detection • Bandwidths up to 50 GHz • Compatible with TVAC • High Noise immunity • High accuracy • Electromechanical and solid state switching and
attenuation • Amplifiers, directional detectors, couplers, mixers, filters • Control devices such as serial and parallel I/O, I2C busses • Precision temperature and voltage monitoring devices
Components Include:
Calibration Fixtures/Modules
• Automated system calibration • Custom enclosure/configuration • Inline calibration • Thermal vacuum calibration • Customize test
o Signal conditioning o Harmonics
• Frequencies up to 32 GHz • Multiport • Signal routing • Calibration standards • Power sensors • Noise sources • Phase matching • Amplifiers • Filters • Attenuators • Couplers
Capabilities Including:
Key Advantages:
Thermal Vacuum Solutions
• DC to 32 GHz • Operation from -30⁰ C to +70⁰ C • <10-6 Torr vacuum • VSWR 2:1 • 3 dB Insertion loss • 70 dB Isolation • >10W Power levels • ± 0.5 dB Repeatability • ± 0.1⁰ Temperature monitoring • ± 0.1 dB Power uncertainty monitoring
• Switch matrices • Amplification • Frequency conversion • Power detection • Directional power detection
• Fiber optic (including power over fiber) • Precision Temperature / Voltage monitoring
Maintain Performance:
Capabilities Include:
• Switched attenuation • Filtering • Switch cycle count • Position telemetry • LAN control
Thermal Vacuum Solutions
Satellite Payload & Component Test
• Ethernet controller designed specifically for RF/ microwave components • Switch counter • Position read back • Switch rules • Logical switch control • SCPI over LAN • Front panel control/ LED indicators
• Qualified RF TVAC compatible subsystems for inside thermal chambers conversion inside thermal chambers • Eliminate most RF and DC cable penetrations through the TVAC chamber • Daisy-chain unlimited number of switch matrices inside the chamber • Use same test solution inside and outside of chamber
Easy Control Via Ethernet:
Automated RF Semiconductor Test
• Automate system calibration • Customize test fixturing
o Signal conditioning o Harmonics
• Variety of form factors o Load boards o Virginia panels o Custom configurations
• Frequencies up to 40 GHz • Multiport • Signal routing • Calibration standards • Power sensors • Noise sources • Phase matching • Amplifiers • Filters • Attenuators • Couplers
Capabilities Including:
Key Advantages: