Stephen Sabbagh Email & Phone Number

Farmingdale Ny

System architecture.Mixed Signal MW/Digital design for the active tile board for an AESA RADAR utilizing multilayer PC Board technology including active and passive X-Band RF/MW components including amplifiers, phase shifters, variable gain amplifiers, corporate feed networks, RF interposer's, and digital control signals. Several mixed signal beamformer designs for X-Band AESA RADAR configurations utilizing multilayer PC Board technology including TDU's (Time delay units), power dividers (2 way and 3 way isolated), amplifiers and RF switches.Support engineering to vendors regarding new TWTA designs for legacy Telephonics RADAR's.Support engineering to vendor in solving issues including excessive integrated phase noise issues on receiver exciter designs, excessive spurious on arbitrary waveform generators and issues involving T/R limiter failures.Cognizant engineer for the APS-153 transmit chain. Responsibilities included chain analysis, with an emphasis on balancing transmit spectrum vs time domain response. Utilized an arbitrary waveform generator to pre-distort the transmit waveform to calibrate out system phase distortion resulting in greatly enhanced time domain response.

Farmingdale Ny

Design of microwave integrated assemblies including X-Band transmitter drives, phase/amplitude matched amplifiers for phased arrays (.5 - 1 GHz,, 1 -2 GHz, 2-4 GHz), amplitude modules for RADAR Simulators (2-18 Ghz with switched harmonic filtering), Vector Modulators (2-18 GHz), phase invariant attenuators, upconverters/ downconverters, filters, SSB modulators, high power switches/ attenuators.

Hauppauge Ny

Designed various high power RF amplifier modules and systems utilizing these modules for the following bands (490 MHz-1090 MHz , 850 MHz-1600 MHz, 100 MHz-500 MHz, 2-30 MHz). Designed a high linearityVHF amplifier utilizing pre-distortion techniques.Cognizant engineer for the DASA 490MHz-1090 MHz high power jammer amplifier 5KW CW into a 3:1 VSWR mismatch.

Ronkonkoa Ny

Design of various amplifiers designed for EMC testing including 100MHz-500Mhz 1KW, 500 MHz-1000 MHz 1 KW, 80 MHz-1000 MHz 250 Watt amplifiers. First 1 KW solid state amplifier designs for IFI. Design of first IFI TWT amplifiers.