Analog Radio-over-Fiber (A-RoF) Modulating Direct Microwave Photonic Radar Pulses Over Glass

Direct optical modulation of high-frequency microwave radar waveforms, centralizing RF generation and reducing remote radio head complexity.

Direct Electro-Optic Mach-Zehnder Modulation

Instead of digitizing signals at the antenna, ISACSpine modulates 140 GHz sub-THz waves directly onto a 1550 nm laser carrier using high-bandwidth Mach-Zehnder optical modulators, transporting raw analog waveforms over fiber with zero ADC quantization loss.

Optical Heterodyning Sub-THz Generation

At the antenna mast, two optical wavelengths separated by 140 GHz mix on a high-speed uni-traveling-carrier photodiode (UTC-PD), generating pure millimeter-wave RF with sub-femtosecond phase jitter.

Direct analog radio-over-fiber transmission bypassing ADC/DAC stages
Optical heterodyning generating 140 GHz RF waves with ultra-low phase noise
Lightweight, passive remote radio head antennas consuming 80% less power
Ultra-clean radar pulses maximizing dynamic range and target contrast

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