Multiband PIC I/Q Demodulator for GNSS Anti-Jamming

The patent replaces traditional electronic signal processing with photonic processing. The optical demodulator uses optical fields to process RF signals, converting them to optical domain for demodulation and then back to electrical domain. This substitution of electronic systems with photonic systems achieves anti-jamming capabilities while reducing device weight and power consumption, as photonic components can be integrated on compact chips with lower power requirements compared to traditional electronic anti-jamming systems.

The patent introduces an optical field as an intermediary medium between RF signal input and electrical output. The RF signal is first converted to optical domain, processed through optical components (modulators, demodulators, phase shifters) that provide inherent electrical isolation, and then converted back to electrical domain. This intermediary optical processing stage achieves superior electrical isolation and anti-jamming performance while the integrated photonic circuit architecture manages the complexity through systematic design.

The patent merges multiple optical components (modulators, demodulators, phase shifters, waveguides) onto a single integrated photonic circuit chip. This integration consolidates what would otherwise be separate discrete components requiring precise alignment into a unified structure where components are fabricated together using standard photonic manufacturing processes. The multiband capability is achieved through integrated optical filters and resonators designed at the fabrication stage, reducing assembly complexity and alignment requirements while minimizing overall device volume.