Distributed Radar Antenna Layout for Accurate Time Synchronization

The patent applies preliminary action by pre-calculating and storing the relationship between cable lengths and transmission delays in a lookup table before actual operation. When a far-end antenna is selected, the corresponding cable delay is retrieved from the table and used to adjust the transmission timing, ensuring time synchronization is achieved in advance rather than calculated in real-time during signal processing

The patent changes the parameter of cable length to optimize delay estimation accuracy. By setting the cable length to satisfy a specific relationship with the spatial distance (L1/L2 > Δx1/Δx2), the system enables accurate separation of cable delay from spatial delay through phase difference measurements at multiple frequencies, thereby resolving the time synchronization issue while maintaining angular resolution benefits

The patent transforms the cable length parameter from an arbitrary value to one that satisfies a specific mathematical relationship with spatial distance (L1/L2 > Δx1/Δx2). This parameter change enables the phase difference measurement method to successfully separate cable delay from spatial delay, achieving accurate delay estimation while maintaining the practical flexibility of different cable lengths for distributed antenna connections

The patent replaces direct physical measurement of transmission delay with a phase difference measurement method using multiple frequencies. Instead of mechanically measuring cable delays, the system uses electromagnetic phase measurements at different frequencies to calculate and separate cable delay components, achieving higher precision through field measurement rather than physical measurement