To meet the needs of dual-band antennas, antenna manufacturers usually stack two single-band panel antennas to meet the requirements of high-precision positioning antennas. However, Unictron Technology has innovatively developed a dual-frequency high-precision positioning antenna, which is called the “Castle Patch Antenna”. It takes its name from the appearance of a medieval castle building. The Castle patch antenna adopts a neat single-layer design. Its most significant advantage lies in its flat structure. Compared with the current stacking process in the mainstream market, castle is a monolithic design, which shows the unique and innovative technology that Unictron has. Stacked needs two layers of different substrates to create dual frequency, however, castle only uses one substrate to meet two frequencies.