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The consumer electronics in past decades used for tracking and navigation systems like GPS, GLONASS, Galileo, BeiDou or QZSS used signals of the L1 frequency band, which provides positioning accuracy about 5 – 10 meters. With the maturity of positioning technology, modern GNSS receivers have added another band at lower frequencies, such as L5 and E6. Having GNSS signals in multiple frequency bands, including high and low frequencies, helps to eliminate ionospheric errors, improve multi-path effects, reduce interference in narrow frequency bands as well as achieve sub-meter positioning accuracy.
Standard antennas for dual frequency navigation consists of two single-band patch antennas stacked together. Such design comes with a relatively higher cost, larger size and a less stable performance.
In response to the above problems, Unictron has developed an innovative dual-frequency high-precision positioning antenna, which got a nickname “Castle” patch.
Unictron is engaged in R&D and manufacturing of antenna-solutions, piezo ceramics, ultrasonic transducers and circuit protection products.