CDMA BC5 (450 MHz)
The CDMA BC5 (450 MHz) frequency band is a cellular frequency designated for the operation of cdmaOne and CDMA2000 mobile phones and other mobile devices. This band operates at a frequency range of 410-483 MHz for the uplink and 420-493 MHz for the downlink, with a duplex spacing of 10 MHz.
This band is particularly noted for its low frequency, which allows for better coverage with fewer base stations compared to higher frequency bands. For instance, in Sweden, only 350 base stations were needed to cover the entire country using the 450 MHz band, compared to 7,500 base stations required for 50% coverage using the 2 GHz band.
The 450 MHz band has been used in various countries, including China, Russia, and Brazil, for CDMA networks. However, it has also faced competition from GSM and 3G networks, particularly in regions where GSM technology was more established. The band is also used by military agencies for radar applications, including land-based, shipborne, and airborne systems, due to its suitability for long-range radar operations.
