Chip makers are putting together designs for handset transceivers that can handle all four GSM bands, but few are showing enthusiasm for the idea of a true quad-band phone. The fourth band comes from ...
output power of 35.2 dBm and a power efficiency of 53% with an input power of –1 dBm. Typical performance for the high band is an output power of 33.8 dBm and a power-added efficiency of 44% with an ...
NEC returns to the American cellphone market with their new 515 High Definition Mobile handset, which is the world’s first quad-band GSM phone. The 515 also has a large 64,000 color display and ...
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