Maxim - Tiny WiMAX Transceiver Improves SNR by 10dB

Using a dual-receiver architecture to mitigate RF channel fading by as much as 10dB compared to a single-receiver architecture, the transceiver maximizes data throughput in nomadic and mobile WiMAX subscriber applications such as notebook computers, express/PC cards, USB dongles, smartphones, and in-home desktop CPE modems. The MAX2839AS is ideal for mobile WiMAX, Korean WiBro(TM), and other OFDM-based wireless broadband systems.

Designed using Maxim's high-performance SiGe BiCMOS process, the MAX2839AS provides the industry's best receiver noise performance. Both receivers feature the industry's lowest noise figure at 2.3dB, -81dBm sensitivity for a 64-QAM signal at a 5MHz channel bandwidth, and a 95dB gain control range that is digitally controlled in 1dB steps. Each device is factory calibrated to achieve better than -35dB EVM, -45dBc of sideband suppression, and carrier leakage of -40dBc.

The transmitter features a 62dB gain control range, digitally controlled in 1dB steps. It delivers a 0dBm linear output with a 64-QAM signal, greater than -45dBc of sideband suppression, and more than -36dB EVM, while meeting a -70dBr spectral mask.