RF Transceivers For Mobile WiMAX Applications

Analog Devices has introduced RF-to-digital baseband transceivers designed to enable the IEEE 802.16d/e mobile WiMAX (Worldwide Interoperability for Microwave Access) standard for mobile communications devices, such as cell phones, personal digital assistants (PDAs), and handheld multimedia devices.

According to the release, building on ADI’s AD9352 and AD9353 family of integrated WiMAX transceivers, the AD9354 and AD9355 consume less power than other transceivers in their class and are available in a 20% smaller package, while adding an additional receiver path for multiple-input multiple-output (MIMO) support. By integrating ADCs, DACs and real-time control and calibration loops, the transceivers enable designers to eliminate analog and RF functionality from their baseband processors.

The AD9354 and AD9355 transceivers integrate two direct-conversion receivers that provide support for MIMO technology, which ensures mobile devices achieve uninterrupted WiMAX service. The transceivers communicate with a WiMAX terminal’s baseband ASIC or FPGA using the industry standard JESD207 digital interface that Analog Devices helped to define.

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“By including on-chip data conversion and adding a second receiver signal chain to our transceiver architecture, Analog Devices is helping communications service providers extend WiMAX into the mobile marketplace,” said Thomas Gratzek, business director, Analog Devices. “The AD9354 and AD9355 cover the key WiMAX frequency bands and are ideally suited for the small form factors in development.”