A One-Half Square Inch UMTS Base Station Receiver Module

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  • Author: Douglas Stuetzle and Todd Nelson
How much integration is possible while still meeting macrocell base station performance requirements? Process technology still dictates that certain key functions are made in specific processes: GaAs and SiGe are best for the RF realm, fine-line CMOS for high-speed ADCs, and high-Q filters cannot be implemented well in semiconductor materials. Yet the market demands more density. The following article presents a design analysis for two µModule® products: the LTM9004 implementing a direct conversion receiver, and the LTM9005 implementing an IF-sampling receiver.