Analysis of a Weaver, Hartley and Saw- Filter Based, Image RejectudArchitectures for Radio Receiver Design

摘要

This paper presents an analysis of the three popular image reject architectures used inudradio receiver design. The SAW-filter based image reject architecture is the simplest to implementudand has the lowest power consumption while the weaver is the most complex with the highestudpower consumption. The Hartley architecture which utilizes half the number of mixers used in theudweaver architecture does not consume as much as the weaver architecture but is not as efficient dueudto the use of the 900 phase shifter. The three architectures are optimized for various designudspecifications. The receiver design with power constraints is better realized using the SAW filterudwhile the receiver with portability as its highest priority is better realized using the weaverudarchitecture. The architecture implemented for any particular radio design is determined by theudreceiver specification with the highest priority