The RF in RFID: Passive UHF RFID in Practice

The Design of CMOS Radio-Frequency Integrated Circuits, Thomas Lee, Cambridge, 1998: An encyclopedic introduction to the design of radio components, though the emphasis is much broader than purely CMOS implementation (which was probably added to the title to increase sales). Includes treatments of synthesizer operation, oscillator phase noise, and feedback design.
"Delta-Sigma Data Conversion in Wireless Transceivers", lan Gallon, IEEE Transactions on Microwave Theory and Techniques, Volume 50, #1, p. 302 ( 2002)
"Analog-to-digital converter survey and analysis", R. Walden, IEEE Journal on Selected Areas in Communications, Volume 17 #4, p. 539 ( 1999)
RF Power Amplifiers for Wireless Communications, Steve C. Cripps, Artech House, 1999: Cripps is bright, opinionated, and brings extensive practical experience to bear on abstruse topics in amplifier design.
Design of Amplifiers and Oscillators by the S-Parameter Method, George Vendelin, Wiley Interscience, 1982: purely microwave-oriented, antedating modern CMOS and SiGe devices, but a useful reference and introduction to matching techniques, low-noise and broadband design.
"A Fully Integrated Integrated 1.9-GHz CMOS Low-Noise Amplifier", C. Kim et. al., IEEE Microwave and Guided Wave Letters, Volume 8, #8, p. 293 ( 1998)
"On the Use of Multitone Techniques for Assessing RF Component's Intermodulation Distortion", J. Pedro and N. de Carvalho, IEEE Transactions on Microwave Theory and Techniques, Volume 47, p. 2393 ( 1999)
"Weigh Amplifier Dynamic-Range Requirements", D. Dobkin (that's me!), Walter Strifler and Gleb Klimovitch, Microwaves and...