Multipath Polyphase Circuits and their Application to RF Transceivers

—Nonlinearity and time-variance in Radio Frequency (RF) circuits leads to unwanted harmonics and intermodulation products, e.g. in power amplifiers and mixers. This paper reviews a recently proposed multipath polyphase circuit technique which can cancel such harmonics and intermodulation products. This will be illustrated using a power upconverter IC as an example. The upconverter works from DC to 2.4 GHz, and the multipath polyphase technique cleans its spectrum up to the 17th harmonic, keeping unwanted spurious responses more than 40dB below the carrier. The technique can also be useful for other applications, and some possible applications will be discussed.

• Type: Conference
• Year: 2007
• Where: ISCAS
• Authors: Eric A. M. Klumperink, Rameswor Shrestha, Eisse Mensink, Gerard Wienk, Zhiyu Ru, Bram Nauta
• Keywords: Intermodulation Products, ISCAS 2007, Multipath Polyphase, Multipath Polyphase Circuit