A 25 GHz active phase shifter using 10 bit Cartesian control
Sethi, Alok; Aikio, Janne P.; Akbar, Rehman; Hietanen, Mikko; Rahkonen, Timo; Pärssinen, Aarno (2020-05-13)
A. Sethi, J. P. Aikio, R. Akbar, M. Hietanen, T. Rahkonen and A. Pärssinen, "A 25 GHz Active Phase Shifter Using 10 bit Cartesian Control," 2020 2nd 6G Wireless Summit (6G SUMMIT), Levi, Finland, 2020, pp. 1-5, doi: 10.1109/6GSUMMIT49458.2020.9083742
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https://urn.fi/URN:NBN:fi-fe2020070646922
Tiivistelmä
Abstract
This paper presents an active RF phase shifter, targeted towards 5G wireless systems, which uses an IQ vector modulator (IQVM) topology with a 10 bit cartesian codebook. The circuit is designed using 45 nm CMOS SOI technology. To generate the I and Q basis vectors for the IQVM, a tunable polyphase filter with a novel tuning mechanism is used, which allows operation over an octave of a frequency range, from 22 GHz to 40 GHz. The RF bandwidth of the proposed phase shifter is 2.5 GHz and can provide in excess of 8 dB of fine gain control over 360 degrees of phase shift. Active area occupied is 0.2 square millimeter. The total DC power consumed from 1 V supply is 36 mW.
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