This paper presents a 67-78 GHz 4-bit passive phase shifter using CMOS switches available in the 0.12 micrometer SiGe BiCMOS process (IBM 8HP). The phase shifter is based on a low-pass pi-network and CMOS passive transistors. The phase shifter achieves -19.2+/-3.7 dB of gain including pad loss at 77 GHz. The RMS phase error is less-than 11.25 deg and the RMS gain error is less-than 2.5 dB over the 67 78 GHz range. The total chip size is 450 x 300 micrometer 2 (0.135 mm2), excluding pads, and the chip consumes virtually no power. The measured P1dB is greater-than +8 dBm at 77 GHz and the simulated IIP3 is greater-than 22 dBm, making it possible to precede this design with a high gain LNA without loss of system linearity or input power handling.
A 4-bit passive phase shifter for automotive radar applications in 0.13 micrometer CMOS
2009
4 Seiten, 10 Quellen
Aufsatz (Konferenz)
Englisch
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