Si-based 60GHz 2X Subharmonic Mixer for Multi-Gigabit Wireless Personal Area Network Application

This paper presents the design and development of a 60GHz 2times passive subharmonic mixer in a silicon-germanium (SiGe) process. Wide bandwidth operation of the mixer is indispensable for the integration of a low power wireless front-end at 59-64GHz license-free frequency band for the direct up and down conversion of multi-gigabit digital data. An anti-parallel diode pair (APDP) has been incorporated to generate the non-linearity and the ground shielded coplanar transmission lines as well as a coupled microstrip section realizes the necessary impedance matching conditions. The mixer has a measured minimum down-conversion loss of 8.3dB with a greater than 4GHz of single-sided 3-dB baseband bandwidth with a 5.5dBm local oscillator signal at 30.5GHz. An input 1dB compression point of -7dBm has been recorded. This is the first report of a 60GHz subharmonic mixer in SiGe processes that can be applicable to multi-gigabit wireless personal area network application

[1]  G.M. Rebeiz,et al.  A 77 GHz SiGe sub-harmonic balanced mixer , 2005, IEEE Journal of Solid-State Circuits.

[2]  R.W. Brodersen,et al.  A 60-GHz down-converting CMOS single-gate mixer , 2005, 2005 IEEE Radio Frequency integrated Circuits (RFIC) Symposium - Digest of Papers.

[3]  J. Laskar,et al.  A low-power ka-band Voltage-controlled oscillator implemented in 200-GHz SiGe HBT technology , 2005, IEEE Transactions on Microwave Theory and Techniques.

[4]  B. Gaucher,et al.  SiGe bipolar transceiver circuits operating at 60 GHz , 2005, IEEE Journal of Solid-State Circuits.

[5]  J. Cressler.  SiGe HBT technology: a new contender for Si-based RF and microwave circuit applications , 1998 .

[6]  J. E. Degenford,et al.  Harmonic Mixing with an Anti-Parallel Diode Pair , 1974 .

[7]  S.K. Reynolds,et al.  A 60-GHz superheterodyne downconversion mixer in silicon-germanium bipolar technology , 2004, IEEE Journal of Solid-State Circuits.

[8]  K. Hettak,et al.  A novel uniplanar 44 GHz MMIC subharmonic mixer using CPW series stubs , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[9]  F. Pourchon,et al.  A 40 GHz single-ended down-conversion mixer in 0.13 /spl mu/m SiGeC BiCMOS HBT , 2005, IEEE Microwave and Wireless Components Letters.

[10]  Sanjay Raman,et al.  A 60-GHz uniplanar MMIC 4/spl times/ subharmonic mixer , 2002 .