A Switchless CMOS Bi-Directional Distributed Gain Amplifier With Multi-Octave Bandwidth

This letter proposes a wideband switchless bi-directional distributed amplifier in a commercial 0.13 μm CMOS technology, which realizes multi-octave bandwidth with high gain and low noise figure using distributed amplifier technique and cascode-amplifier pair. The measured gain is over 10 dB and measured noise figure is 3.2-6.5 dB. The input and output return losses are better than 9 dB at 3-20 GHz. The measured output P1dB and OIP3 are larger than 8 dBm and 17 dBm at 4-15 GHz. The chip size is 0.96 × 0.85 mm2 including pads. The proposed switchless bi-directional amplifier has almost the same chip size compared to the conventional uni-directional distributed amplifier. The dc power consumption is around 68 mW at 1.5 V supply voltage. Nearly identical RF performances are achieved in the forward and the backward operations due to the symmetric circuit topology and layout.

[1]  Moon-Kyu Cho,et al.  Compact X-band CMOS bidirectional gain amplifier without T/R switches , 2013 .

[2]  R. Lai,et al.  Compact ka-band bi-directional amplifier for low-cost electronic scanning array antenna , 2004, IEEE Journal of Solid-State Circuits.

[3]  Sanghoon Sim,et al.  A Compact X-Band Bi-Directional Phased-Array T/R Chipset in 0.13 $\mu{\hbox {m}}$ CMOS Technology , 2013, IEEE Transactions on Microwave Theory and Techniques.

[4]  H. Shigematsu,et al.  GaN single-chip transceiver frontend MMIC for X-band applications , 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.

[5]  M. Ruberto,et al.  A CMOS Bidirectional 32-Element Phased-Array Transceiver at 60 GHz With LTCC Antenna , 2012, IEEE Transactions on Microwave Theory and Techniques.

[6]  Gabriel M. Rebeiz,et al.  Single and Four-Element $Ka$-Band Transmit/Receive Phased-Array Silicon RFICs With 5-bit Amplitude and Phase Control , 2009, IEEE Transactions on Microwave Theory and Techniques.

[7]  Joohwa Kim,et al.  A Switchless, Q-Band Bidirectional Transceiver in 0.12-µm SiGe BiCMOS Technology , 2012, IEEE J. Solid State Circuits.

[8]  Wai-Kei Lo,et al.  Self-phase equalised bidirectional distributed amplifier , 2007 .

[9]  Shmuel Ravid,et al.  A Bidirectional TX/RX Four-Element Phased Array at 60 GHz With RF-IF Conversion Block in 90-nm CMOS Process , 2010, IEEE Transactions on Microwave Theory and Techniques.

[10]  Joohwa Kim,et al.  A 77-GHz to 90-GHz bidirectional amplifier for half-duplex front-ends , 2010, IEEE Custom Integrated Circuits Conference 2010.