Title :
A 44 GHz CMOS RFIC Dual-Function Attenuator with Band-Pass-Filter Response
Author :
Juseok Bae ; Cam Nguyen
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A dual-function attenuator possessing both attenuation and band-pass filtering functions is proposed. The new dual-function band-pass attenuator architecture is derived by replacing the quarter-wavelength transmission line of a conventional attenuator with a 2nd-order admittance-inverter band-pass filter. Design formulas for the dual-function band-pass attenuator are derived. A 3-b CMOS dual-function band-pass step attenuator designed using a 0.18 μm BiCMOS technology shows measured insertion loss of 4.4-5.9 dB, RMS amplitude error of 0.8-1.4 dB, RMS phase error of 1.9-6.7 ° over 36-52 GHz, input P1dB higher than 20 dBm at 44 GHz, and band-pass-filtering response with stop-band rejections greater than 18 dB at 24 and 64 GHz.
Keywords :
BiCMOS integrated circuits; attenuators; band-pass filters; field effect MIMIC; 2nd-order admittance-inverter band-pass filter; BiCMOS technology; CMOS RFIC dual-function attenuator; band-pass-filter response; dual-function band-pass attenuator; frequency 44 GHz; insertion loss; phase error; size 0.18 mum; Attenuation; Attenuators; Band-pass filters; CMOS integrated circuits; Loss measurement; Power transmission lines; Transmission line measurements; Attenuator; band-pass filter (BPF); multi-function circuits; radio frequency integrated circuit (RFIC);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2403574
