Title :
A 240GHz wideband QPSK transmitter in 65nm CMOS
Author :
Shinwon Kang ; Thyagarajan, Siva V. ; Niknejad, Ali M.
Author_Institution :
Berkeley Wireless Res. Center, Univ. of California at Berkeley, Berkeley, CA, USA
Abstract :
This paper demonstrates a 240GHz wideband QPSK transmitter in 65nm bulk CMOS. The proposed transmitter employs an 80GHz local oscillator, a quadrature differential hybrid, and a QPSK modulator. Additionally, an 80GHz class-E switching power amplifier is used to efficiently boost the phase-modulated wideband signal. A frequency tripler then regenerates the modulated signal at 240GHz while preserving the QPSK constellation. By using on-chip slotted loop antennas, the transmitter achieves an EIRP of 1dBm. A maximum data rate of 16Gbps is achieved with a total power consumption of 220mW.
Keywords :
CMOS analogue integrated circuits; frequency multipliers; loop antennas; millimetre wave antennas; millimetre wave power amplifiers; modulators; oscillators; quadrature phase shift keying; slot antennas; QPSK constellation; QPSK modulator; bit rate 16 Gbit/s; bulk CMOS; class-E switching power amplifier; frequency 240 GHz; frequency 80 GHz; frequency tripler; local oscillator; modulated signal; on-chip slotted loop antennas; phase-modulated wideband signal; power 220 mW; power consumption; quadrature differential hybrid; size 65 nm; wideband QPSK transmitter; Antenna measurements; CMOS integrated circuits; Frequency modulation; Phase shift keying; Power amplifiers; Transmitters; 240GHz; 80GHz LO; QPSK; class-E power amplifier; communication system; differential hybrid; frequency tripler; on-chip slotted loop antenna; sub-terahertz; transmitter; wideband;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2014 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4799-3862-9
DOI :
10.1109/RFIC.2014.6851740
