PROJECT TITLE :

A -Band 48-Gbit/s 64-QAM/QPSK Direct-Conversion I/Q Transceiver Chipset

ABSTRACT:

This paper presents style and characterization of single-chip one hundred ten-one hundred seventy-GHz ( D-band) direct conversion in-phase/quadrature-section (I/Q) transmitter (TX) and receiver (RX) monolithic microwave integrated circuits (MMICs), realized in a very 250-nm indium phosphide (InP) double heterojunction bipolar transistor (DHBT) technology. The chipset is appropriate for low-power ultrahigh-speed wireless Communication and will be employed in each homodyne and heterodyne architectures. The TX consists of an I/Q modulator, a frequency tripler, and a broadband 3-stage power amplifier. It's single sideband (SSB) conversion gain of 25 dB and saturated output power of nine dBm. The RX includes an I/Q demodulator with D-band amplifier and ×3 multiplier chain at the LO port. The RX provides a conversion gain of 26 dB and has noise figure of 9 dB. A forty eight-Gbit/s direct quadrature phase-shift keying (QPSK) information transmission employing a 144-GHz millimeter-wave carrier signal is demonstrated with a small amount error rate (BER) of two.3 × 10 -three and energy potency of seven.forty four pJ/bit. An 18-Gbit/s 64-quadrature amplitude modulation (QAM) signal was transmitted in heterodyne mode with measured TX-to-RX error vector magnitude (EVM) of less than half-dozen.8% and spectrum efficiency of three.6 bit/s/Hz. The TX and RX have dc power consumption of 165 and 192 mW, respectively. The chip area of each TX and RX circuit is 1.3 × zero.9 mm2.