A 12.5-Gb/s Pulse Modulator with 6.5-ps FWHM Using 0.1-μm InP HEMTs for Ultra-Wideband Impulse Radio Communications

Abstract

We developed an ON/OFF pulse modulator IC using 0.1-μm-gate-length InP HEMTs for ultra-wideband impulse radio (UWB-IR) communications systems. The IC generated extremely short pulses whose full width at half maximum (FWHM) were 6.5 ps. Furthermore, our new circuit architecture that retimes output pulses at both rising and falling edges made the IC robust against timing fluctuations or jitter. The output pulses had very small jitters of 256 fs rms and 1.3 ps p-p and thus had little degradation from intersymbol interference (ISI) when a 2 31 -1 length pseudo random bit stream (PRBS) at a bit rate of 12.5 Gb/s was input. The pulse modulator can be used to construct an ON/OFF keying transmitter based on UWB-IR architecture that sends more than 10 Gb/s of data in the W-band (75-110 GHz) and above.

Picosecond Pulse Generators in InP-Based High Electron Mobility Transistor Technology for 10 Gbps Wireless Communication

“…5) In this paper, two types of PGs are presented: A PG with 75 nm InP-based HEMT technology (Type-I) generates extremely short pulses having an FWHM of less than 4.9 ps at a bit rate of 20 Gbps. 14) To the best of our knowledge, the undeconvolved FWHM is a record for PGs using semiconductor transistors, 15) and is as small as that from PGs using NLTLs with SBDs. 9) The Type-II PG using 100 nm InP-based HEMTs functions as an ON/OFF pulse modulator (PM) for millimeter-wave IR systems.…”

“…Thus, the IC showed little degradation from ISI when a 2 31 À 1 pseudorandom bit stream (PRBS) at 12.5 Gbps was input. 15) The result indicated the realization of the first IR transmitter that sends data of more than 10 Gbps in the W-band frequencies.…”

An 85 GHz Distributed Amplifier with 15.5 dBm Output Saturated Power Using 0.1 µm InP-based High Electron Mobility Transistors

“…1. [6][7][8] The transmitter requires no oscillator or mixer as required in earlier millimeter-band transmitters, resulting in a much smaller millimeter-band transmitter. The transmitter can be constructed using only two active components: a pulse generator (PG) and a power amplifier (PA).…”