Millimeter-Wave Ultra-Wideband Six-Port Receiver Using Cross-Polarized Antennas

Nazih Khaddaj Mallat,Ke Wu,Serioja O Tatu,Emilia Moldovan

doi:10.1155/2009/508678

Abstract

This paper presents a new low-cost millimeter-wave ultra-wideband (UWB) transceiver architecture operating over V-band from 60 to 64 GHz. Since the local oscillator (LO) power required in the operation of six-port receiver is generally low (compared to conventional one using diode mixers), the carrier recovery or LO synchronization is avoided by using second transmission path and cross-polarized antennas. The six-port model used in system simulation is based on -parameters measurements of a rectangular waveguide hybrid coupler. The receiver architecture is validated by comparisons between transmitter and receiver bit sequences and bit error rate results of 500 Mb/s pseudorandom QPSK signal.

Highlights

Due to a rapid growth of high-speed wireless technologies, new wireless systems at home and corporate environment are expected to emerge in the near future
We tried to get close as much as we can to the realistic properties of each component
We have considered a polarization loss factor (PLF) factor for the antennas, six-port based on coupler measurements results, amplifiers with acceptable gains, and the diodes spice models for the power detectors

Summary

Introduction

Due to a rapid growth of high-speed wireless technologies, new wireless systems at home and corporate environment are expected to emerge in the near future This increasing interest for ultra-high-speed wireless connectivity has pushed the Federal Communications Commission (FCC) to provide new opportunities for unlicensed spectrum usage with fewer restrictions on radio parameters. Because of the power spectral density limitations (−41 dBm/MHz), the microwave UWB overlays existing wireless services (GPS, PCS, Bluetooth, and IEEE 802.11 WLANs) without significant interferences. Compared to this low-frequency range UWB technology, 60 GHz millimeter-wave communications will operate in the currently unlicensed spectrum (57–64 GHz), where the oxygen absorption limits a long-distance interference [1–6]. A communication link has been simulated using a 500 Mb/s quadrature phase shift keying (QPSK) modulated signal

Six-Port Proposed Model

New Six-Port Receiver Architecture

Demodulation Results

Conclusion