C. Hannachi

Complete characterization of novel MHMICs for v-band communication systems

This paper presents the characterization results of several new passive millimeter wave circuits integrated on very thin ceramic substrate. The work is focused on the design and characterization of a novel rounded Wilkinson power divider, a 90° hybrid coupler, a rat-race coupler, and a novel six-port (multiport) circuit. Measurements show the wideband characteristics, allowing therefore their use for multi-Gb/s V-band wireless communication systems.

V-band six-port quadrature demodulator : Error Vector Magnitude analysis

Direct conversion quadrature demodulator analysis based on recently fabricated V-band six-port circuit operating over 60 GHz band is presented in this paper. In order to obtain realistic system simulation results, the computer model of the six-port demodulator is implemented using Advanced Design System (ADS) software and S-parameter measurements of the integrated six-port circuit on thin alumina substrate. The performance of the proposed model is characterized in terms of the Error Vector Magnitude (EVM) for various M-PSK/M-QAM modulated signals. Very good demodulation results have been obtained over a 5 GHz band, from 60 to 65 GHz. These results provide further evidence that the six-port quadrature demodulator is a successful approach for homodyne or heterodyne transceivers designed for high-speed short-range wireless communication systems, such as todays WiGig or future millimeter wave 5G.

An improved-performance V-band six-port receiver for future 5G short-range wireless communications

Performance analysis of a millimeter-wave direct conversion receiver (homodyne), based on the measurement results of recently fabricated V-band six-port circuit, is presented in this paper. In order to obtain realistic and accurate system simulation results, the model of the six-port demodulator is implemented using the powerful schematic platform of Keysights Advanced Design System (ADS) and the measured S-parameters of the fabricated six-port. The performances of the six-port based direct conversion receiver model are assessed in terms of various PSK/QAM modulated signals, and Error Vector Magnitude (EVM) for different local-oscillator (LO) and RF power levels. The obtained results demonstrate that the six-port demodulator is a serious candidate for the homodyne receivers suited to the future 5G short-range wireless communication systems.

Low-cost high data-rate direct-conversion multi-port receiver for millimeter-wave indoor wireless applications

Performance analysis of a millimeter-wave direct conversion receiver, based on the S-parameter measurement results of recently fabricated multiport circuit, is presented in this paper. In order to obtain realistic and highly accurate modeling, the measured S-parameters of the fabricated multiport are introduced in computer model using the schematic platform of Keysights Advanced Design System (ADS). The performances in terms of Bit Error Rate (BER) are analyzed for various data-rates of a pseudorandom QPSK signal: 100 Mbps, 200 Mbps, 500 Mbps, 800 Mbps and 1 Gbps. The obtained BER results, demonstrate the effectiveness of the direct QPSK multiport demodulator for high data-rates up to 1 Gbps.