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We demonstrate a wireless sub-THz communication system near 237.5 GHz with one to three carriers and up to 100 Gbit/s. We use an optical heterodyne I/Q Tx and a state-of-the-art active I/Q-MMIC at the Rx.
In this paper, we present the wireless data transmission of incoherent non-return to zero on-off keying (NRZ-OOK) signals with a data rate of 10 Gbit/s at a carrier frequency of 240 GHz. The transmitter (Tx) and receiver (Rx) are separated by a distance of 10 m. For a realistic, incoherent scenario, two independent, unsychronized local oscillators (LOs) are used at the transmitter and receiver side...
In this paper, we present the wireless data transmission of incoherent non-return to zero on-off keying (NRZ-OOK) signals with a data rate of 10 Gbit/s at a carrier frequency of 240 GHz. The transmitter (Tx) and receiver (Rx) are separated by a distance of 10 m. For a realistic, incoherent scenario, two independent, unsychronized local oscillators (LOs) are used at the transmitter and receiver side...
High carrier frequencies in the terahertz range 0.1…30 THz are required for wireless data transmission at line rates at or beyond 100 Gbit/s. Here we demonstrate a system with one to three carriers near 237 GHz for (75…100) Gbit/s single-polarization transmission over distances of (20…40) m. The narrow-band THz carrier is generated by photomixing of highly stable mode-locked laser lines in a uni-travelling-carrier...
The transmission of complex modulated data signals with data rates up to 30 Gbit/s is successfully realized using a 240 GHz wireless link based on active MMIC components. The paper presents the transmission of QPSK and 8-PSK modulated signals over a distance of 40 m as well as a characterization of the RF frontend based on S-parameter measurements and back-to-back signal transmission. The link quality...
We demonstrate a single-input single-output photonic wireless link at 237.5 GHz with record 100 Gbit/s data transmission over 20 m. We use an optical heterodyne I/Q transmitter and a state-of-the-art active I/Q-MMIC at the receiver.
Based on active millimeter-wave monolithic integrated circuits (MMICs), a pair of receiver and transmitter modules have been developed and used for wireless data transmission experiments at 240 GHz with data rates of up to 40 Gbit/s. Both modules are driven with a subharmonic local oscillator, located at 120 GHz and feature broadband quadrature I/Q IF terminals. The receiver module has a maximum conversion...
Based on active millimeter-wave monolithic integrated circuits (MMICs), a pair of receiver and transmitter modules have been developed and used for wireless data transmission experiments at 240 GHz with data rates of up to 40 Gbit/s. Both modules are driven with a subharmonic local oscillator, located at 120 GHz and feature broadband quadrature I/Q IF terminals. The receiver module has a maximum conversion...
In this paper, we present monolithic integrated I-Q receive and transmit MMICs for wireless data transmission in the frequency range around 240 GHz. The chipset features an RF bandwidth of more than 80 GHz which corresponds to an IF bandwidth of more than 40 GHz. This enables the direct up and down-conversion of broadband IF signals like on-off keyed modulations. The receiver, as well as the transmitter,...
Record-speed wireless data bridging at 220 GHz is demonstrated with a 20 Gbit/s NRZ-OOK and a 9 Gbit/s OFDM signal. We connect the wireless gateways of two fiber spans, each with up to 20 km.
A high linearity I/Q bi-directional mixer MMIC using a Lange coupler to generate the 90° phase shift between the I and Q ports for E-band communication systems has been successfully realized in a 50nm mHEMT technology. The mixer achieves a measured conversion gain of −11 dB without pre- or post-amplification and an IF bandwidth of 6 GHz. An on-wafer linearity measurement shows no compression behavior...
A system concept for a high data rate wireless link in the frequency range from 200 to 280 GHz is presented. The link is based on fully integrated millimeter wave circuits (MMICs) and promises data rates up to 40Gbit/s over a distance of one kilometer. A demonstrator working at a carrier frequency of 220 GHz serves as a proof-of-concept. Measurements with this demonstrator show data rates up to 25...
Wireless transmission of DVB-C television signals with up to 256-QAM modulation at an RF frequency of 220 GHz is presented. The RF frontend is employing active single-chip transmit and receive MMICs packaged into compact waveguide modules. The measured uncorrected BER in the coherent transmission setup over a distance of 1 m is 1.7e-5 and 9.1e-4 for a 128- and 256-QAM modulation format, respectively,...
Wireless transmission of DVB-C television signals with up to 256-QAM modulation at an RF frequency of 220 GHz is presented. The RF frontend is employing active single-chip transmit and receive MMICs, realized in 50 nm metamorphic HEMT technology, and packaged into compact waveguide modules. Their LO signal of 10 dBm is applied at the subharmonic frequency of 110 GHz. The transmitter module achieves...
For wireless high-data-rate applications, channel sounding, and radar sensors, the unlicensed frequency band around 60 GHz is of relevant commercial interest. Currently, there is enormous progress in the field of integrating 60 GHz technology in compact systems using multilayer technology and reducing costs for mass production. For full channel characterization, but also for consumer applications,...
In this paper wireless data transmission at 220 GHz with up to 12.5 Gbit/s data rate and over a distance of 2 meters is presented. At 12.5 Gbit/s, the measured eye diagram quality factor is 3.59. At 10 Gbit/s, the 215 − 1 PRBS signal is received with a measured bit error rate better than 3.0 · 10−10. The signal is modulated onto a carrier frequency at 220 GHz using fully integrated 50 nm metamorphic...
Two subharmonically pumped 210 GHz I/Q mixer MMICs have been successfully realized in a 100 nm gate length metamorphic high electron mobility transistor (mHEMT) technology. The mixers have been designed using a branchline and a Lange coupler to generate the 90° phase shift between the I and Q ports. A conversion gain of more than 19 dB has been achieved with both mixers. The measured LO to RF isolation...
A Lange coupler and a Wilkinson power divider have been successfully realized using a metamorphic high electron mobility transistor (mHEMT) monolithic microwave integrated circuit (MMIC) process to enable the integration of balanced mixers and image rejection mixers above 200 GHz. Prior to manufacturing the coupler performance has been verified on basis of 3D EM-simulations. The measurement results...
A novel balanced 210 GHz mixer MMIC with a measured IF bandwidth of more than 50 GHz and an RF bandwidth of more than 100 GHz has been successfully developed in a 50 nm mHEMT technology. The mixer achieves a measured conversion loss of 17 dB. The measured LO-to-RF isolation is better than 17 dB in the relevant frequency range. Two Lange couplers are used to balance the design. The IF signal is tapped...
An active frequency-doubler MMIC achieving an output frequency of 300 GHz and its monolithic integration with a 300 GHz resistive mixer is presented. The frequency-doubler provides a broadband source with an average output power of -9.5 dBm and better than 10 % conversion efficiency in the frequency range from 250 to 310 GHz. At 300 GHz, a non-saturated output power of -6.4 dBm is measured at an input...
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