Mitsubishi Electric Corporation and Mitsubishi Electric Research Laboratories, Inc. presented a paper¹ titled “3.0-3.6 GHz Wideband, over 46% Average Efficiency GaN Doherty Power Amplifier with Frequency Dependency Compensating Circuits,” at last year’s Radio Wireless Week describing this wide-band Doherty power amplifier design technique for next generation LTE base stations using GaN transistor technology. The demonstration at RWW2018 will further illustrate the ability to linearize an ultra-wideband signal applied to Mitsubishi Electric’s GaN power amplifier using an advanced pre-distortion technique provided by NanoSemi, Inc.

“The proliferation of smartphones and tablets will require a dramatic increase in wireless capacity of base stations. To meet this demand, mobile technologies are moving to next generation LTE in which the wireless capacities are increased by allocating multiple simultaneous frequency bands (carrier aggregation) above 3GHz,” said Kyle Martin, VP and General Manager, Mitsubishi Electric US, Inc. Semiconductor Division. “Operating in multiple simultaneous frequency bands usually requires multiple power amplifiers to cover each frequency band, leading to an increase in the size of base stations.”

Conventional base station Doherty power amplifier design presents many challenges to simultaneously achieve both high efficiency and low distortion for wide-band carrier aggregation. Using NanoSemi, Inc.’s linearization technology, Mitsubishi Electric’s wide-band Doherty power amplifier can achieve high efficiencies with up to 200MHz instantaneous bandwidth while maintaining ACLR of -50dBc. With this breakthrough, base station designers gain the ability to design a single flexible LTE power amplifier capable of many carrier aggregation scenarios, even above 3GHz.

*Data measured at room temperature. Measurements may vary board to board.

RWW2018 attendees are invited to stop by the Mitsubishi Electric US booth 201/300 at RWW2018 for more information and to view the latest GaN technology in action.

Mitsubishi Electric’s full line-up of GaN devices, with frequencies in cellular, Ku-, and Ka-bands at output powers ranging from 2 to 100 watts, supports a wide variety of end-communications applications, including cellular base station, satellite, ground station and point to point.

[1] Yuji Komatsuzaki, Keigo Nakatani, Shintaro Shinjo, Shinichi Miwa, Rui Ma, and Koji Yamanaka, “3.0-3.6 GHz Wideband, over 46% Average Efficiency GaN Doherty Power Amplifier with Frequency Dependency Compensating Circuits,” 2017 IEEE Radio and Wireless Week, Phoenix, AZ.

Mitsubishi Electric US, Inc.’s Semiconductor Division presents a portfolio of semiconductor and electronic devices that helps advance information processing and telecommunications. The division offers next-generation optical devices that support today's rapidly evolving optical telecommunications networks. They include high-frequency gallium nitride, gallium arsenide and silicon RF devices used in a variety of applications from two-way radios to telecommunications satellites. The division also provides leading-edge color TFT-LCD modules designed for high reliability and superior visibility. Mitsubishi Electric’s TFT-LCD modules deliver exceptional performance and excellent color quality in a broad range of indoor and outdoor operating environments. They can be used in such industrial applications as medical, factory automation, agriculture, construction, marine, and aviation. Most recently, the division added contact image sensors for machine vision applications to its product line. Additional information is available at http://us.mitsubishielectric.com/semiconductors/en/index.html.

In addition to semiconductor devices, Mitsubishi Electric US group companies' principal businesses include factory automation equipment, automotive electrical components, elevators and escalators, heating and cooling products, electric utility products, and large-scale video displays for stadiums and arenas. Mitsubishi Electric US group companies have roughly 31 locations throughout North America with approximately 4,000 employees.

NanoSemi, Inc develops breakthrough digital compensators to linearize non-linear dynamic systems such as wireless radios. Its performance -- particularly its spectral efficiency and low power consumption -- gives our customers a considerable competitive advantage in the instrumentation, portable and communication infrastructure markets. For more information about NanoSemi, visit www.nanosemitech.com

Media Contact (Mitsubishi Electric US, Inc.):
Tim Mosher
Tim.Mosher@meus.mea.com
815.262.0150

Media Contact (NanoSemi, Inc.):
Thomas Wessel
thomas.wessel@nanosemitech.com
781.907.7992