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ニュースリリース

プレスリリース:2010年6月28日

アクティブ・ロードプル測定システム低周波対応

英国Mesuro社製高効率アクティブ・ロードプル測定システム低周波対応

先日、英国Mesuro社が米国IMS展にて発表致しましたのは、同社アクティブロードプルシステムの対応周波数が200MHz~67GHzへの拡張についてでございます。
従来、500MHz~だった周波数が200MHz~対応する事により、現在最も注目されている帯域の1つ”UHF帯”向けパワーデバイスの更なる高効率化をお約束致します。

展示会場内では、GaAs pHEMT / Class-Bでp1dB=90%以上の実演デモを行いました。

Mesuro IMS 2010

Mesuro Active Load Pull Breaks Nonlinear Barriers
UHF Frequencies, Improved Large Signal Model Accuracy and Record 90% Efficiencies

Anaheim, Calif., May 24, 2010 - Mesuro Limited, based in Cardiff, UK, announced today frequency extensions of their MB series active load pull solutions during the IMS 2010 International Microwave Symposium. Additionally, Mesuro shared their results of working with industry leaders to design harmonically tuned, near theoretically efficient power amplifiers (PAs). Mesuro’s solutions are meeting the needs of both commercial and military applications for obtaining highly efficient, high power PAs. These designs will extend battery life, lower operating temperatures, improve reliability and offer smaller overall footprints. At IMS, Mesuro will be demonstrating high power measurements on a Cree Device in the Tektronix booth #1033.

Active Source/Load Pull from UHF to Millimeter Wave

The MB series now offers all electronic active load pull capability from 200 MHZ to 67 GHz. While traditional passive tuning is physically limited by long wavelengths at UHF frequencies, Mesuro’s electronic solution is not affected by wavelength. Additionally, active tuning for fundamental or harmonic frequencies up to 67 GHz is now available.

“Our customers are requiring active tuning for a wider range of applications,” said Dr. Richard Emsley, CEO, Mesuro. “Whether it is designing new wireless applications in the now available analog TV bands or measuring the harmonics of military PAs, active load pull enables engineers to optimize their design in less iteration.”

Validating the Accuracy of Large Signal Models

The Mesuro MB150 150W solution, combined with waveform engineering techniques, is enabling high power PA designers to calibrate their large signal models for different classes of operation. For example, the system allows for quick evaluation of devices in Class F, inverse Class F and class J modes of operation for both ET and Doherty configurations.

“By comparing the measured impedances at the fundamental, 2nd, and 3rd harmonics, as well as the voltage and current waveforms at the transistor current generator we have been able to confirm the accuracy of our large signal models for our GaN HEMT transistor portfolio,” said Ray Pengelly, Strategic Business Development Manager, Cree.

Achieving Record Efficiencies on Existing Technologies

The ability to achieve near theoretical efficiencies requires accurate harmonic tuning. Mesuro’s active tuning capability can be applied to both the source and load side of device and allows for complete control of all in-band and out-of-band impedances. Mesuro, in association with TriQuint Semiconductor and Cardiff University, will be presenting results at IMS showing a commercial GaAs pHEMT device achieving efficiencies in-excess of 90% at P1dB in a class-B bias.

“Our customers are able to more accurately perform harmonic tuning on their PA designs, with a 100% success rate for improving their efficiencies and performance,” added Emsley.

About Mesuro Ltd

Headquartered in Cardiff, UK Mesuro Ltd focuses on commercializing RF test and measurement technologies resulting from Cardiff University’s world-renowned Centre for High Frequency Engineering. In addition to offering turnkey active load pull solutions, Mesuro also offers a wide range of testing services.


Mesuro社詳細は http://netwell.co.jp/wireless/maker/mesuro.html



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