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Application Of The Mesuro Active Load-Pull System In Doherty Power Amplifier Design And Optimization

2015-02-10 12:32:03| rfglobalnet Home Page

In general terms, power amplifiers used in communications systems must be large enough to amplify envelope peaks. This leads to amplifiers that are designed to offer the best efficiency at peak power, while actually spending most of the time operating inefficiently, amplifying smaller signals. With the advancement in next generation communication systems, which employ signals with ever increasing peak to average ratio, the pressures on the PA design continue to grow.

Tags: system design power application

TWT Amplifier: dB-3840

2015-02-10 10:38:15| rfglobalnet Products

The dB-3840 is a TWT Amplifier (TWTA) operating in the frequency range of 34.5 to 35.5 GHz providing 700 Watts minimum peak output power at a duty cycle of up to 10%. A wideband, periodic permanent magnet (PPM)-focused, conduction-cooled TWT is used for power amplification. The power supply topology uses proprietary low-noise, high-efficiency designs to operate the RF signal path. An embedded micro-controller provides the interface, control and protection functions and status indication for the TWT Amplifier. Standard interface protocol for remote operation is RS-485. Other protocols such as RS-232, RS-422, Ethernet, or custom interfaces are available as options. The TWT Amplifier is encased in an environmentally sealed package for outdoor and antenna pedestal mounted applications, and uses integral forced-air cooling for thermal management.

Tags: amplifier twt twt amplifier