Scientists from St. Petersburg Electrotechnical University "LETI" have developed a domestic prototype of a compact power amplifier that will allow the creation of energy-efficient devices for advanced 4G and 5G communication technologies. This was reported by the university's press service.
We have developed a prototype of an ultra-high-frequency power amplifier. Its uniqueness lies in the use of an electronically controlled output circuit within the amplifier, providing dynamic load management. Such an amplifier can be used in frequency ranges that are of interest for modern communication systems, such as 4G and 5G.
Traditional power amplifiers provide fixed output power, which does not always meet the requirements of devices operating with complex signals. Such amplifiers can introduce nonlinear distortions and have a low efficiency.
Currently, conventional cellular tower modules use Doherty power amplifiers with two or more transistors to control signals. This allows maintaining high energy efficiency over a wide range of output powers. LETI scientists set themselves the task of creating a prototype power amplifier with similar energy efficiency, but in a more compact design.
Specialists used electronically controlled circuits based on ferroelectric materials. Experiments have shown that such circuits provide a compact voltage control system for the signal in the amplifier with similar efficiency of the communication system.
In the future, the development can be used in 5G high-bandwidth communication systems to amplify complex signals. The device can function as a standalone amplifier or in addition to existing architectures to expand the dynamic range.
Earlier www1.ru reported that Rostec developed a traveling wave tube for the Express-RV satellites.
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