ENERGY EFFICIENCY INCREASING OF RADIO TRANSMITTERS

Abstract

At present, increasing the energy efficiency of radio electronic equipment is one of the most important tasks in the development and modernization of equipment for all radio services, and in some areas of application of radio electronic equipment, energy efficiency is critical. The main problems that occur in the development and operation of radio transmitting equipment are considered, and solutions are listed that can increase the efficiency of transmitters. Since the increase in energy efficiency is especially important for high-power power amplifiers of the final stages of transmitters, in this paper we analyze the radio transmitters switching operating modes, suitable for building modulators of the final stages of radio transmitters of digital broadcasting systems. The operating modes of switching power amplifiers and methods for achieving high energy efficiency of power amplifiers are discussed, their advantages and disadvantages are shown. The comparative analysis of circuits and classes of various types switching power amplifiers showed that each of them has a number of disadvantages that do not allow choosing the universal optimal version of such amplifier, so that the use of specific power amplifiers depends of the transmitter required characteristics. Another way is to use synthetic and combined methods for constructing high-performance power amplifiers to increase of the transmitters final stages resulting efficiency.