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Design of broadband high power amplifier modules over the range of 2…4 GHz with an output power of 50 W

Keywords:

M.P. Apin – Ph. D. (Econ.), First Deputy General Director – Main Engineer, JSC «SPE «Almaz» (Saratov) L.S. Sotov – Dr. Sc. (Eng.), Professor, Saratov State University named after N.G. Chernyshevsky A.L. Khvalin – Dr. Sc. (Eng.), Associate Professor, Saratov State University named after N.G. Chernyshevsky


The problem of obtaining large values of microwave power in a wide frequency band is relevant for a number of radio systems. Power amplifiers of radio systems determine the most important tactical and technical parameters of the systems, such as radiated and consumed power, operating frequency range, size and weight, reliability and cost. The article presents the results of numerical investigation of the parameters of high-power broadband amplifiers according to the scheme of multichannel power summation of serially produced domestic broadband transistors over the range of 2-4 GHz. The characteristic features of designing the amplifier modules with an output power of 50 W in continuous operation mode are discussed. Power transmission coefficient of the amplifier is more than 24 dB. The complexity of building amplifiers in a single package is caused by a large number of channels to be summated, by thermal problems and difficulties in tuning. One of the ways to solve this problem is to use identical amplifiers with further summation of their output powers with the use of summing circuits with low losses. This article presents an experience of the authors on the creation of high-power broadband amplifiers operating in continuous mode over the range of 2-4 GHz on a domestic element base. This work is resulted in creation of the design of high-power broadband amplifiers and its main units such as dividers / combiners for 2, 4, 8, 16 channels of microstrip implementation, and the basic two-stage amplifier module. The computer project of high-power broadband amplifier is presented, and its optimum performances are obtained over the frequency range from 2 to 4 GHz.
References:

 

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