This leads to the trade-off between the losses and the bandwidth. Generally, each stage makes the bandwidth wider, but simultaneously introduces transmission losses, which are critical for high power applications, as it is already written. One of the established methods that enable the broadband operation of the Wilkinson divider (combiner) is the use of multiple stages, as it was introduced in. With high output power this issue gains on importance Thus, power combiner has to feature with low loss and good isolation over a wide band at the same time.

The output power of one amplifier should not appear at the output of another amplifier’s output. Another important combiner parameter is isolation.

This two-stage 5-W wide-band RF power amplifier has been designed using a SiC MESFET power stage covering the frequency range from 10 MHz up to 2.4 GHz. The problem enlarges when broadband power amplifier like this shown in are combined. Therefore a low loss combiner is required what for one frequency or even narrow band operation could be realized. However, the combiner and splitter, which are in most cases the same structure introduces losses. In ideal case, when two amplifiers are considered the output power can be doubled. Dividing is required at the input of the power amplifier and combining is needed at its output. Even with the use of new wide band gap SiC or GaN transistors achieving high output power in power amplifiers require the use of power combining and dividing. The main disadvantage of the circuit is relatively narrow band of operation, which gains more on importance when ultra wide band solutions are required. The divider/combiner is used to combine the power of multiple transistors in an amplifier or antennas in a system, or divide the power among channels in a receiver. I NTRODUCTION The Wilkinson power divider is often made in microstrip or stripline form and is in common use in RF design, since it was introduced quite a lot years ago. Keyword: wilkinson powerd divider, combiner, tapering, power amplifier I. The limiting factor of this solution is the insertion loss. Such a combiner is broadband and works from 0.5 up to 3.5 GHz.

0 0493031426984, Short Abstract - This paper introduces a hybrid wideband architecture of the Wilkinson divider with tapered line and compares it with two-stage architecture. Broadband Wilkinson Divider Andreas Wentzel and Dariusz Pienkowski Technische Universität Berlin, Microwave Enginering Group, Einsteinufer 25, 10587 Berlin, Germany, tel.

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