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The frequency spectrum is currently used for many applications and this resource is limited. There is also a growing demand for the use of higher frequencies, resulting from the demand from electronic warfare systems. Therefore, it is necessary to use the high band spectrum. The main advantages of working at high frequencies include more available bandwidth, smaller circuits, less interference with other services, and a less saturated spectrum.1 In this context, ultra-wideband microwave circuits have gained prominence in radiocommunications systems because many applications demand the use of large bandwidths and these kinds of circuits are of great relevance in microwave technology.

The advantage of working at high frequencies is making the development of radio-communications systems possible at frequencies of up to 30 GHz. This implies the resolution of new technological problems in addition to the design, assembly and manufact-uring problems in these frequency bands. There are currently multiple applications that work in the millimeter-wave band. Specifically, there are very interesting applications in the area of electronic warfare, such as high resolution radar or in the area of communications, such as LMDS or WiMAX systems.

Power dividers are key circuits used in many microwave applications. The function of these circuits is to divide the input signal into two or more output signals of lower power. In this article, a two-section Wilkinson power divider in microstrip technology, which covers a bandwidth of 1.585 octaves (15 to 45 GHz), has been designed, developed and measured. The measured results show good agreement with the simulations.

Basic Theory