Abstract
Impedance matching devices are essential elements in telecommunication systems. They avoid the reflection of the electromagnetic waves and promote the maximum power transference among circuits with different electric impedances. In dual-band telecommunication systems, new impedance matching techniques have been developed. In this article, the use of folded stubs composed of periodic structure is investigated. This methodology uses two stubs, one for each frequency bands. The isolation between them is achieved by the prohibited electromagnetic bands and the use of folds in the conductive strip, which form the periodic structures, allows reducing the dimensions of the device.
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