Ericsson Telecommunicacoes S.a.

Luciene Demenicis

Walter Margulis

Maria Carvalho

Daniele Seixas

Luiz Conrado

An impedance-matching coupler () comprises a dielectric substrate () onto which a conducting strip () is disposed. A dielectric layer (), preferably a dielectric film, is formed on top of the conducting strip and the first dielectric layer to encircle the conducting strip. A metallic layer () is finally provided on top of the dielectric layer. The dielectric layer has a dielectric constant that is substantially higher that the dielectric constant for the dielectric substrate, preferably more than ten times higher. A dielectric film with a thickness of less than 100 &#x3bc;m is advantageous, preferably between 5 and 100 &#x3bc;m, and even more preferably between 10 and 70 &#x3bc;m. The thickness of the dielectric substrate is preferably larger than for the dielectric film, preferably more than ten time larger. The conducting strip has preferably a constant width. The dielectric film thickness is preferably larger than 10% of the conducting strip width.

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Luciene Demenicis