Patent ID: 7187250

Claim:
A coupler ( 10 ) comprising a first line ( 1 ) connecting a signal input ( 11 ) to a signal output ( 21 ), and a second line ( 2 ) connecting a matched connection ( 41 ) to a second output ( 31 ), which first and second line ( 1 , 2 ) are mutually coupled inductively and capacitively, characterized in that: a resonant structure ( 3 ) is provided; and the first line ( 1 ) and the second line ( 2 ) are coupled inductively and capacitively to the resonant structure ( 3 ), the resonant structure ( 3 ) comprises a thin-film capacitor ( 5 ) and a thin-film inductor ( 4 ), and the first and the second line ( 1 , 2 ) are coupled inductively and capacitively to the inductor ( 4 ).