Abstract: A bandpass filter includes a first oscillating circuit having inductors (L1, L2) in parallel with capacitors (Cij1), and a second oscillating circuit having inductors (L3, L4) arranged in parallel with capacitors (Cij2). The capacitors (Cij1) of the first oscillating circuit have an assembly of variable capacitive elements (C11, C12, C13, C14) in series with a fixed capacitor (C1), and the capacitors (Cij2) of the second oscillating circuit have an assembly of variable capacitive elements (C21, C22, C23, C24) arranged in series with a fixed capacitor (C2). The first oscillating circuit and the second oscillating circuit are coupled together with capacitors of substantially fixed value (C3, C4) and these coupling capacitors are linked to different respective midpoints between variable capacitors in the first and second oscillating circuits.

Abstract: Choke printed on a material of thickness H, the choke including one or more turns characterized in that a turn includes a first metallized track deposited on a first face of the material, of a second metallized track deposited on a second face of the material, a track deposited on the first face being united with a track deposited on the second face by means of at least one metallized hole passing through the thickness of the material.

Abstract: The invention relates to a bandpass filter comprising at least one first oscillating circuit formed of inductive means (L1, L2) in parallel with capacitive means (Cij) and of a second oscillating circuit comprising inductive means (L3, L4) arranged in parallel with capacitive elements (Cij), the first oscillating circuit being coupled to the second oscillating circuit, characterized in that the capacitive means (Cij1) of the first oscillating circuit comprise a variable assembly of capacitive elements (C11, C12, C13, C14) in series with a fixed capacitor (C1) and in that the capacitive elements of the second oscillating circuit comprise an assembly of variable capacitive elements (C21, C22, C23, C24) arranged in series with a fixed capacitor (C2) and in that the first oscillating circuit and the second oscillating circuit are coupled by means of capacitive elements of substantially fixed value (C3, C4) and in that the capacitive coupling elements are linked to the midpoint (P1, P2) of two variable capacitive