Dielectric device

The invention is directed to a dielectric device that comprises a dielectric substrate (1) and at least one resonator unit (Q1). The dielectric substrate (1) comprises an outer surface covered with an external conductor film (3), excluding at least one end surface (21). The resonator unit (Q1) comprises a first hole (41) and a second hole (51). The first hole (41) is provided in said dielectric substrate (1), extending from said end surface (21) to an opposite surface (22) thereto, being open at said end surface (21) and said opposite surface (22), and having a first internal conductor (61) inside thereof. The second hole (51) is provided in said dielectric substrate (1) at a distance from said first hole (41), extending from said end surface (21) toward said opposite surface (22), being open at said end surface (21), closed at a bottom, and having a second internal conductor (81) inside thereof. The second internal conductor (81) is connected to said first internal conductor (61) at said end surface (21). The dielectric device includes at least one portion of external conductor film (301; 302; 303; 304) on said end surface (21) adjacent to said resonator unit (Q1), whereby said resonator unit (Q1) is inductively couplable to a further resonator unit.