Distributed-constant filter

A distributed-constant filter comprising:

• (a) a dielectric filter body having a pair of opposite end faces, with at least two resonance holes extending through the filter body between the pair of end faces;
• (b) a conductive covering on the filter body including an inner portion formed on the surface of the filter body defining each resonance hole;
• (c) at least two capacitors at least partly disposed in the respective resonance holes in the filter body, each capacitor comprising:
• (1) a dielectric capacitor body;
• (2) a first and a second electrode on the capacitor body;
• (3) first terminal means connected to the first electrode and having a lead at least partly disposed outwardly of one associated resonance hole in the filter body;
• and
• (4) second terminal means connected to the second electrode and disposed in one associated resonance hole in the filter body;
• and
• (d) connector means disposed in each resonance hole in the filter body and electrically connecting the second terminal means of one associated capacitor to the inner portion of the conductive covering.

A distributed-constant filter comprising:

• (a) a dielectric filter body having a pair of opposite end faces, with first and second resonance holes extending through the filter body between the pair of end faces;
• (b) a conductive covering on the filter body including inner portions formed on the surfaces of the filter body defining the first and second resonance holes;
• (c) a first capacitor at least partly disposed in the first resonance hole in the filter body, the first capacitor comprising:
• (1) a dielectric capacitor body;
• (2) a first and a second electrode on the capacitor body;
• (3) first terminal means connected to the first electrode and having a lead at least partly disposed outwardly of the first resonance hole;
• and
• (4) second terminal means connected to the second electrode and disposed in the first resonance hole;
• (d) a second capacitor at least partly disposed in the second resonance hole in the filter body, the second capacitor comprising:
• (1) a second dielectric capacitor body;
• (2) a third and a fourth electrode on the second capacitor body;
• (3) third terminal means connected to the third electrode and partly disposed outwardly of the second resonance hole;
• and
• (4) fourth terminal means connected to the fourth electrode and disposed in the second resonance hole;
• and
• (e) connector means disposed in the first and second resonance holes in the filter body and electrically connecting the second terminal means of the first capacitor and the fourth terminal means of the second capacitor to the inner portions of the conductive covering.

A distributed-constsnt filter comprising:

• (a) a dielectric filter body having a pair of opposite end faces and outsid surface, with a resonance hole extending through the filter body between the pair of end faces;
• (b) an inner conductive covering formed on the inner peripheral face on the resonance hole;
• (c) an outer conductive covering formed on the outside surface on the filter body;
• (d) a capacitor at least partly disposed in the resonance hole in the filter body, the capacitor comprising:
• (1) a dielectric capacitor body;
• (2) a first and a second electrode on the capacitor body;
• (3) first terminal means connected to the first electrode and having a lead at least partly disposed outwardly of the resonance hole in the filter body;
• and
• (4) second terminal means connected to the second electrode and disposed in the resonance hole in the filter body;
• and
• (e) connector means disposed in the resonance hole in the filter body and electrically connecting the second terminal means of the capacitor to the inner conductive covering.

A distributed-constant filter comprising:

• (a) a dielectric filter body having a pair a of opposite end faces and four side faces, with at least two resonance holes extending through the filter body between the pair of end faces;
• (b) inner conductive coverings formed on inner peripheral faces on the resonance holes;
• (c) an outer conductive covering formed on the outside surface on the filter body;
• (d) at least two capacitors at least partly disposed in the respective resonance holes in the filter body, each capacitor comprising:
• (1) a dielectric capacitor body;
• (2) a first and a second electrode on the capacitor body;
• (3) first terminal means connected to the first electrode and having a lead at least partly disposed outwardly of one associated resonance hole in the filter body;
• and
• (4) second terminal means connected to the second electrode and disposed in one associated resonance hole in the filter body;
• and
• (e) connector means disposed in each resonance hole in the filter body and electrically connecting the second terminal means each capacitor to each inner conductive covering.