Claims
- 1. A dielectric filter, comprising
- a block of dielectric material comprising first and second parts, said parts having respective connection surfaces opposite to each other, said block having an outer surface, two input/output electrodes disposed on the outer surface;
- a ground conductor disposed on the outer surface of said block except at locations adjacent to said input/output electrodes, whereby said ground conductor is electrically insulated from said input/output electrodes;
- a plurality of resonators provided in said block of dielectric material; and
- a conductor pattern disposed on the respective connection surface of one of said first and second parts;
- said conductor pattern having first portions establishing a capacitive coupling between said first portions and said resonators, respectively; and
- said connection surface on which said conductor pattern is disposed is laminated against the other of said first and second parts such that said conductor pattern is embedded in said block of dielectric material.
- 2. The dielectric filter according to claim 1, wherein said input/output electrodes are connected to said conductor pattern.
- 3. The dielectric filter according to claim 1, wherein said conductor pattern further has second portions establishing a coupling between said first portions.
- 4. The dielectric filter according to claim 3, wherein said input/output electrodes are connected to said conductor pattern.
- 5. The dielectric filter according to claim 3, wherein said coupling between said first portions comprises an inductor.
- 6. The dielectric filter according to claim 5, wherein said input/output electrodes are connected to said conductor pattern.
- 7. The dielectric filter according to claim 1, wherein the plurality of resonators are formed in respective resonator holes.
- 8. The dielectric filter according to claim 7, wherein said resonator holes are disposed entirely within said first part of said block, and separated from said conductor pattern by the dielectric material of said first part of said block.
- 9. The dielectric filter according to claim 8, wherein said conductor pattern is disposed on the second part of said block.
- 10. The dielectric filter according to claim 9, wherein said input/output electrodes are connected to said conductor pattern.
- 11. The dielectric filter according to claim 9, wherein said input/output electrodes are disposed on the second part of said block.
- 12. The dielectric filter according to claim 11, wherein said input/output electrodes are connected to said conductor pattern.
Priority Claims (4)
Number |
Date |
Country |
Kind |
4-010009 |
Jan 1992 |
JPX |
|
4-021392 U |
Mar 1992 |
JPX |
|
4-057894 |
Mar 1992 |
JPX |
|
4-035632 U |
Apr 1992 |
JPX |
|
Parent Case Info
This is a Continuation of application Ser. No. 08/719,335, filed on Sep. 25, 1996, abandoned, which is a continuation of application Ser. No. 08/572,154, filed on Dec. 8, 1995, abandoned, which is a continuation of application Ser. No. 08/349,461, filed on Dec. 5, 1994, abandoned, which is a continuation of application Ser. No. 08/008,903, filed on Jan. 25, 1993, abandoned.
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Number |
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Date |
Kind |
5130683 |
Agahi-Kesheh et al. |
Jul 1992 |
|
5157365 |
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Oct 1992 |
|
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Kobayashi et al. |
Mar 1994 |
|
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Hirai et al. |
Sep 1994 |
|
5572174 |
Kitaichi et al. |
Nov 1996 |
|
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Number |
Date |
Country |
0438149 |
Jul 1991 |
EPX |
0442418 |
Aug 1991 |
EPX |
0448085 |
Sep 1991 |
EPX |
0444948 |
Sep 1991 |
EPX |
62-40802 |
Feb 1987 |
JPX |
62-30402 |
Feb 1987 |
JPX |
62-183603 |
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JPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 13, No. 292 (E-782) (3640) Jul. 6, 1989; JP-A-10 73 802 (Matsushita Electric Works Ltd.) Mar. 20, 1989. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
719335 |
Sep 1996 |
|
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
572154 |
Dec 1995 |
|
Parent |
349461 |
Dec 1994 |
|
Parent |
008903 |
Jan 1993 |
|