US5898403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna formed of multiple dielectric substrates including shielded LC filter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1995-04-24
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Granted: 1999-04-27
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Expires: 2015-04-24
Abstract
Abstract An antenna device has an antenna part and a filter part combined into a single unit. The antenna part has a radiating electrode formed on a surface of layered dielectric substrates and a grounding electrode formed inside the layered structure. The filter part is formed below the antenna part and includes shield electrodes, capacitor electrodes and coil electrodes. A feed point on the antenna part and an input section of the filter part are electrically connected to each other through a roughhole, and external electrodes are formed on side surfaces of the multi-layered structure of the dielectric substrates, connecting the grounding electrode of the antenna part and the output section of the filter part. A slot electrode having a slot formed therethrough and a strip line extending perpendicularly to the slot may be inserted between the radiating electrode and the grounding electrode of the antenna part.
Inventors
- 👤 Yasuaki Saitoh
- 👤 Kazunari Kawahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/36; H01Q1/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
An antenna device comprising: a layered structure of dielectric substrates; an antenna part formed as a portion of said layered structure, said antenna part comprising a radiating electrode formed on a surface of said layered structure and a grounding electrode formed inside said layered structure; a filter part having an input section and an output section, said filter part being formed inside said layered structure and below said antenna part, and including a dielectric substrate having a pair of shield electrodes on one surface thereof, another dielectric substrate having a pair of capacitor electrodes on one surface thereof, and still another dielectric substrate having a pair of coil electrodes on one surface thereof, a feed point on said radiating electrode being electrically connected with said input section of said filter part through a throughhole formed through said layered structure; and external electrodes formed on side surfaces of said layered structure, said external electrodes connecting said grounding electrode and said output section of said filter part.
Claim 2
Dependent Claim
165 words
An antenna device comprising: a layered structure of dielectric substrates; an antenna part formed as a portion of said layered structure, said antenna part comprising a radiating electrode formed on a surface of said layered structure and a grounding electrode formed inside said layered structure; a filter part having an input section and an output section, said filter part being formed inside said layered structure and below said antenna part, and including a dielectric substrate having a pair of shield electrodes on one surface thereof, another dielectric substrate having a pair of capacitor electrodes on one surface thereof, and still another dielectric substrate having a pair of coil electrodes on one surface thereof, a feed point on said radiating electrode being electrically connected with said input section of said filter part through a throughhole formed through said layered structure; and external electrodes formed on side surfaces of said layered structure, said external electrodes connecting said grounding electrode and said output section of said filter part.
Claim 3
Dependent Claim
23 words
The antenna device of claim 1 wherein one of said shield electrodes and one of said external electrodes serve as said input section.
Claim 4
Dependent Claim
18 words
The antenna device of claim 2 wherein another one of said external electrodes serves as said output section.
Claim 5
Dependent Claim
31 words
The antenna device of claim 1 further comprising an additional dielectric substrate having a pair of trimming electrodes on one surface thereof for adjusting the resonance frequency of said filter part.
Claim 6
Dependent Claim
41 words
The antenna device of claim 1 further comprising: a slot electrode having a slot formed therethrough; and a strip line elongated perpendicularly to said slot, said slot trode and said strip line being between said radiating electrode and said grounding electrode.
Claim 7
Dependent Claim
17 words
The antenna device of claim 1 wherein said shield electrodes and said capacitor electrodes provide capacitance therebetween.
Claim 8
Dependent Claim
12 words
The antenna device of claim 1 wherein said coil electrodes provide inductance.
Claim 9
Dependent Claim
16 words
The antenna device of claim 5 wherein said shield electrodes said capacitor electrodes provide capacitance therebetween.
Claim 10
Dependent Claim
12 words
The antenna device of claim 5 wherein said coil electrodes provide inductance.
References Cited (Backward Citations)
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| 7.5 Years (Year 8) | 2006-04-26 | 2006-10-26 | 2007-04-27 | $3760.00 | Window Closed / Lapsed |
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