Patent US5821907A successfully refreshed from Google Patents.
US5821907A
Expired / Lapsed
US
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Antenna for a radio telecommunications device
Assignee: BlackBerry Ltd
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Filing: 1996-03-05
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Granted: 1998-10-13
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Expires: 2016-03-05
Abstract
Abstract A radio telecommunications antenna includes a telescoping antenna portion for substantially receiving an electromagnetic signal. The telescoping portion is attached by an antenna mast for conducting the electromagnetic signal. A dielectric spacer and an inductor are in electrical contact with the antenna mast. An RF connector is in electrical contact with the dielectric spacer, opposite the antenna mast, so as to form a capacitor. The RF connector is also in electrical contact with the inductor so that the capacitor and the inductor form an LC circuit with values selected to provide a predetermined impedance match with the remainder of the antenna.
Inventors
- 👤 Lizhong Zhu
- 👤 Yihong Qi
- 👤 Perry Jarmuszewski
- 👤 Peter J. Edmonson
- 👤 Steven Carkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:57
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/10; H01Q1/084; H01Q1/12; H01Q1/22
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
An antenna for a radio telecommunications device having components comprising: an antenna portion; an electrically conductive element in electromagnetic contact with to the antenna portion; a dielectric spacer in electromagnetic contact with the electrically conductive element; an inductor in electromagnetic contact with the electrically conductive element, and in electromagnetic contact with said dielectric spacer; and an RF connector in electromagnetic contact with said dielectric spacer, such that the electrically conductive element, the dielectric spacer, and the RF connector are components that form a capacitor, wherein the capacitor and the inductor are connected to form an LC circuit, wherein the RF connecter includes a plurality of posts which secure the dielectric spacer and increase the capacitance of the capacitor.
Claim 2
Dependent Claim
118 words
An antenna for a radio telecommunications device having components comprising: an antenna portion; an electrically conductive element in electromagnetic contact with to the antenna portion; a dielectric spacer in electromagnetic contact with the electrically conductive element; an inductor in electromagnetic contact with the electrically conductive element, and in electromagnetic contact with said dielectric spacer; and an RF connector in electromagnetic contact with said dielectric spacer, such that the electrically conductive element, the dielectric spacer, and the RF connector are components that form a capacitor, wherein the capacitor and the inductor are connected to form an LC circuit, wherein the RF connecter includes a plurality of posts which secure the dielectric spacer and increase the capacitance of the capacitor.
Claim 3
Dependent Claim
32 words
The antenna of claim 1 wherein the posts are trimmed to desired lengths so as to adjust the capacitance of the capacitor, in order to provide impedance matching to reduce parasitic capacitance.
Claim 4
Dependent Claim
10 words
The antenna of claim 2 wherein there are four posts.
Claim 5
Dependent Claim
37 words
The antenna of claim 3 wherein the values of the inductor and the components of the capacitor are selected so as to provide an antenna circuit with an impedance that matches that of the radio telecommunications device.
Claim 6
Dependent Claim
37 words
The antenna of claim 1 wherein the values of the inductor and the components of the capacitor are selected so as to provide an antenna circuit with an impedance that matches that of the radio telecommunications device.
Claim 7
Dependent Claim
107 words
An antenna for a radio telecommunications device having components comprising: an antenna portion for substantially receiving an electromagnetic signal: an LC circuit comprising a capacitor and an inductor, wherein the capacitor comprises: an electrically conductive element connected to the antenna portion; a dielectric spacer in electromagnetic contact with the electrically conductive element; an RF connector in electromagnetic contact with said dielectric spacer; wherein the inductor is in electromagnetic contact with the electrically conductive element and in electromagnetic contact with said dielectric spacer, so as to form an LC circuit with capacitance and inductance selected to provide impedance matching between the antenna portion and the radio telecommunications device.
Claim 8
Dependent Claim
107 words
An antenna for a radio telecommunications device having components comprising: an antenna portion for substantially receiving an electromagnetic signal: an LC circuit comprising a capacitor and an inductor, wherein the capacitor comprises: an electrically conductive element connected to the antenna portion; a dielectric spacer in electromagnetic contact with the electrically conductive element; an RF connector in electromagnetic contact with said dielectric spacer; wherein the inductor is in electromagnetic contact with the electrically conductive element and in electromagnetic contact with said dielectric spacer, so as to form an LC circuit with capacitance and inductance selected to provide impedance matching between the antenna portion and the radio telecommunications device.
Claim 9
Dependent Claim
17 words
The antenna of claim 6 wherein the inductor is received within a hole in the dielectric spacer.
Claim 10
Dependent Claim
34 words
The antenna of claim 6 further including a spring which applies a mechanical securing force to retain the dielectric spacer and the inductor in contact between the electrically conductive element and the RF connector.
Claim 11
Dependent Claim
22 words
The antenna of claim 8 wherein the electrically conductive element is the combination of the spring in contact with a hinge element.
Claim 12
Dependent Claim
23 words
The antenna of claim 6 wherein the antenna portion comprises a telescoping portion which can be varied between minimum and maximum extendible lengths.
Claim 13
Dependent Claim
20 words
The antenna of claim 10 wherein the extendible length of the telescoping antenna portion is between six and sixteen cm.
Claim 14
Dependent Claim
22 words
The antenna of claim 6 further comprising a housing for receiving and securing the components of the antenna into an assembled unit.
Claim 15
Dependent Claim
24 words
The antenna of claim 12 wherein the components of the antenna are secured with a dielectric epoxy that provides the capacitor with additional capacitance.
Claim 16
Dependent Claim
16 words
The antenna of claim 12 wherein the antenna portion is pivotable with 360 degrees of rotation.
Claim 17
Dependent Claim
24 words
The antenna of claim 6 wherein the components of the antenna are secured with a dielectric epoxy which provides additional capacitance to the capacitor.
Claim 18
Dependent Claim
20 words
The antenna of claim 6 wherein the components of the antenna are compact, thereby reducing the effect of parasitic capacitance.
Claim 19
Dependent Claim
13 words
The antenna of claim 6 wherein the electrically conductive element is a hinge.
Claim 20
Dependent Claim
23 words
The antenna of claim 17 wherein the hinge permits the antenna portion to be pivoted between 0 and 90 degrees to the vertical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-12 | 2002-04-13 | 2002-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-12 | 2006-04-13 | 2006-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-12 | 2010-04-13 | 2010-10-13 | $7700.00 | Window Closed / Lapsed |