Patent US6906674B2 successfully refreshed from Google Patents.
US6906674B2
Expired / Lapsed
US
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Aperture antenna having a high-impedance backing
Assignee: E-TENNA Corp
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Filing: 2002-06-12
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Granted: 2005-06-14
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Expires: 2022-06-12
Abstract
Abstract An antenna comprises a conductive member having an opening for radiating an electromagnetic signal. A circuit board is spaced apart from the conductive member by less than one-quarter wavelength of the electromagnetic signal. The circuit board has a series of conductive cells for suppressing at least one propagation mode propagating between the conductive member and circuit board over a frequency bandwidth range defined by a geometric arrangement of the conductive cells.
Inventors
- 👤 William E. McKinzie, III
- 👤 James T. Aberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:02
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q13/00; H01Q13/10; H01Q15/00; H01Q15/0006; H01Q15/006; H01Q15/008
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
104 words
An antenna comprising: a conductive member having an opening for radiating an electromagnetic signal, the conductive member having a first surface area bounded by a first perimeter; and a high-impedance backing spaced apart from the conductive member by less than one quarter of a free space wavelength of the electromagnetic signal, the high-impedance backing having a second surface area, bounded by a second perimeter, commensurate in size with the first surface area, the high-impedance backing having an array of conductive cells arranged for suppressing at least one propagation mode from propagating between the conductive member and the high-impedance backing over a certain frequency range.
Claim 2
Dependent Claim
104 words
An antenna comprising: a conductive member having an opening for radiating an electromagnetic signal, the conductive member having a first surface area bounded by a first perimeter; and a high-impedance backing spaced apart from the conductive member by less than one quarter of a free space wavelength of the electromagnetic signal, the high-impedance backing having a second surface area, bounded by a second perimeter, commensurate in size with the first surface area, the high-impedance backing having an array of conductive cells arranged for suppressing at least one propagation mode from propagating between the conductive member and the high-impedance backing over a certain frequency range.
Claim 3
Dependent Claim
14 words
The antenna according to claim 1 wherein the opening comprises a simple closed curve.
Claim 4
Dependent Claim
35 words
The antenna according to claim 1 wherein the high-impedance backing has a ground plane spaced apart from the conductive member by equal to or less than one-tenth of a free-space wavelength of the electromagnetic signal.
Claim 5
Dependent Claim
33 words
The antenna according to claim 1 wherein the conductive cells are arranged in an array facing the conductive member, wherein a subset of the conductive cells is electrically connected to a ground plane.
Claim 6
Dependent Claim
33 words
The antenna according to claim 1 wherein the high-impedance backing comprises a ground plane and connective conductors, where at least some of the connective conductors connect the conductive cells to the ground plane.
Claim 7
Dependent Claim
23 words
The antenna according to claim 1 wherein the spatial region between the conductive member and the high-impedance backing comprises an air dielectric region.
Claim 8
Dependent Claim
25 words
The antenna according to claim 1 wherein the spatial region between the conductive member and the high impedance backing is filled with a dielectric material.
Claim 9
Dependent Claim
19 words
The antenna according to claim 1 further comprising a transmission line for feeding the opening with an electromagnetic signal.
Claim 10
Dependent Claim
39 words
The antenna according to claim 8 wherein the transmission line comprises a coaxial cable connected to an edge of the opening between the ends of the opening so as to provide a desired impedance match to the transmission line.
Claim 11
Dependent Claim
37 words
The antenna according to claim 1 wherein the conductive cells are arranged to suppress a longitudinal section magnetic mode and a longitudinal section electric mode as the at least one propagation mode over the certain frequency range.
Claim 12
Dependent Claim
22 words
The antenna according to claim 1 wherein the conductive cells are arranged to suppress the tangential magnetic field of the high-impedance backing.
Claim 13
Dependent Claim
28 words
The antenna according to claim 1 wherein the conductive cells are arranged to provide a high impedance ground plane over the frequency band of operation for the antenna.
Claim 14
Dependent Claim
27 words
The antenna according to claim 1 wherein the opening comprises a slot with a longitudinal axis oriented substantially parallel to one principal axis of the conductive cells.
Claim 15
Dependent Claim
31 words
The antenna according to claim 1 wherein the opening comprises a slot with a longitudinal axis oriented at approximately a forty-five degree angle to one principal axis of the conductive cells.
Claim 16
Dependent Claim
24 words
The antenna according to claim 1 wherein metallic sidewalls are formed to provide a cavity region between the conductive member and the high-impedance backing.
Claim 17
Dependent Claim
17 words
The antenna according to claim 15 wherein the metallic sidewalls are formed from a series of vias.
Claim 18
Dependent Claim
73 words
A circuit board assembly comprising: a conductive member having an opening for radiating an electromagnetic signal; a substrate for supporting a series of conductive cells and vias for suppressing at least one propagation mode from propagating between the conductive member and the substrate over a certain frequency range; and a ground plane of the substrate spaced apart from the conductive member by less than one quarter free space wavelength of the electromagnetic signal.
Claim 19
Dependent Claim
73 words
A circuit board assembly comprising: a conductive member having an opening for radiating an electromagnetic signal; a substrate for supporting a series of conductive cells and vias for suppressing at least one propagation mode from propagating between the conductive member and the substrate over a certain frequency range; and a ground plane of the substrate spaced apart from the conductive member by less than one quarter free space wavelength of the electromagnetic signal.
Claim 20
Dependent Claim
21 words
The circuit board assembly according to claim 17 further comprising a transmission line for feeding the opening with the electromagnetic signal.
Claim 21
Dependent Claim
49 words
The circuit board assembly according to claim 17 wherein the transmission line comprises at least one of a stripline and a microstrip transmission line connected to an edge of the opening between the ends of the opening so as to provide a desired impedance match to the transmission line.
Claim 22
Dependent Claim
34 words
The circuit board assembly according to claim 17 wherein the ground plane is spaced apart from the conductive member by equal or less than one-twenty-fifth of a free space wavelength of the electromagnetic signal.
Claim 23
Dependent Claim
16 words
The circuit board assembly according to claim 17 wherein the opening comprises a generally rectangular slot.
Claim 24
Dependent Claim
33 words
The circuit board assembly according to claim 17 wherein the ground plane is spaced apart from the conductive member by equal to or less than one-twenty-fifth of a wavelength of the electromagnetic signal.
Claim 25
Dependent Claim
37 words
The circuit board assembly according to claim 17 wherein the conductive cells are arranged in an array facing the conductive member, wherein at least a subset of the conductive cells electrically is connected to the ground plane.
Claim 26
Dependent Claim
31 words
The circuit board assembly according to claim 17 further comprising connective conductors associated with the substrate, the connective conductors connecting at least some of the conductive cells to the ground plane.
Claim 27
Dependent Claim
33 words
The circuit board assembly according to claim 17 wherein the transmission line comprises a coplanar waveguide coupled to the opening between the so as to provide a desired impedance match to the waveguide.
Claim 28
Dependent Claim
38 words
The circuit board assembly according to claim 17 wherein the conductive cells are arranged to suppress a longitudinal section magnetic mode and longitudinal section electric modes as the at least one propagation mode over the certain frequency range.
Claim 29
Dependent Claim
28 words
The circuit board assembly according to claim 17 wherein the conductive cells and vias are arranged to suppress a tangential magnetic field at the surface of the substrate.
Claim 30
Dependent Claim
25 words
The circuit board assembly according to claim 17 wherein the conductive cells are arranged to provide a high impedance ground plane over the frequency range.
Claim 31
Dependent Claim
29 words
The circuit board assembly according to claim 17 wherein the opening comprises a slot with a longitudinal axis oriented substantially parallel to one principal axis of the conductive cells.
Claim 32
Dependent Claim
33 words
The circuit board assembly according to claim 17 wherein the opening comprises a slot with a longitudinal axis oriented at approximately a forty-five degree angle to one principal axis of the conductive cells.
Claim 33
Dependent Claim
24 words
The antenna according to claim 17 wherein metallic sidewalls are formed to provide a cavity region between the conductive member and the ground plane.
Claim 34
Dependent Claim
18 words
The antenna according to claim 31 wherein the metallic sidewalls are formed from a linear series of vias.
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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) | 2008-06-13 | 2008-12-13 | 2009-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-06-13 | 2012-12-13 | 2013-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-06-13 | 2016-12-13 | 2017-06-14 | $7700.00 | Window Closed / Lapsed |