Patent US6642889B1 successfully refreshed from Google Patents.
US6642889B1
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Asymmetric-element reflect array antenna
Assignee: Raytheon Co
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Filing: 2002-05-03
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Granted: 2003-11-04
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Expires: 2022-05-03
Abstract
Abstract A reflect array antenna comprises a non-electrically conductive substrate with an array of antenna elements supported on the substrate. Each antenna element comprises a plurality of patch radiating elements arranged in rows and columns. Each patch radiating element comprises a plurality of notches formed in the element, the notches being angularly displaced around the circumference of the element. A plurality of stub short transmission lines are individually positioned in each of the plurality of notches and a plurality of switches individually couple one end of a notch to one of the plurality of stub short transmission lines.
Inventors
- 👤 Daniel T. McGrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:54
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q1/00; H01Q1/36; H01Q1/38; H01Q21/00; H01Q21/06; H01Q21/061; H01Q21/065; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/36; H01Q3/44; H01Q3/46; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0428
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
74 words
A patch antenna element, comprising: a non-electrically conducting substrate; a patch antenna element; a plurality of notches formed in the antenna element an angularly displaced around the circumference of the patch antenna element; a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 2
Dependent Claim
74 words
A patch antenna element, comprising: a non-electrically conducting substrate; a patch antenna element; a plurality of notches formed in the antenna element an angularly displaced around the circumference of the patch antenna element; a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 3
Dependent Claim
24 words
The antenna element as in claim 1 wherein the plurality of notches and the plurality of stub short transmission line comprise a non-even number.
Claim 4
Dependent Claim
35 words
The antenna element as in claim 1 wherein the dimensions of each of the plurality of notches varies with the impedance of the patch antenna element and the impedance of the stub short transmission lines.
Claim 5
Dependent Claim
35 words
The antenna element as in claim 1 wherein the patch antenna element comprises a circular configuration having a diameter determined by the frequency of operation of the antenna element and the density of the substrate.
Claim 6
Dependent Claim
39 words
The antenna element of claim 4 wherein the configuration of each of the plurality of notches varies with the circumference impedance of the patch antenna element and the impedance of each of the plurality of stub short transmission lines.
Claim 7
Dependent Claim
37 words
The antenna element as in claim 5 wherein the configuration of each notch is selected to produce an impedance match between the impedance of the stub short transmission lines and the impedance of the patch antenna element.
Claim 8
Dependent Claim
26 words
The antenna element as in claim 1 wherein the plurality of switches are selected from the group comprising: diodes, field effect transistors (FETs) or EMs devices.
Claim 9
Dependent Claim
88 words
A reflect array antenna, comprising: a non-electrically conductive substrate; an antenna array supported on the substrate, each antenna of the array comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission line, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 10
Dependent Claim
88 words
A reflect array antenna, comprising: a non-electrically conductive substrate; an antenna array supported on the substrate, each antenna of the array comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission line, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 11
Dependent Claim
25 words
The reflect array antenna as in claim 8 wherein the plurality of notches and the plurality of stub short transmission line comprise a non-even number.
Claim 12
Dependent Claim
36 words
The reflect array antenna as in claim 8 wherein the dimensions of each of the plurality of notches varies with the impedance of the patch antenna element and the impedance of the stub short transmission lines.
Claim 13
Dependent Claim
36 words
The reflect array antenna as in claim 8 wherein the patch antenna element comprises a circular configuration having a diameter determined by the frequency of operation of the antenna element and the density of the substrate.
Claim 14
Dependent Claim
40 words
The reflect array antenna of claim 11 wherein the configuration of each of the plurality of notches varies with the impedance of the circumference of the patch and the impedance of each of the plurality of stub short transmission lines.
Claim 15
Dependent Claim
38 words
The reflect array antenna as in claim 11 wherein the configuration of each notch is selected to produce an impedance match between the impedance of the stub short transmission lines and the impedance of the patch antenna element.
Claim 16
Dependent Claim
25 words
The reflect array antenna as in claim 8 wherein the stub short transmission lines are uniformly spaced about the circumference of the patch antenna element.
Claim 17
Dependent Claim
34 words
The reflect array antenna as in claim 8 wherein each stub short transmission line comprises a length selected for impedance matching to the patch antenna element at the connection point in the respective notch.
Claim 18
Dependent Claim
97 words
A circularly polarized reflect array antenna, comprising: a support substrate; a plurality of subarrays supported on the support substrate, each subarray comprising a plurality of antenna elements, each antenna element comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 19
Dependent Claim
97 words
A circularly polarized reflect array antenna, comprising: a support substrate; a plurality of subarrays supported on the support substrate, each subarray comprising a plurality of antenna elements, each antenna element comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches; and a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
Claim 20
Dependent Claim
27 words
The circularly polarized reflect array antenna as in claim 16 wherein the plurality of notches and the plurality of stub short transmission line comprise a non-even number.
Claim 21
Dependent Claim
38 words
The circularly polarized reflect array antenna as in claim 16 wherein the dimensions of each of the plurality of notches varies with the impedance of the patch antenna element and the impedance of the stub short transmission lines.
Claim 22
Dependent Claim
38 words
The circularly polarized reflect array antenna as in claim 16 wherein the patch antenna element comprises a circular configuration having a diameter determined by the frequency of operation of the antenna element and the density of the substrate.
Claim 23
Dependent Claim
44 words
The circularly polarized reflect array antenna of claim 19 wherein the configuration of each of the plurality of notches varies with the impedance of the circumference of the patch antenna element and the impedance of each of the plurality of stub short transmission lines.
Claim 24
Dependent Claim
40 words
The circularly polarized reflect array antenna as in claim 20 wherein the configuration of each notch is selected to produce an impedance match between the impedance of the stub short transmission lines and the impedance of the patch antenna element.
Claim 25
Dependent Claim
27 words
The circularly polarized reflect array antenna as in claim 16 wherein the stub short transmission lines are uniformly spaced about the circumference of the patch antenna element.
Claim 26
Dependent Claim
36 words
The circularly polarized reflect array antenna as in claim 16 wherein each stub short transmission line comprises a length selected for impedance matching to the patch antenna element at the connection point in the respective notch.
Claim 27
Dependent Claim
38 words
The circularly polarized reflect array antenna as in claim 16 further comprising: a scanning array controller coupled to each of the plurality of switches to activate each switch to scan the reflect array antenna in a controlled pattern.
Claim 28
Dependent Claim
130 words
A circularly polarized reflect array antenna, comprising: a plurality of subarrays supported on a support base, each subarray comprising a plurality of antenna elements, each antenna element comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission lines each stub positioned in one of the plurality of notches; a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines; a feed horn coupled to the support base for transmitting or receiving radio frequency energy; and a subreflector supported on the support base for focusing radio frequency energy from the feed horn to the plurality of subarrays.
Claim 29
Dependent Claim
130 words
A circularly polarized reflect array antenna, comprising: a plurality of subarrays supported on a support base, each subarray comprising a plurality of antenna elements, each antenna element comprising: a patch antenna element; a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element; a plurality of stub short transmission lines each stub positioned in one of the plurality of notches; a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines; a feed horn coupled to the support base for transmitting or receiving radio frequency energy; and a subreflector supported on the support base for focusing radio frequency energy from the feed horn to the plurality of subarrays.
Claim 30
Dependent Claim
39 words
The circularly polarized reflect array antenna as in claim 25 , further comprising: a scanning array controller coupled to each of the plurality of switches to activate each switch to scan the reflect array antenna in a controlled pattern.
Claim 31
Dependent Claim
38 words
The circularly polarized reflect array antenna as in claim 26 wherein the support base comprises a semiconductor substrate with a ground plane; and further comprising a plated via for shorting the patch antenna elements to the ground plane.
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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) | 2006-11-03 | 2007-05-05 | 2007-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-03 | 2011-05-05 | 2011-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-03 | 2015-05-05 | 2015-11-04 | $7700.00 | Window Closed / Lapsed |