US4792809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstrip tee-fed slot antenna
Assignee: Lockheed Martin Corp
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Filing: 1986-04-28
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Granted: 1988-12-20
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Expires: 2006-04-28
Abstract
Abstract A microstrip tee-fed slot antenna is made up of only a single printed circuit board having the tee feed and slot on the front side and a microstrip transmission line feed on the back side. A plurality of holes in the board surrounding the slot are electrically connected front to back to provide the antenna cavity. Since only a single board is used having all of the components of the antenna on either side, no disassembly is required to add to or modify the elements of the antenna.
Inventors
- 👤 Roland A. Gilbert
- 👤 Darrel F. Sedivec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:43
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/106
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
172 words
A tee-fed slot antenna, comprising: a board having a front side and a back side and made up of a dielectric material having a first electrically conductive layer bonded to the front side thereof with a portion of said electrically conductive layer removed to form two non-conducting areas separated by a conducting area comprising the arms of a tee in the middle of said two non-conducting areas; said board also having a second electrically conductive layer bonded to the back side thereof with a portion of said electrically conductive layer removed to form an elongated non-conducting cavity entrance; a plurality of connecting means, for connecting said first and second conductive layers, disposed around and spaced from said two non-conducting areas to define a cavity therewithin, and having the elongated cavity entrance extending from one ege of the cavity into said cavity; and a planar transmission line disposed on the back side of said board, said transmission line extending within the cavity entrance and having one end thereof electrically connected to the tee.
Claim 2
Dependent Claim
172 words
A tee-fed slot antenna, comprising: a board having a front side and a back side and made up of a dielectric material having a first electrically conductive layer bonded to the front side thereof with a portion of said electrically conductive layer removed to form two non-conducting areas separated by a conducting area comprising the arms of a tee in the middle of said two non-conducting areas; said board also having a second electrically conductive layer bonded to the back side thereof with a portion of said electrically conductive layer removed to form an elongated non-conducting cavity entrance; a plurality of connecting means, for connecting said first and second conductive layers, disposed around and spaced from said two non-conducting areas to define a cavity therewithin, and having the elongated cavity entrance extending from one ege of the cavity into said cavity; and a planar transmission line disposed on the back side of said board, said transmission line extending within the cavity entrance and having one end thereof electrically connected to the tee.
Claim 3
Dependent Claim
18 words
A tee-fed slot antenna as defined in claim 1, wherein said transmission line is a microstrip transmission line.
Claim 4
Dependent Claim
16 words
A tee-fed slot antenna as defined in claim 1, wherein said connecting means are plated-through holes.
Claim 5
Dependent Claim
15 words
A tee-fed slot antenna as defined in claim 1, wherein said connecting means are rivets.
Claim 6
Dependent Claim
18 words
A tee-fed slot antenna as defined in claim 1, wherein the two non-conducting areas are of equal size.
Claim 7
Dependent Claim
132 words
A tee-fed slot antenna, comprising: a single board with opposing sides and having electrically conductive layers on said opposing sides and a dielectric layer intermediate said electrically conductive layers; said board having a portion of said electrically conductive layer on one side thereof removed to form two non-conducting areas separated by a conducting area; means for connecting said electrically conductive layers to form a cavity about said two non-conducting areas; said board also having a portion of said electrically conductive layer on the other side thereof remove to form an elongated entranceway extending into said cavity from one edge thereof; and a planar transmission line disposed in the entranceway to feed energy to this cavity with said transmission line extending to and electrically connected to said conducting area intermediate said two-non-conducting areas.
Claim 8
Dependent Claim
132 words
A tee-fed slot antenna, comprising: a single board with opposing sides and having electrically conductive layers on said opposing sides and a dielectric layer intermediate said electrically conductive layers; said board having a portion of said electrically conductive layer on one side thereof removed to form two non-conducting areas separated by a conducting area; means for connecting said electrically conductive layers to form a cavity about said two non-conducting areas; said board also having a portion of said electrically conductive layer on the other side thereof remove to form an elongated entranceway extending into said cavity from one edge thereof; and a planar transmission line disposed in the entranceway to feed energy to this cavity with said transmission line extending to and electrically connected to said conducting area intermediate said two-non-conducting areas.
Claim 9
Dependent Claim
18 words
A tee-fed slot antenna as defined in claim 5, wherein said transmission line is a microstrip transmission line.
Claim 10
Dependent Claim
18 words
A tee-fed slot antenna as defined in claim 5, wherein the two non-conducting areas are of equal size.
Claim 11
Independent Claim
112 words
A method of constructing a tee-fed slot antenna, comprising the steps of: providing a layer of dielectric material having conductive material on both sides thereof; removing portions of the conductive material from one side to form two non-conducting areas separated by a conducting area; electrically connecting portions of the one side of the conductive material to portions of the other side of the conductive material to form a cavity; removing a portion of the conductive material from the other side to form a microstrip transmission line and elongated entranceway extending into the cavity from an edge thereof; and electrically connecting the transmission line and the conducting area between the two non-conducting areas.
Claim 12
Independent Claim
112 words
A method of constructing a tee-fed slot antenna, comprising the steps of: providing a layer of dielectric material having conductive material on both sides thereof; removing portions of the conductive material from one side to form two non-conducting areas separated by a conducting area; electrically connecting portions of the one side of the conductive material to portions of the other side of the conductive material to form a cavity; removing a portion of the conductive material from the other side to form a microstrip transmission line and elongated entranceway extending into the cavity from an edge thereof; and electrically connecting the transmission line and the conducting area between the two non-conducting areas.
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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) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |