US4403221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Millimeter wave microstrip antenna
Assignee: Honeywell Inc
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Filing: 1981-08-10
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Granted: 1983-09-06
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Expires: 2001-08-10
Abstract
Abstract An orthogonally-polarized microstrip patch radiator feed structure comprising a cavity of circular cross section, a microstrip radiation emitter including a first ground plane at the bottom of the cavity, a first non-conductive substrate overlying the first ground plane, a circular conductive transmit patch on the first substrate, and a first input line on the first substrate extending radially to the transmit patch, and a microstrip radiation receiver, including a second non-conducting substrate overlying and spaced from said first substrate, a second ground plane on the inner surface of the second substrate in the form of a first array of spaced parallel conductive bars orthogonal to the radius of the first input line, a circular receive patch on the outer surface of said second substrate in the form of a second array of spaced parallel conductive bars aligned with the bars of the first array, and a second input line of the second substrate connected to the receive patch and extending radially in a direction orthogonal to the first input line, so that the radiation from the transmit patch is emitted through the spaces between the bars of the arrays.
Inventors
- 👤 John R. Lamberg
- 👤 Joseph E. Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:50
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/001; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/247; H01Q9/00; H01Q9/04; H01Q9/0407
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
An orthogonally-polarized microstrip patch radiator feed structure comprising, in combination: a cavity of circular cross section; a microstrip radiation emitter including a first ground plane at the bottom of said cavity, a first non-conductive substrate overlying said first ground plane, a circular conductive transmit patch on said first substrate, and a first input line on said first substrate extending radially to said transmit patch; and a microstrip radiation receiver, including a second non-conducting substrate overlying and spaced from said first substrate, a second ground plane on the inner surface of said second substrate in the form of a first array of spaced parallel conductive bars orthogonal to the radius of said first input line, a circular receive patch on the outer surface of said second substrate in the form of a second array of spaced parallel conductive bars aligned with the bars of said first array, and a second input line on said second substrate connected to said receive patch and extending radially in a direction orthogonal to said first input line, so that the radiation from said transmit patch is emitted through the spaces between the bars of said arrays.
Claim 2
Dependent Claim
191 words
An orthogonally-polarized microstrip patch radiator feed structure comprising, in combination: a cavity of circular cross section; a microstrip radiation emitter including a first ground plane at the bottom of said cavity, a first non-conductive substrate overlying said first ground plane, a circular conductive transmit patch on said first substrate, and a first input line on said first substrate extending radially to said transmit patch; and a microstrip radiation receiver, including a second non-conducting substrate overlying and spaced from said first substrate, a second ground plane on the inner surface of said second substrate in the form of a first array of spaced parallel conductive bars orthogonal to the radius of said first input line, a circular receive patch on the outer surface of said second substrate in the form of a second array of spaced parallel conductive bars aligned with the bars of said first array, and a second input line on said second substrate connected to said receive patch and extending radially in a direction orthogonal to said first input line, so that the radiation from said transmit patch is emitted through the spaces between the bars of said arrays.
Claim 3
Dependent Claim
25 words
A structure according to claim 1 in which the bars of said second array are more closely spaced than the bars of said first array.
Claim 4
Dependent Claim
20 words
A structure according to claim 1 in which said second ground plane is of larger diameter than said transmit patch.
Claim 5
Dependent Claim
19 words
A structure according to claim 1 in which said cavity has a conductive wall connected to said ground planes.
Claim 6
Dependent Claim
221 words
A microwave antenna comprising a parabolic reflector, an orthogonally polarized microstrip patch antenna feed structure, and means supporting said feed structure substantially at the focus of said reflector, said feed structure comprising, in combination: a cavity of circular cross section opening toward said reflector; a microstrip radiation emitter in said cavity, including a first ground plane at the bottom of said cavity, a first non-conducting substrate overlying said first ground plane, a circular transmit patch on said substrate, and a first input line on said first substrate extending radially to said transmit patch through an impedance transformer; and a microstrip radiation receiver comprising a second non-conductive substrate overlying and spaced from said first substrate, a second ground plane on the inner surface of said second substrate in the form of a first pattern of space parallel conductors orthogonal to said input line, a circular receive patch on the outer surface of said second substrate in the form of a second pattern of spaced parallel conductors aligned with the conductors of said first pattern, and a second input line on said second substrate connected to said receive patch through an impedance transformer, in a direction orthogonal to said first input lines, so that radiation from said transmit patch is emitted to said reflector through the spaces between the conductors of said patterns.
Claim 7
Dependent Claim
221 words
A microwave antenna comprising a parabolic reflector, an orthogonally polarized microstrip patch antenna feed structure, and means supporting said feed structure substantially at the focus of said reflector, said feed structure comprising, in combination: a cavity of circular cross section opening toward said reflector; a microstrip radiation emitter in said cavity, including a first ground plane at the bottom of said cavity, a first non-conducting substrate overlying said first ground plane, a circular transmit patch on said substrate, and a first input line on said first substrate extending radially to said transmit patch through an impedance transformer; and a microstrip radiation receiver comprising a second non-conductive substrate overlying and spaced from said first substrate, a second ground plane on the inner surface of said second substrate in the form of a first pattern of space parallel conductors orthogonal to said input line, a circular receive patch on the outer surface of said second substrate in the form of a second pattern of spaced parallel conductors aligned with the conductors of said first pattern, and a second input line on said second substrate connected to said receive patch through an impedance transformer, in a direction orthogonal to said first input lines, so that radiation from said transmit patch is emitted to said reflector through the spaces between the conductors of said patterns.
Claim 8
Dependent Claim
15 words
An antenna according to claim 5 in which one of said patterns comprises horizontal conductors.
Claim 9
Dependent Claim
23 words
An antenna according to claim 5 in which the conductors of one of said patterns lie in a set of parallel vertical planes.
Claim 10
Independent Claim
35 words
The method of operating a microwave transeiver which comprises the step of emitting energy from a first microstrip patch antenna through gaps in the ground plane and receiving patch of a second microstrip patch antenna.
Claim 11
Independent Claim
35 words
The method of operating a microwave transeiver which comprises the step of emitting energy from a first microstrip patch antenna through gaps in the ground plane and receiving patch of a second microstrip patch antenna.
Claim 12
Dependent Claim
16 words
The method of claim 8 in which said patches are arranged for energization of orthogonal polarization.
References Cited (Backward Citations)
US4364050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |