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US5001444A
Expired / Lapsed
US
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Two-frequency radiating device
Assignee: Alcatel Espace Industries SA
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Filing: 1989-12-22
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Granted: 1991-03-19
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Expires: 2009-12-22
Abstract
Abstract The present invention relates to a two-frequency radiating device comprising a waveguide radiating in a first frequency range opening out into a radiating element operating in a lower, second frequency range. The invention is particularly applicable to antennas.
Inventors
- 👤 Michel Salvan
- 👤 Didier Rene
- 👤 Philippe Lepeltier
- 👤 Thierry Dusseux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:28
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01Q; H01Q25/00; H01Q25/04; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A two-frequency radiating device using a first and second radiating element (10, 11) and a discontinuity, the first radiating element (10) being a first waveguide (10) which is excited in a first frequency range by a resonant plate (12) and which opens out into the second radiating element (11) which is a second waveguide frequency range by a resonant ring (13), said second radiating element including a flange having a central portion electrically connected to the first waveguide (10), said first and second elements (10 and 11) having a common axis of symmetry, the first frequency range being higher than the second frequency range; the first radiating element (10) being beyond cut-off compared with the second frequency range in order to decouple the signals radiated by said first and second elements (10, 11); and a common radiating aperture for said two signals.
Claim 2
Dependent Claim
142 words
A two-frequency radiating device using a first and second radiating element (10, 11) and a discontinuity, the first radiating element (10) being a first waveguide (10) which is excited in a first frequency range by a resonant plate (12) and which opens out into the second radiating element (11) which is a second waveguide frequency range by a resonant ring (13), said second radiating element including a flange having a central portion electrically connected to the first waveguide (10), said first and second elements (10 and 11) having a common axis of symmetry, the first frequency range being higher than the second frequency range; the first radiating element (10) being beyond cut-off compared with the second frequency range in order to decouple the signals radiated by said first and second elements (10, 11); and a common radiating aperture for said two signals.
Claim 3
Dependent Claim
22 words
A device according to claim 1, wherein each of the radiating elements is excited by a linearly or circularly polarized printed antenna.
Claim 4
Dependent Claim
32 words
A device according to claim 2, wherein the antennas, respectively formed by the resonating plate (12) and by the resonating ring (13) are fed via matched coaxial feed (14, 15, 16, 17).
Claim 5
Dependent Claim
48 words
A device according to claim 3, wherein the matched coaxial feeds (14, 15, 16, 17) for each antenna (12, 13) are situated at 90° from each other relative to the center of the waveguides, each coaxial feed being fed in phase quadrature by a hybrid coupler (18, 19).
Claim 6
Dependent Claim
46 words
A device according to claim 2, wherein the higher frequency antenna (12) is separated from the end of the associated waveguide (10) by a dielectric (20), and the lower frequency antenna (13) is separated from the end of the associated waveguide (11) by a dielectric (21).
Claim 7
Dependent Claim
26 words
A device according to claim 2, wherein both antennas are constituted by respective pairs of resonators, thereby enabling the passband of the device to be increased.
Claim 8
Dependent Claim
58 words
A device according to claim 6, wherein the first waveguide (10) is excited at the higher frequencies by two concentric disks (12 and 22) spaced apart by a dielectric (23), and the second waveguide (11) is excited at the lower frequency by two concentric rings (13 and 24), with the two rings being integrally formed in the device.
Claim 9
Dependent Claim
34 words
A device according to claim 2, wherein one of the two antennas is constituted by a single resonator excited by four coaxial feeds (25, 26, 27, 28; 30, 31, 32, 33) fed in quadrature.
Claim 10
Dependent Claim
15 words
A device according to claim 1, wherein the second radiating element is a plane array.
References Cited (Backward Citations)
FR2118848A1
Cited
US3731235A
Cited
US3864687A
Cited
FR2429504A1
Cited
US4434425A
Cited
US4837531A
Cited
US4758806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |