US4879563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circularly polarized complementary antenna with patch and dipole elements
Assignee: Kyocera Corp
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Filing: 1988-10-26
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Granted: 1989-11-07
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Expires: 2008-10-26
Abstract
Abstract An antenna includes a half-wave dipole antenna and a semicircular patch antenna to form a complementary antenna assembly. The respective antennas are supplied with power to 90° phase difference to generate a circular polarized wave.
Inventors
- 👤 Shigeki Takeda
- 👤 Akihiro Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:14
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/245
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
An antenna comprising: a half-wavelength dipole antenna in the form of a semicircular ring at a specified frequency; an E 110 -mode patch antenna having a semicircular substantially planar configuration at said frequency; means for coupling received power from said dipole antenna and said patch antenna in 90° phase difference to produce circular polarization reception characteristics; and said dipole antenna and said patch antenna being adjacently disposed so the distance between them is relatively short compared to a wavelength at said frequency so as to minimize deviation of circular polarization characteristics.
Claim 2
Dependent Claim
91 words
An antenna comprising: a half-wavelength dipole antenna in the form of a semicircular ring at a specified frequency; an E 110 -mode patch antenna having a semicircular substantially planar configuration at said frequency; means for coupling received power from said dipole antenna and said patch antenna in 90° phase difference to produce circular polarization reception characteristics; and said dipole antenna and said patch antenna being adjacently disposed so the distance between them is relatively short compared to a wavelength at said frequency so as to minimize deviation of circular polarization characteristics.
Claim 3
Dependent Claim
62 words
The antenna of claim 1 wherein the semicircular ring lies substantially on a half of the x-y plane (x>0) and the semicircular substantially planar configuration of the patch antenna lies substantially on a plane parallel to the x-y plane within a small distance from the x-y plane compared to a wavelength at said specified frequency; whereby the antenna system is substantially planar.
Claim 4
Dependent Claim
122 words
An antenna comprising: a half-wavelength dipole antenna in the form of a semicircular ring at a specified frequency; an E 110 -mode patch antenna having a semicircular configuration at said frequency; a first amplifier connected to receive input from said dipole antenna; a second amplifier connected to receive input from said patch antenna; and means for adding outputs of said first and second amplifiers in 90° phase difference; said dipole antenna and said patch antenna being adjacently disposed so the distance between them is relatively short compared to a wavelength at said frequency so as to minimize deviation of circular polarization characteristics, and said amplifiers and said antennas being connected in a substantial power mismatching condition and in a noise matching condition.
Claim 5
Dependent Claim
122 words
An antenna comprising: a half-wavelength dipole antenna in the form of a semicircular ring at a specified frequency; an E 110 -mode patch antenna having a semicircular configuration at said frequency; a first amplifier connected to receive input from said dipole antenna; a second amplifier connected to receive input from said patch antenna; and means for adding outputs of said first and second amplifiers in 90° phase difference; said dipole antenna and said patch antenna being adjacently disposed so the distance between them is relatively short compared to a wavelength at said frequency so as to minimize deviation of circular polarization characteristics, and said amplifiers and said antennas being connected in a substantial power mismatching condition and in a noise matching condition.
Claim 6
Dependent Claim
57 words
An antenna according to claim 1 or claim 2 wherein said patch antenna includes a grounding member and a second semicircular antenna element provided on and insulated from said grounding member, said second antenna element being opened from said grounding member at the circumferential portion there and short-circuited to said grounding member at the straight portion thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |