US5218372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band spherical antenna with improved impedance-matching circuit
Assignee: Individual
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Filing: 1992-05-15
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Granted: 1993-06-08
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Expires: 2012-05-15
Abstract
Abstract A new wide-frequency-band spherical antenna structure which comprises a spherical antenna, an insulating sleeve, an impedance-matching element, a fixed disc, a center-needle seat, and a socket member with a high-frequency connector; the impedance-matching element (inductance coil) is to be fitted in the spherical antenna and the socket member; the impedance-matching element and the socket member of the high-frequency connector form an impedance-matching network to provide a nominal capacitance; the structure not only can facilitate the assembling procedures thereof, but also can omit the test and adjustment procedures as required by the conventional antenna; moreover, such an antenna has a small size without affecting the excellent reception efficiency.
Inventors
- 👤 Chen-Sheng Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:23
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/40; H01Q9/32; H01Q9/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
194 words
A wide-frequency-band spherical antenna structure comprising: a spherical antenna having a hollow space and a connecting sleeve extended therefrom; an insulating sleeve having an upper portion adapted to be sleeved about said connecting sleeve and a lower portion having a threaded outer periphery; a socket member having a threaded inner periphery on the upper portion thereof for threadably receiving said lower portion of said insulating sleeve and a high-frequency connector on the lower portion thereof; a spring-shaped impedance-matching element disposed within said hollow space of said spherical antenna and said insulating sleeve, said impedance member having a first end and a second end; a fixed disc disposed within said hollow space of said spherical antenna to allow electrical connection between said first end of said impedance-matching element and said spherical antenna; a center-needle seat affixed but electrically insulated from said high-frequency connector, said center-needle having a fastening hole for receiving said second end of said impedance-matching element; whereby said connecting sleeve of said spherical antenna, said insulating sleeve and said socket member form a first impedance-matching circuit, and said spring-shaped impedance-matching member, said insulating sleeve and said socket member form a second impedance-matching circuit.
Claim 2
Dependent Claim
194 words
A wide-frequency-band spherical antenna structure comprising: a spherical antenna having a hollow space and a connecting sleeve extended therefrom; an insulating sleeve having an upper portion adapted to be sleeved about said connecting sleeve and a lower portion having a threaded outer periphery; a socket member having a threaded inner periphery on the upper portion thereof for threadably receiving said lower portion of said insulating sleeve and a high-frequency connector on the lower portion thereof; a spring-shaped impedance-matching element disposed within said hollow space of said spherical antenna and said insulating sleeve, said impedance member having a first end and a second end; a fixed disc disposed within said hollow space of said spherical antenna to allow electrical connection between said first end of said impedance-matching element and said spherical antenna; a center-needle seat affixed but electrically insulated from said high-frequency connector, said center-needle having a fastening hole for receiving said second end of said impedance-matching element; whereby said connecting sleeve of said spherical antenna, said insulating sleeve and said socket member form a first impedance-matching circuit, and said spring-shaped impedance-matching member, said insulating sleeve and said socket member form a second impedance-matching circuit.
Claim 3
Dependent Claim
27 words
The wide-frequency-band spherical antenna structure of claim 1 wherein said upper portion of said socket member and said lower portion of said insulating sleeve are glued together.
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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |