US3343089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quarter wave low profile antenna tuned to half wave resonance by stub; also including a transistor driving stage
Assignee: Motorola Solutions Inc
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Filing: 1965-10-04
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Granted: 1967-09-19
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Earl R Murphy
- 👤 Donald R Wehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:40
CPC Classifications
H; H01; H01Q; H01Q23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A LOW PROFILE ANTENNA STRUCTURE FOR OPERATING IN A GIVEN FREQUENCY BAND INCLUDING IN COMBINATION, CONDUCTIVE MEANS FORMING A GROUND PLANE, AN ELONGATED ROD-LIKE CONDUCTOR HAVING A LENGTH EQUAL TO A QUARTER OF A WAVELENGTH IN THE GIVEN FREQUENCY BAND, SAID CONDUCTOR BEING MOUNTED PARALLEL TO AND ABOVE SAID GROUND PLANE, CONDUCTIVE END POSTS CONNECTED TO THE ENDS OF SAID ROD-LIKE CONDUCTOR, MEANS COUPLED TO SAID END POSTS AND TO SAID GROUND PLANE FORMING BYPASS CAPACITORS ISOLATING SAID END POSTS FOR DIRECT CURRENT FROM SAID GROUND PLANE, A TRANSMISSION LINE STUB CONNECTED TO THE MIDPOINT OF SAID CONDUCTOR AND TUNING SAID CONDUCTOR TO HALF WAVE RESONANCE, A TRANSISTOR INTEGRATED DIRECTLY INTO THE ANTENNA STRUCTURE AND HAVING INPUT AND OUTPUT MEANS, AND MEANS CONNECTING SAID OUTPUT MEANS TO SAID CONDUCTOR AT A POINT THEREON HAVING AN IMPEDANCE MATCHING THE OUTPUT IMPEDANCE OF SAID TRANSISTOR.
Claim 2
Dependent Claim
143 words
A LOW PROFILE ANTENNA STRUCTURE FOR OPERATING IN A GIVEN FREQUENCY BAND INCLUDING IN COMBINATION, CONDUCTIVE MEANS FORMING A GROUND PLANE, AN ELONGATED ROD-LIKE CONDUCTOR HAVING A LENGTH EQUAL TO A QUARTER OF A WAVELENGTH IN THE GIVEN FREQUENCY BAND, SAID CONDUCTOR BEING MOUNTED PARALLEL TO AND ABOVE SAID GROUND PLANE, CONDUCTIVE END POSTS CONNECTED TO THE ENDS OF SAID ROD-LIKE CONDUCTOR, MEANS COUPLED TO SAID END POSTS AND TO SAID GROUND PLANE FORMING BYPASS CAPACITORS ISOLATING SAID END POSTS FOR DIRECT CURRENT FROM SAID GROUND PLANE, A TRANSMISSION LINE STUB CONNECTED TO THE MIDPOINT OF SAID CONDUCTOR AND TUNING SAID CONDUCTOR TO HALF WAVE RESONANCE, A TRANSISTOR INTEGRATED DIRECTLY INTO THE ANTENNA STRUCTURE AND HAVING INPUT AND OUTPUT MEANS, AND MEANS CONNECTING SAID OUTPUT MEANS TO SAID CONDUCTOR AT A POINT THEREON HAVING AN IMPEDANCE MATCHING THE OUTPUT IMPEDANCE OF SAID TRANSISTOR.
References Cited (Backward Citations)
US2431124A
Cited
US3134074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |