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US3704464A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of suppressing selected antenna radiation pattern side lobes while retaining maximum directive gain

Assignee: United States Department of the Air Force
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Filing: 1970-11-10
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Granted: 1972-11-28
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Expires: 1990-11-10
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Abstract

Abstract A method for maximizing aerial directive gain while simultaneously placing nulls (suppressing side lobes) in the farfield radiation pattern of the array. The expressions of the standard antenna gain equation that define the side lobes to be eliminated are equated to zero and solved for current phase and amplitude values. A new set of current values for the standard directive gain equation are derived through a transform operator that includes the derived phase and amplitude values. Techniques substantially identical are used to maximize a standard gain equation utilizing the new set of current values. The current phase and amplitude values derived from the maximization step are used to feed the antenna.

Inventors

  • 👤 Charles J Drane Jr
  • 👤 John F Mcilvenna Jr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 04:55
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/22

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 106 words
The method of simultaneously suppressing selected side lobes and retaining maximum directive gain in an antenna comprising the steps of determining from the standard gain formula for said antenna the current amplitude and phase values that equate the expressions defining said selected side lobes to zero, transforming the current values of said standard gain formula by an operator that includes said current amplitude and phase values to obtain a new set of current values that incorporate the effects thereof, determining the current values that provide maximum directive gain for a standard gain formula utilizing said transformed current values, and feeding said antenna with said current values.
Claim 2
Independent Claim 106 words
The method of simultaneously suppressing selected side lobes and retaining maximum directive gain in an antenna comprising the steps of determining from the standard gain formula for said antenna the current amplitude and phase values that equate the expressions defining said selected side lobes to zero, transforming the current values of said standard gain formula by an operator that includes said current amplitude and phase values to obtain a new set of current values that incorporate the effects thereof, determining the current values that provide maximum directive gain for a standard gain formula utilizing said transformed current values, and feeding said antenna with said current values.

References Cited (Backward Citations)

US3182330A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-11-28 1976-05-29 1976-11-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-11-28 1980-05-29 1980-11-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-11-28 1984-05-29 1984-11-28 $7700.00 Window Closed / Lapsed

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