Planar microwave antenna having high antenna gain
First Claim
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1. A microwave planar antenna, comprising:
- a plurality of antenna elements, wherein each antenna element comprises two microstrip conductors, each conductor having first and second ends and being bent into a plurality of successively connected U-shaped sections, the two conductors being disposed in parallel with mutually staggered U-shaped sections, whereby the two microstrip conductors alternately approach and separate from each other;
means for supplying power to the plurality of antenna elements, wherein the power supply means is a corporate-feed network coupled to the first ends of the microstrip conductors in the plurality of antenna elements; and
a plurality of patch antenna means for radiating power reaching the second ends of the microstrip conductors, wherein each patch antenna means couples the second ends of two microstrip conductors which comprise each antenna element, each patch antenna means is impedance-matched to the antenna element in which it couples the second ends of the two conductors, and each patch antenna means radiates as an antenna which is phase-matched to that antenna element.
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Abstract
A microwave plane antenna comprises a plurality of pairs of antenna elements connected at their one end to a power supply circuit and respectively including at the other terminating end an impedance-matched patch antenna means, whereby signal energy remaining at the terminating ends of the antenna elements is caused to be effectively utilized as radiation energy, and any power loss is restrained for a high antenna gain and improved aperture efficiency.
18 Citations
6 Claims
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1. A microwave planar antenna, comprising:
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a plurality of antenna elements, wherein each antenna element comprises two microstrip conductors, each conductor having first and second ends and being bent into a plurality of successively connected U-shaped sections, the two conductors being disposed in parallel with mutually staggered U-shaped sections, whereby the two microstrip conductors alternately approach and separate from each other; means for supplying power to the plurality of antenna elements, wherein the power supply means is a corporate-feed network coupled to the first ends of the microstrip conductors in the plurality of antenna elements; and a plurality of patch antenna means for radiating power reaching the second ends of the microstrip conductors, wherein each patch antenna means couples the second ends of two microstrip conductors which comprise each antenna element, each patch antenna means is impedance-matched to the antenna element in which it couples the second ends of the two conductors, and each patch antenna means radiates as an antenna which is phase-matched to that antenna element. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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Current AssigneeAsahi Matsushita Electric Works Ltd. (Panasonic Holdings Corporation), Sadahiko Nisimura, Toshio Makimoto
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Original AssigneeAsahi Matsushita Electric Works Ltd. (Panasonic Holdings Corporation), Sadahiko Nishimura, Toshio Makimoto
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InventorsKomatsu, Mikio, Kanda, Minoru, Matsuo, Masayuki, Abiko, Toshio, Nunoya, Hidetsugu, Ishizaki, Hirohumi, Makimoto, Toshio, Nishimura, Sadahiko
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Primary Examiner(s)Sikes, William L.
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Assistant Examiner(s)Wimer, Michael C.
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Application NumberUS06/819,610Time in Patent Office697 DaysField of Search343/700 MS, 343/829, 343/731, 343/846, 343/737, 343/725, 343/729, 343/864, 343/893US Class Current343/700.0MSCPC Class CodesH01Q 13/206 Microstrip transmission lin...H01Q 21/068 using parallel coplanar tra...
