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    • 16. 发明专利
    • Plane antenna
    • 平面天线
    • JP2014103694A
    • 2014-06-05
    • JP2014019211
    • 2014-02-04
    • Nippon Dengyo Kosaku Co Ltd日本電業工作株式会社
    • HORIE YUTAMATSUOKA TORUNAKANO HISAMATSU
    • H01Q19/17H01Q3/44
    • PROBLEM TO BE SOLVED: To provide a plane antenna by which a narrow beam and a high gain can be obtained over a wide frequency band with a periodic structure and a small number of excitation elements.SOLUTION: The plane antenna has a reflection plane, the periodic structure arranged on the reflection plane and on which a plurality of conductor patterns are arranged in a row or in a matrix, and at least two excitation elements arranged between the reflection plane and the periodic structure. Assuming λo is a free space wavelength of a working frequency fo, the interval of the at least two excitation elements is 1.3λo or more. The at least two excitation elements are each supplied with excitation power with different phases.
    • 要解决的问题:提供一种平面天线,通过该平面天线可以在具有周期性结构和少量激励元件的宽频带上获得窄波束和高增益。解决方案:平面天线具有反射平面, 周期性结构布置在反射平面上并且多个导体图案以行或矩阵形式布置,以及布置在反射平面和周期性结构之间的至少两个激励元件。 假设λo是工作频率fo的自由空间波长,则至少两个激励元件的间隔为1.3λo以上。 所述至少两个励磁元件各自具有不同相的励磁功率。
    • 19. 发明专利
    • Antenna device
    • JP5317821B2
    • 2013-10-16
    • JP2009116968
    • 2009-05-13
    • 三菱電機株式会社
    • 徹 高橋昌孝 大塚秀夫 住吉
    • H01Q3/26H01Q19/17
    • PROBLEM TO BE SOLVED: To provide an antenna device capable of improving power supply efficiency of an amplifier even if the excitation amplitude distribution of each antenna element is not constant amplitude when a plurality of amplifiers of single kind are used. SOLUTION: A beam formation unit 3 includes a plurality of amplifiers 5, a plurality of synthesizing circuits 6, a plurality of beam formation circuits 7, and a phase amplitude control circuit 8. The beam formation unit 3 can adjust excitation amplitude and excitation phase of each of antenna elements 4-1 to 4-M. The amplitude adjustment amount and the phase shift amount of the beam formation unit 3 are set by the amplitude phase control circuit 8, so that all equivalent isotropic radiation energy of a plurality of beams are identical. A narrow beam among a plurality of beams from the antenna elements 4-1 to 4-M is arranged at the central part of a coverage area, and a wide beam 112 among the plurality of beams is arranged at the end portion of the coverage area. COPYRIGHT: (C)2011,JPO&INPIT
    • 20. 发明专利
    • Antenna device
    • JP5305994B2
    • 2013-10-02
    • JP2009059241
    • 2009-03-12
    • 三菱電機株式会社
    • 昌夫 大和
    • H01Q19/17H01Q15/14
    • PROBLEM TO BE SOLVED: To provide an antenna device wherein degradation of gain due to passage loss increase of second radio waves is suppressed by setting the thickness of a first reflector at an optimum value in accordance with the incident angle of the second radio waves. SOLUTION: The antenna device includes: a first primary radiator 1 for radiating first radio waves W1; a second primary radiator 2 for radiating second radio waves W2; and a double reflector 3 having a center axis offset and arranged with respect to radio-wave radiation directions of the first and second primary radiators 1, 2. The double reflector 3 includes: a first reflector 4 having a conductive grid for reflecting the first radio waves W1 thereon and making the second radio waves W2 pass therethrough to radiate the first and second radio waves W1, W2 in predetermined directions; and a second reflector 5 for reflecting the second radio waves W2 thereon. The thickness T of the first reflector 4 is set at an optimum value varying in accordance with an incident angle θ of the second radio waves W2 with respect to the first reflector 4 varying according to the incident position of the second radio waves W2. COPYRIGHT: (C)2010,JPO&INPIT