Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2006-08-15
2006-08-15
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S853000
Reexamination Certificate
active
07091921
ABSTRACT:
A traveling-wave combining array antenna apparatus includes first and second traveling-wave array antennas. The first traveling-wave array antenna has a plurality of antenna elements provided at intervals along a first feeder line, and has a radiating directivity characteristic. The second traveling-wave array antenna has a plurality of antenna elements provided at intervals along a second feeder line, and has a main beam of a half-value width and a radiating directivity characteristic of a side lobe level lower than that of the first traveling-wave array antenna. A transmitting signal is split into two signals, feeding the signals to the first and second traveling-wave array antennas, which are provided so that a variation of main-beam radiating angle of electromagnetic wave of transmitting signal radiated from the first traveling-wave array antenna corresponding to a frequency change, and that of the second traveling-wave array antenna are substantially canceled by each other.
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Hirokawa Jiro
Ogawa Koichi
Ohno Takeshi
Teraoka Toshihiro
Ho Tan
Matshushita Electric Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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