Title:
SIGNAL DISTRIBUTION PHASE SWITCHING CIRCUIT AND ACTIVE ARRAY ANTENNA SYSTEM
Document Type and Number:
Japanese Patent JP3656990
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a signal distribution phase switching circuit for preventing reduction in the flexibility of a null beam pattern, while maintaining an effect of a tree structure as it is.
SOLUTION: The signal distribution phase switching circuit comprises at least one input terminal (130), a plurality of output terminals (170), a polyphase making circuit (110) having a plurality of base phase shifting circuits (140, 150, and 160) connected in a tree form to output a plurality of output signals having different phases from the input signal of the input terminal, and a signal selector (120) for selecting the output signal to be supplied to the plurality of the output terminals from the plurality of the output signals of the polyphase making circuit.
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Inventors:
Takafumi Yamaji
Toshiyuki Umeda
Toshiyuki Umeda
Application Number:
JP2001066553A
Publication Date:
June 08, 2005
Filing Date:
March 09, 2001
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H01Q21/06; H01P5/12; H01P5/16; (IPC1-7): H01P5/12; H01Q21/06
Domestic Patent References:
| JP11330841A | ||||
| JP3207104A | ||||
| JP2179103A | ||||
| JP62203403A | ||||
| JP61230503A | ||||
| JP59020773U | ||||
| JP4038102U |
Attorney, Agent or Firm:
Hideaki Togawa
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