Title:
CIRCULAR POLARIZATION RADAR TRANSPONDER AND LIFE-SAVING
Document Type and Number:
Japanese Patent JP3394214
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To cope with a horizontal polarization radar device as well as a circular polarization radar as a matter of course but also a vertical polarization radar by equipping a transponder with a circular polarization antenna part for receiving all electronic waves and a transmission part for generating a plurality of pulses with the electronic wave being received at a reception part as a trigger, and the like.
SOLUTION: An electronic wave being received by a helical-type circular polarization antenna part 1 is supplied to a transmission part 3 as a trigger signal for indicating the arrival of radar waves. The transmission part 3 generates a plurality of sweep signals at the same frequency band as the radar wave based on a trigger signal from the reception part 2 and transmits them to the helical-type circular polarization antenna part 1 which transmits a plurality of sweep signals to the air from the transmission part 3. Electromagnetic waves being radiated into the air are received mainly by a circular polarization radar and are recognized as an encounter signal. In this case, a case part 5 with a radome accommodates the helical-type circular polarization antenna part 1, the reception part 2, the transmission part 3, and a battery part 4.
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Inventors:
Keiyu Takase
Kenji Nishimura
Kenji Nishimura
Application Number:
JP19790599A
Publication Date:
April 07, 2003
Filing Date:
July 12, 1999
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01Q21/24; G01S7/02; G01S13/75; G01S13/76; G01S13/79; H01Q1/22; H01Q1/24; H01Q1/36; H01Q1/42; H01Q9/27; H01Q11/08; H01Q13/04; H01Q15/24; H04B1/034; H04B1/59; (IPC1-7): G01S13/75; G01S13/76; G01S13/79; H01Q1/24; H01Q1/42; H01Q11/08; H01Q21/24; H04B1/034; H04B1/59
Domestic Patent References:
| JP54121093A | ||||
| JP3162140A | ||||
| JP8265036A | ||||
| JP4745453A | ||||
| JP534448A | ||||
| JP1237482A |
Other References:
電子情報通信学会，アンテナ工学ハンドブック，日本，オーム社，１９８０年１０月３０日，７５−８２
Attorney, Agent or Firm:
Mamoru Takada (1 person outside)