Communications: directive radio wave systems and devices (e.g. – Determining direction – Monopulse
Reexamination Certificate
2005-02-08
2005-02-08
Lobo, Ian J. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Monopulse
C342S070000, C342S080000, C342S154000, C342S157000
Reexamination Certificate
active
06853329
ABSTRACT:
A monopulse radar system for detecting an azimuth depending upon amplitude difference or phase difference between signals respectively received by plural receiving antennas, includes: a transmitting array antenna and a receiving array antenna each including antenna elements forming an antenna train, at least one antenna switch disposed among the elements of the transmitting array antenna and/or the receiving array antenna, and a switch controller for turning ON/OFF the antenna switch to change an aperture length of the transmitting array antenna and/or the receiving array antenna thereby changing a beam shape thereof. The antenna elements of the transmitting array antenna and the receiving array antenna are formed on a dielectric substrate. A dielectric length between the antenna train formed by the antenna elements and the antenna switch is ½ dielectric wavelength.
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Samuel A. Sherman, “Monopulse principles and techniques”, Artech House, pp. 8-19.
European Search Report dated Mar. 3, 2003.
Kondoh Hiroshi
Shinoda Hiroshi
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi , Ltd.
Lobo Ian J.
Reed Smith LLP
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