| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: A conventional phased array antenna used for a radar device degrades because a part of transmission power is consumed in a terminator connected to a transmission/reception changeover switch by mutual coupling between elements. <P>SOLUTION: The phased array antenna includes: a first antenna that transmits and receives signals; a second antenna that only receives signals; and a feeder circuit that distributes a transmission signal to the first antenna and synthesizes reception signals from the first antenna and the second antenna. The second antenna prevents generation of efficiency degradation during signal transmission by providing a stub for reflecting a transmission signal leaked and invaded while the first antenna is conducting signal transmission. <P>COPYRIGHT: (C)2013,JPO&INPIT |
