METHOD FOR DETECTING ARRIVAL AZIMUTH OF RADIO WAVE AND APPARATUS FOR DETECTING ARRIVAL AZIMUTH OF RADIO WAVE

摘要

PROBLEM TO BE SOLVED: To detect in time sequence azimuths of radio waves coming from horizontal and vertical directions by incorporating switches to RF output terminals of antennas arranged in the horizontal direction and antennas arranged in the vertical direction and changing the switches at every constant time. ;SOLUTION: A first switch 8a outputs either one of RF signals from directive antennas 1a and 1d under the control of a first control circuit 101. Similarly, a second switch 8b outputs either one of RF signals from directive antennas 1b and 1e under the control of the control circuit 101. A third switch 9 outputs either one of phase data output from a first memory circuit 51 and a second memory circuit 52 according to the control of the control circuit 101. An output circuit 72 outputs horizontal azimuth data and vertical azimuth data output from an arithmetic circuit 61 at every constant time as one set of data to an external apparatus according to the control of the control circuit 101. One kind of a circuit can process data to detect arrival azimuths in the horizontal direction and vertical directions although two kinds of circuits have been used.;COPYRIGHT: (C)2000,JPO