Direction Finding Devices with 8Ã\x978 Butler Matrix and Eight - Element Antenna Arrays

The paper concerns the devices for an instantaneous direction finding of radiation sources or targets illuminated by microwave signals. The investigated devices were made up of classic 8times8 Butler matrix and with 8 directional antennas placed on the circle and in the sector. There are presented the results of computer simulations which took into consideration dimensions of real double ridged antennas and non-zero distances between their phase centres.