A CDAA of which the Wullenweber is a type, consists of a group of omnidirectional antennas symmetrically spaced about the periphery of a circular reflector screen. The location of each antenna with respect to the screen and to the adjacent antenna is such that by using a suitable antenna output scanning system, the array provides high unidirectional gain in all directions of azimuth. The scanning procedure results in sweeping the horizon with a direction-finding beam through a continuous arc of 360 deg. A CDAA can also be connected to fixed-lobe-forming devices that provide fixed directional beams for receiving signals in any desired direction of azimuth. The array is capable of creating either a wide or narrow beam by selecting antennas in the array.
Read More About:
Photos – Click to enlarge :
“ What is legal, and what is NOT legal for our Chinese radios? Ask ten people, get ten answers. OK… A radio needs Part 95 acceptance for F... Read more
Danish Ham-Cyclist Thomas Andersen, OZ1AA, now is in North Africa and expects to be in Europe soon, on the last leg of his “Cycling the Globe“ bicycle... Read more