20150042535 | ANTENNA ARRAY OF INVERTED-L ELEMENTS OPTIONALLY FOR USE AS A BASE STATION ANTENNA - An antenna for receiving and/or transmitting electromagnetic radiation, e.g. circularly polarized waves. The antenna is built of three parts. A radiating element in the form of a sequentially rotated array of 4 dual inverted-L shaped surfaces, where each individual radiating element is fed with the same magnitude and a 90° sequential phase difference for the purpose of creating right or left hand circular polarization. A ground plane. And optionally, a structure that resembles a dual so-called choke ring structure on which the array is mounted. This structure improves the axial ratio and radiating pattern of the radiating elements and also serves as housing/shielding of the accompanying electronics like low noise amplifiers and power conditioning. | 02-12-2015 |