Double Director Frame for Easy Beam Forming of Circular Polarized Dual L-Band Antennas

This paper presents a passive double director frame for tilting the main beam direction of a circularly polarized GNSS antenna. By adding a dual-band capable simple metal frame as a module to an already existing circularly polarized dual-band antenna, it can be used to operate in several beamforming operations. This enables the easy adaption of the antenna to various mounting positions on a car, airplane, or satellite. It is shown, that an elevation tilt of 20 degrees and more of the main beam direction can be realized under the condition of correct adjustment in dimensions and positioning.