METHOD OF ELIMINATING RESONANCES IN MULTIBAND RADIATING ARRAYS

摘要

Providing a multiband antenna, comprising a column of lower band dipole elements that operate in a lower operational frequency band and a column of higher band dipole elements that operate in a higher operational frequency band, each higher band dipole element includes a higher band feed board and a dipole having a first dipole arm and a second dipole arm, it is an objective to reduce distortion in the radiation pattern of the lower operational frequency band. This is solved by, for each higher band dipole element, the length of the combination of the higher band feed board and the first dipole arm exceeds one quarter of a wavelength of the lower operational frequency band and tunes a common mode resonance to be out of the lower operational frequency band.