Patent ID: 6211841
Filing Date: 2001-04-03
Classification: H01Q

Abstract:
A dual band base station antenna comprising:a first set of radiating elements operable at a first frequency range having a centre-band wavelength .lambda..sub.1 and a centre-band frequency f.sub.1 ;a second set of radiating elements operable at a second frequency range having a centre-band wavelength .lambda..sub.2 and a centre-band frequency f.sub.2 ;and a ground plane;wherein the centre-band frequency f.sub.1 of the first frequency range is of the order of 1/4-3/4 of the centre-band frequency f.sub.2 of the second frequency range;wherein the first set of radiating elements is arranged in two columns spaced less than .lambda..sub.1 apart;wherein the second set of radiating elements are interleaved around the two columns of the first set of radiating elements, the second set of radiating elements being spaced less than .lambda..sub.2 apart; andwherein the elements are spaced apart from the ground plane.