Patent ID: 8184060
Filing Date: 2012-05-22
Classification: H01Q

Abstract:
1. A low profile, wide-band antenna operating in a frequency range between approximately 700 MHz and approximately 8.5 GHz, such antenna comprising: a ground plane; a cone-shaped relatively high frequency antenna element with a tip of the high frequency antenna element disposed adjacent to but electrically isolated from the ground plane with a base of the cone-shaped antenna element extending away from the ground plane; and three relatively low frequency antenna elements symmetrically arranged around the cone-shaped antenna element and electrically connecting and extending between the base of the cone-shaped antenna element and the ground plane, wherein a total height of the low profile, wide-band antenna is approximately equal to one-eighth wavelength (approximately 0.12λ) at a low frequency limit, wherein a diameter of the base of the cone-shaped antenna element is approximately equal to 0.232λ at the low frequency limit, and wherein a bandwidth of the low profile, wide-band antenna is approximately 12:1 with a voltage standing wave ratio (VSWR) of less than approximately 1.8 over the entire frequency range.