Antenna assembly

摘要

The present invention relates to an antenna assembly for transmitting and receiving electromagnetic waves. More particularly, this invention relates to a wideband and multiband omnidirectional antenna assembly for sending and receiving radio waves. Specifically, this invention relates to a radiative antenna element formed by way of a single-fed spiraled sheet of conductive material. The conductive material is interlaced with a dielectric material to form the radiative element. The radiative element includes a height of substantially less than ¼ of the characteristic wavelength of the lowest operating frequency.

主权项

1. An antenna assembly comprising:
a cable having a lead; solely a single radiative element having a height and connected to the lead for sending and receiving electromagnetic signals; wherein the radiative element includes a spirally wound sheet of conductive material having a length and a width; and wherein the height of the radiative element is equal to the width of the sheet of conductive material, and wherein the height is between 2.5% and 6% of the wavelength of an operating frequency of the antenna assembly.