MULTIBAND WHIP ANTENNA

摘要

A multiband antenna, including an elongate radiating element including a first elongate portion and a second elongate portion, a coil galvanically connected to the first elongate portion of the elongate radiating element, a radio-frequency connector galvanically connected to the coil, a conductive layer enclosing at least the coil and the first elongate portion of the elongate radiating element and spaced apart therefrom and at least one conductive choke surrounding a part of the second elongate portion of the elongate radiating element and spaced apart therefrom, the elongate radiating element in conjunction with the at least one conductive choke being operative to radiate in a low frequency band and at least one high frequency band.

主权项

1. A multiband antenna, comprising:
an elongate radiating element comprising a first elongate portion and a second elongate portion; a coil galvanically connected to said first elongate portion of said elongate radiating element; a radio-frequency connector galvanically connected to said coil; a conductive layer enclosing at least said coil and said first elongate portion of said elongate radiating element and spaced apart therefrom; and at least one conductive choke surrounding a part of said second elongate portion of said elongate radiating element and spaced apart therefrom, said elongate radiating element in conjunction with said at least one conductive choke being operative to radiate in a low frequency band and at least one high frequency band, wherein a wavelength of operation λn of said elongate radiating element in conjunction with said conductive choke in each one of said low frequency band and said at least one high frequency band is generally given by:
λn=(2 L)/nwherein L is an electrical length of said elongate radiating element in conjunction with said at least one conductive choke and n is an integer greater than or equal to 1.