Dipole antenna
First Claim
1. An antenna for transmitting and receiving radio signals within a selected frequency band, comprising:
- an integral dipole antenna member comprising a substantially cylindrical substrate formed from a flexible dielectric sheet material which has disposed on a surface thereof first and second radiating elements in a substantially collinear arrangement parallel to a longitudinal axis of the cylindrical substrate; and
a feed line including at least first and second feed conductors operatively in electrical contact with said first and second radiating elements respectively, to conduct signals to and from the radiating elements,wherein the radiating elements are arranged on the substrate such that in use an input impedance of the dipole antenna member is substantially matched to a characteristic impedance of the feed line over the selected frequency band.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of manufacturing a dipole antenna comprises the steps of forming first and second radiating elements on the surface of a flexible substrate, the radiating elements including respective feed points for making operative electrical contact with a feed line including corresponding first and second feed conductors. The radiating elements are arranged on the substrate such that, in use, an input impedance of the dipole antenna is substantially matched to a characteristic impedance of the feed line over a selected frequency band. The flexible substrate is then formed into a substantially cylindrical shape. The resulting antenna comprises an integral dipole antenna member having radiating elements disposed on a surface of a substantially cylindrical substrate. The antenna avoids the need to separately manufacture the radiating elements, and subsequently to assemble the elements to form a dipole antenna. The antenna is simple to construct, has a relatively low number of mechanical and electrical joints and contacts, and may provide improved mechanical stability and electrical performance as compared with prior art antennas.
-
Citations
20 Claims
-
1. An antenna for transmitting and receiving radio signals within a selected frequency band, comprising:
-
an integral dipole antenna member comprising a substantially cylindrical substrate formed from a flexible dielectric sheet material which has disposed on a surface thereof first and second radiating elements in a substantially collinear arrangement parallel to a longitudinal axis of the cylindrical substrate; and a feed line including at least first and second feed conductors operatively in electrical contact with said first and second radiating elements respectively, to conduct signals to and from the radiating elements, wherein the radiating elements are arranged on the substrate such that in use an input impedance of the dipole antenna member is substantially matched to a characteristic impedance of the feed line over the selected frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An antenna for transmitting and receiving radio signals within a selected frequency band, comprising:
-
an antenna array including a plurality of collinear integral dipole antenna members, each having first and second radiating elements disposed on a surface of a substantially cylindrical substrate; and a corporate feed structure directing a plurality of feed lines, each including respective first and second feed conductors operatively in electrical contact with each of said first and second radiating elements in the antenna array, wherein the radiating elements of each antenna member are arranged on the corresponding substrate such that in use an input impedance of each dipole antenna member is substantially matched to a characteristic impedance of the corresponding feed line over said selected frequency band. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method of manufacturing a dipole antenna, comprising the steps of:
-
forming first and second radiating elements on the surface of a flexible substrate, the radiating elements including respective feed points for making operative electrical contact with a feed line including at least corresponding first and second feed conductors, wherein the radiating elements are arranged on the substrate such that in use an input impedance of the dipole antenna is substantially matched to a characteristic impedance of the feed line over a selected frequency band; forming the flexible substrate into a substantially cylindrical shape having a longitudinal axis; and wherein the first and second radiating elements are formed on the substrate such that they are disposed in a substantially collinear arrangement parallel to said longitudinal axis. - View Dependent Claims (17, 18, 19, 20)
-
Specification