Multi-wideband collinear dipole antenna
AssigneeNorsat International Inc.
InventorsXiufeng Shi, Yazi Cao, Tong Li
Life of this patent
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Abstract
An antenna comprising the primary and secondary radiation structures and impedance-matching circuit are disposed in a collinear configuration with single port. The impedance-matching circuit can expand the antenna bandwidth in plural frequency bands with low VSWR. The transmission line between the RF connector and radiation structures are frictional wrapped by ferrite toroid cores, which improves the antenna in term of electrical stability. This also decreases the antenna sensitivity to the ground plane.
Claims20
An antenna having a connector, the antenna comprising:
- (a) a dipole having a first conducting tube and a second conducting tube disposed collinear to the first conducting tube, the first and second conducting tubes being attached to a dielectric substrate extending between the first and second conducting tubes, the dipole being operable to radiate electromagnetic energy in a first frequency bandwidth;
- (b) a secondary radiation structure disposed on the dielectric substrate, the secondary radiation structure being operable to radiate electromagnetic energy in a second frequency bandwidth higher than the first frequency bandwidth;
- and
- (c) an impedance-matching circuit disposed on the dielectric substrate in electrical communication with the connector, the impedance-matching circuit being operable to facilitate radiation in the first frequency bandwidth via fundamental operation of the dipole, the impedance-matching circuit being further operable to facilitate radiation in the second frequency bandwidth via fundamental operation of the secondary radiation structure and via harmonic operation of the dipole.
An antenna having a connector, the antenna comprising:
- (a) first means for radiating electromagnetic energy in a first frequency bandwidth via fundamental dipole operation;
- (b) second means for radiating electromagnetic energy in a second frequency bandwidth via secondary dielectric-mounted operation and harmonic dipole operation, the second frequency bandwidth being higher than the first frequency bandwidth;
- and
- (c) means for impedance matching a connectorized input to the first means and to the second means.
Dependencies are inferred from the claim text.