摘要:
There is disclosed a loop antenna for mobile handsets and other devices. The antenna comprises a dielectric substrate (23) having first and second opposed surfaces and a conductive track (24) formed on the substrate (23). A feed point (26) and a grounding point (25) are provided adjacent to each other on the first surface of the substrate (23), with the conductive track (24) extending in generally opposite directions from the feed point (26) and grounding point (25) respectively and winding around the substrate (23) to the second surface and passing along a path generally opposite to the path taken on the first surface of the dielectric substrate (23). The conductive tracks (24) then connect to respective sides of a conductive arrangement (27) that extends into a central part of a loop formed by the conductive track (24) on the second surface of the dielectric substrate (23). The conductive arrangement (27) comprises both inductive and capacitive elements. The antenna can be multi-moded and operate in several frequency bands. Alternatively, the loop antenna is fed parasitically by a monopole or a feeding loop. The parasitic loop antenna my alternatively comprise a conductive loading plate instead of the conductive arrangement.
摘要:
There is disclosed a loop antenna for mobile handsets and other devices. The antenna comprises a dielectric substrate (23) having first and second opposed surfaces and a conductive track (24) formed on the substrate (23). A feed point (26) and a grounding point (25) are provided adjacent to each other on the first surface of the substrate (23), with the conductive track (24) extending in generally opposite directions from the feed point (26) and grounding point (25) respectively and winding around the substrate (23) to the second surface and passing along a path generally opposite to the path taken on the first surface of the dielectric substrate (23). The conductive tracks (24) then connect to respective sides of a conductive arrangement (27) that extends into a central part of a loop formed by the conductive track (24) on the second surface of the dielectric substrate (23). The conductive arrangement (27) comprises both inductive and capacitive elements. The antenna can be multi-moded and operate in several frequency bands. Alternatively, the loop antenna is fed parasitically by a monopole or a feeding loop. The parasitic loop antenna my alternatively comprise a conductive loading plate instead of the conductive arrangement.
摘要:
There is disclosed a radio-antenna module formed on a daughterboard comprising a substrate, a radio circuit and a monopole antenna. The radio circuit is fed between two points on the monopole antenna having a predetermined relative impedance difference and neither of which points is at zero impedance (ground). The module operates well in a vertical orientation and can discriminate between right and left hand circular polarisation, making it ideal for personal navigation device and other global positioning system applications.
摘要:
There is disclosed a module for an antenna system, the module comprising a dielectric support and a branched electrically conductive pathway formed on or in the support. The pathway comprises at least three arms each having a proximal and a distal end, the proximal ends being joined together or each connected to at least one other of the at least three arms, and the distal ends being separate from each other and configured as terminals. The modules may be configured as chip antennas. A plurality of antenna modules can connected together in order to create antenna systems with particular desired characteristics.
摘要:
There is disclosed an antenna device made up of at least first, second and third conductive metal plates arranged in a parallelepiped configuration. The third plate defines a lower plane and the first and second plates together define an upper plane substantially parallel to the lower plane. The first and second plates are separated by a slot in the upper plane, and the second and third plates are connected to each other by a grounding connection. The first plate comprises a first, active antenna arm that is provided with a feed connection, and the second plate comprises a second antenna arm that may be passive or active. The antenna device generates a circularly polarised radiation pattern that is good for personal navigation devices, while being significantly more compact than existing ceramic patch antennas that are typically used in these devices.
摘要:
There is disclosed a radio-antenna module formed on a daughterboard comprising a substrate, a radio circuit and a monopole antenna. The radio circuit is fed between two points on the monopole antenna having a predetermined relative impedance difference and neither of which points is at zero impedance (ground). The module operates well in a vertical orientation and can discriminate between right and left hand circular polarisation, making it ideal for personal navigation device and other global positioning system applications.
摘要:
There is disclosed an antenna device comprising a pair of physically and electrically symmetrical radiating elements configured for cooperative operation as a balanced antenna, and a third radiating element configured for operation as an unbalanced antenna The balanced antenna may be configured for operation in a first frequency band, and the unbalanced antenna may be configured for operation in a second frequency band Embodiments of the disclosed antenna device provide multiband operation close to a conductive groundplane and are strongly resistant to detuning.
摘要:
There is disclosed an antenna device made up of at least first, second and third conductive metal plates arranged in a parallelepiped configuration. The third plate defines a lower plane and the first and second plates together define an upper plane substantially parallel to the lower plane. The first and second plates are separated by a slot in the upper plane, and the second and third plates are connected to each other by a grounding connection. The first plate comprises a first, active antenna arm that is provided with a feed connection, and the second plate comprises a second antenna arm that may be passive or active. The antenna device generates a circularly polarized radiation pattern that is good for personal navigation devices, while being significantly more compact than existing ceramic patch antennas that are typically used in these devices.
摘要:
There is disclosed a multiple-input multiple-output (MIMO) antenna system comprising first and second folded or compacted loop antennas (12, 121). The antennas each have a longitudinal extent and are mounted substantially parallel to each other on a dielectric substrate (3) having a conductive groundplane (31, 32). The groundplane extends between the first and second antennas, and the first and second antennas are mounted on the substrate in areas where there is no groundplane. The first and second antennas, in use, generate first and second radiation patterns (31, 32) and also cause currents (30) to flow in the groundplane between the antennas so as to skew the first and second radiation patterns relative to each other by an angle greater than zero, and preferably at an angle of around 50 degrees.
摘要:
There is disclosed a multiple-input multiple-output (MIMO) antenna system comprising first and second folded or compacted loop antennas (12, 121). The antennas each have a longitudinal extent and are mounted substantially parallel to each other on a dielectric substrate (3) having a conductive groundplane (31, 32). The groundplane extends between the first and second antennas, and the first and second antennas are mounted on the substrate in areas where there is no groundplane. The first and second antennas, in use, generate first and second radiation patterns (31, 32) and also cause currents (30) to flow in the groundplane between the antennas so as to skew the first and second radiation patterns relative to each other by an angle greater than zero, and preferably at an angle of around 50 degrees.