Antenna for controlling a beam direction both in azimuth and elevation
First Claim
1. An antenna configured to steer a beam both in azimuth and elevation, comprising:
- a ground plane;
at least one active element for radiating a radio beam, the active element being installed on top of the ground plane while electrically isolated from the ground plane; and
a plurality of passive elements disposed around the outer edge of the ground plane, each passive element comprising;
an upper half including a variable reactive load which connects the upper half to the ground plane; and
a lower half including a variable reactive load which connects the lower half to the ground plane, whereby elevation angle of the radio beam radiated from the antenna is controlled by adjusting the variable reactive loads.
1 Assignment
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Accused Products
Abstract
An antenna for controlling a beam direction both in azimuth and elevation is disclosed. An antenna comprises a ground plane, at least one active element, and a plurality of passive elements. Both an upper half and a lower half of the passive elements are connected to the ground plane with variable reactive loads, whereby elevation angle of the radio beam is controlled by adjusting the variable reactive loads. Alternatively, an antenna may comprise a radio frequency (RF) choke coupled to the ground plane, whereby an elevation angle of the radio beam is controlled by controlling the RF choke. Alternatively, an antenna comprises a variable lens for changing a wave front of a radio wave which is passing through the variable lens, whereby the beam width and direction are controlled by the variable lens.
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Citations
30 Claims
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1. An antenna configured to steer a beam both in azimuth and elevation, comprising:
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a ground plane; at least one active element for radiating a radio beam, the active element being installed on top of the ground plane while electrically isolated from the ground plane; and a plurality of passive elements disposed around the outer edge of the ground plane, each passive element comprising; an upper half including a variable reactive load which connects the upper half to the ground plane; and a lower half including a variable reactive load which connects the lower half to the ground plane, whereby elevation angle of the radio beam radiated from the antenna is controlled by adjusting the variable reactive loads. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna comprising:
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a ground plane; an active element for radiating a radio beam, the active element being installed on top of the ground plane while electrically isolated from the ground plane; and a radio frequency (RF) choke disposed around the edge of the ground plane, whereby an elevation angle of the radio beam is controlled by controlling the RF choke. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An antenna assembly for steering a radio beam both in azimuth and elevation, comprising:
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an antenna for radiating a radio wave; and a variable lens for changing a wave front of the radio wave which passes through the variable lens, the variable lens comprising a plurality of radiating elements, each radiating element including a reactive load for controlling a phase delay, whereby the beam width of the radio wave is controlled by controlling the reactive load. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification