Antenna and method for steering antenna beam direction for wifi applications
An antenna comprising an IMD element and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements. Unique antenna architectures for beam steering in Wi-Fi band applications is further described.
1. An antenna assembly, comprising:
a radiating element positioned above a ground plane forming an antenna volume therebetween;
one or more parasitic elements positioned adjacent to the radiating element and outside of the antenna volume; and
at least one of:
an active component configured to couple one of the parasitic elements to said ground plane,
an active module configured to couple one of the parasitic elements to said ground plane, or
a combination thereof;
wherein the antenna assembly is configured with one or more resonances, said resonances including one or more resonances in the 2.4 GHz band, one or more resonances in the 5 GHz band, or a combination thereof.
2. The antenna assembly of claim 1 , said parasitic element comprising a first portion and a second portion, wherein the second portion is coupled to the first portion at a lumped inductor.
3. The antenna assembly of claim 1 , one of said parasitic elements being coupled to the ground plane via an active component therebetween, the active component including one of: a switch, tunable capacitor, tunable inductor, variable resistor, or tunable phase shifter.
4. The antenna assembly of claim 1 , one of said parasitic elements being coupled to the ground plane via an active module, the active module including: a multi-port switch, a micro-controller, or a combination thereof.
5. The antenna assembly of claim 4 , wherein a distinct load is associated with each port of the multi-port switch.
6. The antenna assembly of claim 1 , including a first parasitic element and a second parasitic element.
7. The antenna assembly of claim 6 , wherein each of said first and second parasitic elements is positioned on one of two opposite sides of the antenna radiating element.
8. The antenna assembly of claim 6 , wherein each of said first and second parasitic elements is individually coupled to the ground plane via at least one of: an active component, an active module, or a combination thereof.
9. The antenna assembly of claim 8 , comprising a first active module and a second module, the first active module being associated with the first parasitic element, and the second module being associated with the second parasitic element for varying a mode of the antenna.
10. The antenna assembly of claim 9 , wherein at least one of the active modules comprises a single pole four throw switch.
11. The antenna assembly of claim 1 configured on a substrate to form an antenna module.