Method and apparatus for controlling radiation direction of small sector antenna
First Claim
1. An apparatus for controlling a radiation direction of a small sector antenna including a single radio frequency (RF) port and an array of a plurality of parasitic elements, the apparatus comprising:
- a plurality of capacitance blocks matched to the plurality of parasitic elements in a one-to-one manner and each respectively including a preset number of capacitors commonly connected to corresponding parasitic elements and each having a different capacitance;
a plurality of switching units matched to the plurality of capacitance blocks in a one-to-one manner and including a plurality of selective contact points connected to the other ends of the capacitors of the corresponding capacitance blocks and a fixed contact point connected to a ground, and performing a switching operation such that the fixed contact point is connected to one of the plurality of selective contact points; and
a controller controlling the plurality of switching units, and, wherein the preset number of capacitors is n=Ns/2+1 number of capacitors, where Ns is a preset number of sectors in the small sector antenna.
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Accused Products
Abstract
Disclosed are an apparatus and method for controlling a radiation direction of a small sector antenna, used for a small wireless transmission device having limited power and calculation capabilities, capable of operating at a low power consumption with the necessity of simple calculation capabilities or without the necessity of even a few calculation capabilities. The apparatus for controlling a radiation direction of a small sector antenna includes a plurality of capacitance blocks including a plurality of capacitors each having one end commonly connected to corresponding parasitic elements and having a different capacitance. Capacitors having a capacitance corresponding to a radiation direction are selectively connected to corresponding parasitic elements through a plurality of switching units and a controller, thereby simplifying controlling and reducing power consumption for controlling the radiation direction.
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Citations
6 Claims
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1. An apparatus for controlling a radiation direction of a small sector antenna including a single radio frequency (RF) port and an array of a plurality of parasitic elements, the apparatus comprising:
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a plurality of capacitance blocks matched to the plurality of parasitic elements in a one-to-one manner and each respectively including a preset number of capacitors commonly connected to corresponding parasitic elements and each having a different capacitance; a plurality of switching units matched to the plurality of capacitance blocks in a one-to-one manner and including a plurality of selective contact points connected to the other ends of the capacitors of the corresponding capacitance blocks and a fixed contact point connected to a ground, and performing a switching operation such that the fixed contact point is connected to one of the plurality of selective contact points; and a controller controlling the plurality of switching units, and, wherein the preset number of capacitors is n=Ns/2+1 number of capacitors, where Ns is a preset number of sectors in the small sector antenna. - View Dependent Claims (2, 3, 4)
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5. A method for controlling a radiation direction of a small sector antenna including a single RF port and an array of a plurality of parasitic elements, the method comprising:
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dividing a radiation direction of the small sector antenna into a plurality of sectors and setting the same; disposing a plurality of capacitors between the plurality of parasitic elements and grounds; and selectively connecting the capacitors between the respective parasitic elements and the grounds such that parasitic elements located at symmetrical sectors, based on a selected radiation direction, have the same capacitance and parasitic elements located at sectors in a radiation direction have mutually different capacitances, wherein the plurality of capacitors is preset to n=Ns/2+1 number of capacitors, where Ns is a preset number of sectors in the small sector antenna.
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6. A method for controlling a radiation direction of a small sector antenna including a single RF port and an array of n parasitic elements, the method comprising:
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dividing a radiation direction of the small sector antenna into n sectors; disposing between each respective of the plurality of parasitic elements and ground n/2+1 different valued capacitors; and selectively connecting the capacitors between the respective parasitic elements and ground such that parasitic elements located at symmetrical sectors, based on a selected radiation direction, have the same capacitance and parasitic elements located at sectors in a radiation direction have mutually different capacitances.
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Specification