Antenna apparatus, vehicle having the antenna apparatus, and method for controlling the antenna apparatus
An antenna apparatus includes an omni-directional antenna for omni-directionally transmitting or receiving a signal, and a directional antenna module including a plurality of directional antennae having different radiation angles, wherein each of the directional antennae includes a feed unit to provide a signal, at least one waveguide through which the provided signal is propagated, and at least one radiation slot designed to radiate the signal propagated through the waveguide.
1. An antenna apparatus comprising:
an omni-directional antenna for omni-directionally transmitting or receiving a signal; and
a directional antenna module including a plurality of directional antennae having different radiation angles,
wherein each of the directional antennae includes a feed unit to provide a signal, at least one waveguide through which the provided signal is propagated, and at least one radiation slot designed to radiate the signal propagated through the waveguide; and
wherein the directional antenna module includes:
a top plate;
a bottom plate; and
a plurality of barriers disposed between the top plate and the bottom plate so as to form a plurality of waveguides.
2. The antenna apparatus according to claim 1 , wherein the plurality of directional antennae receive electricity, independently of each other.
3. The antenna apparatus according to claim 1 , further comprising:
an antenna selection switch for selectively providing electricity to at least one of the plurality of directional antennae.
4. The antenna apparatus according to claim 3 , further comprising:
a controller for determining a directional antenna corresponding to the position of a communication object from among the plurality of directional antennae.
5. The antenna apparatus according to claim 4 , wherein the controller transmits a control signal to the antenna selection switch in such a manner that electricity is supplied to the directional antenna corresponding to the position of the communication object.
6. The antenna apparatus according to claim 4 , wherein the omni-directional antenna is always ready to receive a signal from the communication object.
7. The antenna apparatus according to claim 6 , wherein the controller determines the position of the communication object on the basis of positional information contained in the signal received by the omni-directional antenna.
8. The antenna apparatus according to claim 7 , wherein the position information includes global positioning system (GPS) information.
9. The antenna apparatus according to claim 7 , wherein the controller determines the position of the communication object whenever the controller receives a signal from the communication object.
10. The antenna apparatus according to claim 6 , wherein the controller switches on the plurality of directional antennae when the omni-directional antenna receives the signal.
11. The antenna apparatus according to claim 10 , wherein the controller determines the position of the communication object on the basis of the directional antenna having received the signal from among the plurality of directional antennae.
12. The antenna apparatus according to claim 11 , wherein the controller switches off the directional antenna that has received no signal.
13. The antenna apparatus according to claim 12 , wherein:
the controller determines whether the position of the communication object is changed on the basis of an intensity of a signal received by the switched-on directional antenna, and the controller switches on the plurality of directional antennae when the position of the communication object is changed.
14. The antenna apparatus according to claim 12 , wherein:
the controller determines whether the position of the communication object is changed on the basis of a signal received by the directional antenna, and switches on another directional antenna adjacent to the directional antenna having received the signal when the position of the communication object is changed.
15. The antenna apparatus according to claim 5 , wherein:
if a distance to the communication object is a short distance equal to or less than a reference distance, the controller controls the antenna selection switch to communicate with the communication object using the omni-directional antenna.
16. The antenna apparatus according to claim 1 , wherein the plurality of waveguides is classified into a plurality of groups, and the plurality of groups corresponds to the plurality of directional antennae.
17. The antenna apparatus according to claim 16 , further comprising:
a common ground unit located below the directional antenna module, wherein the feed unit contained in the plurality of directional antennae is connected to the common ground unit.
18. A vehicle comprising:
an omni-directional antenna for omni-directionally transmitting or receiving a signal; and
a directional antenna module including a plurality of directional antennae having different radiation angles,
wherein each of the directional antennae includes a feed unit for providing a signal; at least one waveguide through which the provided signal is propagated; and at least one radiation slot for radiating the signal propagated through the waveguide; and
wherein the directional antenna module includes:
a top plate;
a bottom plate; and
a plurality of barriers disposed between the top plate and the bottom plate so as to form a plurality of waveguides.
19. The vehicle according to claim 18 , further comprising:
an antenna selection switch for selectively providing electricity to at least one of the plurality of directional antennae.
20. The vehicle according to claim 19 , further comprising:
a controller for determining a directional antenna corresponding to the position of a communication object from among the plurality of directional antennae, and
transmitting a control signal to the antenna selection switch in such a manner that electricity is supplied to the directional antenna corresponding to the position of the communication object.
21. The vehicle according to claim 20 , wherein the omni-directional antenna is always ready to receive a signal from the communication object.
22. The vehicle according to claim 21 , wherein the controller determines the position of the communication object on the basis of positional information contained in the signal received by the omni-directional antenna.
23. The vehicle according to claim 22 , wherein the controller switches on the plurality of directional antennae when the omni-directional antenna receives the signal.
24. The vehicle according to claim 23 , wherein the controller determines the position of the communication object on the basis of the directional antenna having received the signal from among the plurality of directional antennae.
25. The vehicle according to claim 23 , wherein the controller switches off the directional antenna that has received no signal.
26. The vehicle according to claim 25 , wherein:
the controller determines whether the position of the communication object is changed on the basis of an intensity of the signal received by the directional antenna, and switches on the plurality of directional antennae when the position of the communication object is changed.
27. A method for controlling an antenna apparatus, comprising:
receiving, by an omni-directional antenna staying in a standby mode, a signal from a communication object,
wherein if the omni-directional antenna receives the signal, determining a directional antenna corresponding to a position of the communication object from among a plurality of directional antennae; and
communicating with the communication object by switching on the determined directional antenna; and
wherein the directional antenna module includes:
a top plate;
a bottom plate; and
a plurality of barriers disposed between the top plate and the bottom plate so as to form a plurality of waveguides.
28. The method according to claim 27 , wherein the step for determining the directional antenna corresponding to the position of the communication object includes:
using positional information of the communication object contained in the received signal.
29. The method according to claim 27 , further comprising:
determining the position of the communication object when receiving the signal from the communication object.
30. The method according to claim 29 , further comprising:
if the position of the communication object is changed, switching on a directional antenna corresponding to the changed position from among the plurality of directional antennae.
31. The method according to claim 27 , wherein the step for determining the directional antenna corresponding to the position of the communication object includes:
switching on the plurality of directional antennae; and
determining a directional antenna having received the signal from among the plurality of directional antennae to be a directional antenna corresponding to the position of the communication object.
32. The method according to claim 30 , further comprising:
switching off a directional antenna that has received no signal from among the plurality of directional antennae.
33. The method according to claim 31 , further comprising:
determining whether the position of the communication object is changed on the basis of an intensity of the signal received by the switched-on directional antenna; and
if the position of the communication object is changed, switching on the plurality of directional antennae.