Structure and alignment method of array antennas for vehicle radar
Provided are a structure and alignment method of array antennas for a vehicle radar, the structure and method being able to adjust the locations, number of channels, number of arrays, and channel distance according to the type of antennas, so as to minimize a space occupied by the antennas while maintaining the radiation efficiency of the antennas. Even in a case in which conditions regarding the location of the array antennas and the number of channels are changed within designated ranges, the efficient array antenna structure minimizes the area of array antennas for a vehicle while maintaining the detection ability of the array antennas.
1. An array antenna structure for a vehicle radar, comprising:
a short range receiver antenna;
a short range transmitter antenna split into sections disposed to left and right of outside of the short range receiver antenna, respectively;
a long range transmitter antenna split into sections disposed to left and right of outside of the short range transmitter antenna, respectively; and
a long range receiver antenna disposed to left of the left section of the long range transmitter antenna or to right of the right section of the long range transmitter antenna.
2. The array antenna structure according to claim 1 , wherein the short range receiver antenna includes a plurality of channels having an equal distance or a predetermined specific distance and a distance set as a multiple of the specific distance.
3. The array antenna structure according to claim 2 , wherein short range receiver antenna is configured such that a single array antenna is disposed for each of the channels.
4. The array antenna structure according to claim 1 , wherein the short range transmitter antenna is configured such that a single channel is disposed to left of the outside of the short range receiver antenna and another single channel is disposed to right of the outside of the short range receiver antenna.
5. The array antenna structure according to claim 4 , wherein the short range transmitter antenna is configured such that a single array antenna is disposed for each of the channels.
6. The array antenna structure according to claim 1 , wherein the long range transmitter antenna is configured such that a single channel is disposed to left of the outside of the short range transmitter antenna and another single channel is disposed to right of the outside of the short range transmitter antenna.
7. The array antenna structure according to claim 6 , wherein the long range transmitter antenna is configured such that a single array antenna is disposed for each of the channels.
8. The array antenna structure according to claim 7 , wherein the number of array antennas per channel of the long range transmitter antenna is determined to be proportional to the number of channels of the short range receiver antenna.
9. The array antenna structure according to claim 8 , wherein the number of array antennas per channel of the long range transmitter antenna is greater than the number of channels of the short range receiver antenna by K.
10. The array antenna structure according to claim 8 , wherein the number of array antennas per channel of the long range transmitter antenna is greater than the number of channels of the short range receiver antenna by 2.
11. The array antenna structure according to claim 1 , wherein the long range receiver antenna includes a plurality of channels.
12. The array antenna structure according to claim 9 , wherein the number of array antennas per channel of the long range receiver antenna is determined to be a value obtained by dividing two times the number of array antennas per channel of the long range transmitter antenna with a value smaller than the number of channels of the long range receiver antenna by 1.
13. The array antenna structure according to claim 1 , wherein the long range transmitter antenna has a vertical offset.
14. The array antenna structure according to claim 1 , wherein the long range receiver antenna has a vertical offset.
15. The array antenna structure according to claim 14 , wherein, if the long range receiver antenna includes a plurality of channels, only the long range receiver antenna constituting one channel among the plurality of channels, located closest to or farthest from the long range transmitter antenna, has the vertical offset.
16. An array antenna alignment method for a vehicle radar, comprising:
disposing a short range receiver antenna;
disposing split sections of a short range transmitter antenna to left and right of outside of the short range receiver antenna, respectively;
disposing split sections of a long range transmitter antenna to left and right of outside of the short range transmitter antenna, respectively; and
disposing a long range receiver antenna to left of the left section of the long range transmitter antenna or to right of the right section of the long range transmitter antenna.
17. The array antenna alignment method according to claim 16 , wherein the short range receiver antenna includes a plurality of channels having an equal distance, with a single array antenna being provided for each of the channels.
18. The array antenna alignment method according to claim 16 , wherein the short range transmitter antenna is configured such that a single channel including a single array antenna is disposed to left of the outside of the short range receiver antenna and another single channel including a single array antenna is disposed to right of the outside of the short range receiver antenna.
19. The array antenna alignment method according to claim 16 , wherein the long range transmitter antenna is configured such that a single channel including a plurality of array antennas is disposed to left of the outside of the short range transmitter antenna and another single channel including a plurality of array antennas is disposed to right of the outside of the short range transmitter antenna.
20. The array antenna alignment method according to claim 16 , wherein the long range transmitter antenna has a vertical offset.