Radar apparatus and method manufacturing the same

1. A radar apparatus comprising:

a printed circuit board having a top side, on which a radar antenna unit having a plurality of long-distance transmission array antennas and an RF circuit unit are mounted, and

a bottom side, on which a base band circuit unit and a signal processing circuit unit are mounted;

a base plate coupled to the printed circuit board; and

a protective member coupled to the top side of the printed circuit board to cover the RF circuit unit in order to protect the RF circuit unit; and

a power divider configured to divide a power to each of the plurality of long-distance transmission array antennas such that a highest power is applied to a long-distance transmission array antenna arranged at a center of the plurality of long-distance transmission array antennas and the supplied power decreases as approaching the opposite sides from the long-distance transmission array antenna arranged at the center,

wherein the top side of the printed circuit board comprises a first portion on which the radar antenna unit is mounted, and a second portion on which the RF circuit unit is wire bonded and mounted,

wherein the protective member covers only the second portion,

wherein all the plurality of long-distance transmission array antennas have the same physical length, or one or more long-distance transmission array antennas among the plurality of long-distance transmission array antennas have different physical lengths, and

wherein when the one or more long-distance transmission array antennas have the different physical lengths, the long-distance transmission array antenna arranged at the center has the longest physical length and the physical lengths of the remaining long-distance transmission array antennas decrease as approaching the opposite sides.

2. The radar apparatus of claim 1 , wherein the protective member is formed with a groove that serves as a passage of a wire for connecting the radar antenna unit and the RF circuit unit mounted on the top side of the printed circuit board.

3. The radar apparatus of claim 1 , wherein the base band circuit unit converts an analog signal output from the RF circuit unit into a digital signal and inputs the digital signal to the signal processing circuit unit, or converts a digital signal output from the signal processing circuit unit into an analog signal, and inputs the analog signal to the RF circuit unit.

4. The radar apparatus of claim 1 , wherein one end of the RF circuit unit is connected with the radar antenna unit, and the other end of the RF circuit unit is connected with the base band circuit unit.

5. The radar apparatus of claim 1 , wherein, the RF circuit unit mounted on the top side of the printed circuit board is seated on the base plate through a hole formed in the printed circuit board.

6. The radar apparatus of claim 5 , wherein the base plate is formed with a protrusion to allow the RF circuit unit to be seated thereon.

7. The radar apparatus of claim 1 ,

wherein the radar antenna unit mounted on the first portion comprises the plurality of long-distance transmission array antennas, one or more short-distance transmission array antennas, and a plurality of reception array antennas.

8. The radar antenna of claim 7 , wherein the RF circuit unit is implemented as a transmission integrated circuit chip and reception integrated circuit chips.

9. The radar antenna of claim 8 , wherein the transmission integrated circuit chip is connected with the each of the plurality of long-distance transmission array antennas and the one or more short-distance transmission array antennas, and the reception integrated circuit chips are connected with each of the plurality of reception array antennas.

10. The radar antenna of claim 9 , wherein the transmission integrated circuit chip and the reception integrated circuit chips are connected with the power divider, the one or more short-distance transmission array antennas, and the plurality of reception array antennas.

11. The radar apparatus of claim 1 , wherein the radar antenna unit includes ten long-distance transmission array antennas.