The purpose of an automotive radar is to locate objects like pedestrians and vehicles, close to the surrounding area of the car. This particular radar comprises of a receiver and a transmitter. Among these, the transmitter delivers the radio waves which strike an object and rebounds to be extracted by the receiver. With the controlling of direction in which the radio waves are transmitted and captured it is quite possible to spot the objects' distance, direction and speed.
Types of Automotive Radars
Automotive radars are classified into three prime types; namely, short range radars, medium range radars and long range radars.
- Long range radars are implemented for computing the distance as well as speed of other automobiles.
- Medium range radars are majorly used to detecting objects that are present in a wider view arena, for example- cross traffic alert structures.
- The application of short range radars is focused at sensing objects in the vicinity of the car. It is perfect for helping in parking assistance.
Based on the application, the requirement for these radars do differ. In case of short range applications, there is a need for a steerable antenna that has a greater scanning angle. This helps in generating a wide view arena. Whereas, long range applications need more directive antennas which offer a higher resolution contained by a certain restricted scanning range. The overall automotive radar market is highly advance in the present time with the significant manufacturing of vehicles at the global level.
Diverse Frequency Bands for Radar Functioning
For the operation of automotive radars there are two frequency bands which are usually preferred, which are 24 GHz band and 77 GHz band. It has been tested and analyzed that 77 GHz band delivers higher performance. On the other hand, the 24 GHz automotive radars are much simpler to develop. Their larger size is the only issue which makes them difficult to incorporate in a vehicle.
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