Radar works by emitting radio waves from a transmitter, which travel through the air until they encounter an object. These waves bounce off the object and return to the radar receiver. By measuring the time it takes for waves to travel toward the object and back, radar systems can calculate the distance to the object. Additionally, radar systems analyze the frequency shift (Doppler shift) of the returned waves to determine the speed of the object and use the direction of the antenna to determine the object’s location relative to the radar. This information is processed and displayed to provide information about the presence, location and movement of objects within the radar’s range.
A radar sensor works by transmitting electromagnetic waves from an antenna and receiving echoes reflected off objects within its coverage area. The sensor emits short pulses of radio frequency energy, which travel outward in all directions. When these pulses encounter an object, they are reflected back to the radar. The radar’s receiver detects these reflected signals, measuring the delay between transmission and reception to determine the distance to the object. By analyzing the frequency shift of the returned signals (Doppler shift), the radar sensor can also determine the speed and direction of movement of the object. This continuous process of transmitting pulses, receiving echoes and analyzing data allows radar sensors to detect and track objects over short or long distances, depending on their design and application.
The search radar works by scanning a large area or volume of space with its antenna in a systematic pattern. This scanning can be done mechanically, where the antenna physically rotates to scan the area, or electronically (as in phased array radar), where the direction of the beam is steered electronically without moving parts. The radar emits pulses of electromagnetic energy and listens for echoes reflected from potential targets. By analyzing the time it takes for the pulses to return and the Doppler changes in the reflected signals, the search radar can detect and locate objects within its coverage area. Search radar systems are commonly used for air traffic control, weather monitoring, military surveillance and other applications where wide coverage and detection of multiple targets is essential.