Which radar uses separate transmit and receive antennae?

Which radar uses separate transmit and receive antennae?

• A. Continuous Wave (CW) radar
• B. Pulsed radar
• C. Synthetic Aperture Radar
• D. Frequency Modulated CW radar

Answer: (A)

Continuous wave radar relies on detecting Doppler shifts to measure relative velocity, so it needs to keep the transmitted signal from overwhelming the receiver. Using separate transmit and receive antennas provides clean isolation between the strong outgoing wave and the faint echoes coming back, making it possible to detect the Doppler beat frequency accurately. This separation is a common arrangement for CW systems to avoid self-interference and to simplify the receiver design. Other radar types can share an antenna and use duplexing or switching to protect the receiver, so the distinct transmit/receive path isn’t a universal requirement for them, but it is a defining feature of CW radar setups.

Continuous wave radar relies on detecting Doppler shifts to measure relative velocity, so it needs to keep the transmitted signal from overwhelming the receiver. Using separate transmit and receive antennas provides clean isolation between the strong outgoing wave and the faint echoes coming back, making it possible to detect the Doppler beat frequency accurately. This separation is a common arrangement for CW systems to avoid self-interference and to simplify the receiver design. Other radar types can share an antenna and use duplexing or switching to protect the receiver, so the distinct transmit/receive path isn’t a universal requirement for them, but it is a defining feature of CW radar setups.