The radar type that uses separate transmit and receive antennae is?

The radar type that uses separate transmit and receive antennae is?

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

Answer: (D)

Continuous wave radar fits this because it transmits continuously and relies on detecting the Doppler shift from moving targets. The transmitter’s strong signal can easily overwhelm the receiver, so separating the transmit and receive paths with two antennas provides clear isolation, letting the receiver pick up only the weak reflected signal. This bistatic-style arrangement (tx and rx on different antennas) helps obtain clean Doppler information. Pulsed radar often shares a single antenna with a duplexer and gates the receiver between pulses, so separate TX/RX isn’t required by definition. Frequency Modulated CW uses a swept signal but typically uses the same path for transmission and reception and derives range from the beat frequency, not from needing separate antennas. SAR focuses on forming an image from motion and can use various antenna configurations, not inherently defined by TX/RX separation.

Continuous wave radar fits this because it transmits continuously and relies on detecting the Doppler shift from moving targets. The transmitter’s strong signal can easily overwhelm the receiver, so separating the transmit and receive paths with two antennas provides clear isolation, letting the receiver pick up only the weak reflected signal. This bistatic-style arrangement (tx and rx on different antennas) helps obtain clean Doppler information.

Pulsed radar often shares a single antenna with a duplexer and gates the receiver between pulses, so separate TX/RX isn’t required by definition. Frequency Modulated CW uses a swept signal but typically uses the same path for transmission and reception and derives range from the beat frequency, not from needing separate antennas. SAR focuses on forming an image from motion and can use various antenna configurations, not inherently defined by TX/RX separation.