Anatomy Of Weather Radar - Furuno WR2120 Installation Manual

1.2.

Anatomy of Weather Radar

Sub reflector
Receiver
Antenna: The main purpose of the antenna is to focus the transmitted power into a narrow pencil
beam and also to receive and collect the returned signal.
Radome: Protects the antenna from high winds, dusts, and rain.
Sub reflector: Directs the signal from the transmitter onto the antenna and also directs the return
signal from the antenna to the receiver.
Receiver: Detects the signal returned from a target.
Transmitter: Generates the microwave signal at the correct phase and amplitude. For X-band
weather radar, the wavelength of the signal is approximately 3 cm.
Primary
reflector
Feed
antenna
Supports
Axial-feed
Radome
Antenna
Transmitter
Off-axis or
Offset-feed
Figure 1.2: Antenna Type
2
Concave
secondary
reflector
Cassegrain
70km
Concave
secondary
reflector
Gregorian