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The radar mile is the time it takes for a radar pulse to travel one nautical mile, reflect off a target, and return to the radar antenna. Since a nautical mile is defined as 1,852 m, then dividing this distance by the speed of light (299,792,458 m/s), and then multiplying the result by 2 yields a result of 12.36 μs in duration.
Diagram of a typical 2D radar rotating cosecant squared antenna pattern. Diagram of a typical 3D radar, a judicious mix of vertical electronic beam steering and mechanically horizontal movement of a pencil-beam. Steered beam radars steer a narrow beam through a scan pattern to build a 3-D picture.
In radar applications, this kind of phased array is physically moved during the track and scan process. There are two configurations. Multiple frequencies with a delay-line; Multiple adjacent beams; The SPS-48 radar uses multiple transmit frequencies with a serpentine delay line along the left side of the array to produce vertical fan of ...
Typical RCS diagram (A-26 Invader) Radar cross-section (RCS), denoted σ, also called radar signature, is a measure of how detectable an object is by radar. A larger RCS indicates that an object is more easily detected. [1] An object reflects a limited amount of radar energy back to the source. The factors that influence this include: [1]
The diagram on the left shows the effect on the spectrum if a trapezoid pulse profile is adopted. It can be seen that the energy in the sidebands is significantly reduced compared to the main lobe and the amplitude of the main lobe is increased. Radar transmission frequency spectrum of a cosine pulse profile
This image is a derivative work of the following images: File:Radar-beam.png licensed with Cc-by-sa-3.0-migrated, GFDL . 2006-05-08T15:25:05Z Pierre cb 395x269 (8788 Bytes) Diagram showing the enlargement of the radar beam with distance as it has an angular opening.
Radar engineering is the design of technical aspects pertaining to the components of a radar and their ability to detect the return energy from moving scatterers — determining an object's position or obstruction in the environment.
The axis of maximum radiation, passing through the center of the main lobe, is called the "beam axis" or boresight axis". In some antennas, such as split-beam antennas, there may exist more than one major lobe. The other lobes beside the main lobe, representing unwanted radiation in other directions, are called minor lobes.