Subelement A: RADAR Principles – 10 Key Topics – 10 Exam Questions – 8 Drawings— Topic 3: Frequency and Wavelength
Question 8-3A2
Element 8 (RADAR)Practical RADAR operation requires the use of microwave frequencies so that:
Explanation
Practical RADAR systems operate at microwave frequencies primarily because these shorter wavelengths allow for the use of highly directional antennas within a practical physical size. Concentrating the transmitted power into a very narrow beam ensures more energy illuminates the target. This focused energy, when reflected by the target, returns a stronger echo signal to the equally directional receiving antenna, thereby producing stronger target echoes and improving detection range and accuracy.
Options B, C, and D are incorrect. Ground clutter can often be *more* significant at microwave frequencies due to reflections from small ground objects. Interference to other systems is never eliminated, but rather managed through frequency allocation. Lastly, highly *directional* antennas are crucial for radar to pinpoint targets and concentrate power, not non-directional ones.
Related Questions
8-39E6 What is the most common type of RADAR antenna used aboard commercial maritime vessels?8-3A1 Frequencies generally used for marine RADAR are in the ___ part of the radio spectrum.8-3A3 An S-band RADAR operates in which frequency band?8-3A4 A RADAR operating at a frequency of 3 GHz has a wavelength of approximately:8-3A5 The major advantage of an S-band RADAR over an X-band RADAR is: