In phased array radar, which mechanism causes grating lobe formation?

💡 Explanation

Grating lobes appear when the element spacing exceeds half the wavelength because spatial aliasing creates ambiguous beam directions. The **spatial sampling theorem** is violated, therefore higher order replicas are amplified, rather than main lobe dominance under Nyquist conditions.

• Within supercritical CO2 power cycles, which risk increases when pump cavitation occurs?
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• Which mechanism ensures stable yaw control despite engine failure?
• Which hazard is enhanced when hydraulic actuator seals shear?
• Which outcome is LEAST likely by using feedforward control in high-speed hydraulic actuators?
• Which limitation arises when increasing proportional valve gain in hydraulic actuator position control systems?