![]() By increasing the number of elements (or sensors), the beam becomes sharper and more efficient in detecting smaller size targets. 2 The width of the beam depends on the number of elements in the array. Digital control of the module transmit/receive gain and timing permits the design of an antenna with beam steering agility, interleaving radar modes and extremely low sidelobes, which provides a significant reduction in antenna radar signature compared to passive electronically scanned arrays (ESA) and mechanically-steered antennas. Unlike a mechanically-steered radar, a phased array can rotate its pattern in space with practically no delay. Phase and amplitude control of the input signal to the individual elements provides steerable directivity of the antenna beam over both azimuth and elevation, which allows the radar to “aim” the main lobe of the antenna in the desired direction. Related ResourcesĪn AESA radar, also known as an active phased array radar (APAR), consists of individual radiating elements (antennas), each with a solid-state T/R module containing a low noise receiver, PA and digitally-controlled gain and phase (or delay) elements. This article will discuss these technology trends and present several examples where advances in EDA tools are supporting next-generation AESA and phased array radar development. 1īehind these development efforts are a host of evolving electronic design automation (EDA) technologies that support designers with system architecture, component specifications, physical design of individual components and verification prior to prototyping. These radar payloads are driving size and performance requirements, which are being addressed through novel architectures and system capabilities made possible through improvements in microwave and signal processing technologies such as GaN power amplifiers (PA), new monolithic microwave integrated circuits (MMIC) and “extreme” MMIC devices, heterogeneous “more than Moore” integration, cost reductions for transmit/receive (T/R) modules, new millimeter wave (mmWave) silicon ICs and electro-optic integration. ![]() These payloads, along with updated ground, airborne and shipborne radar, will help military planners meet changing operational requirements and the need for better situational awareness through improved intelligence, surveillance and reconnaissance (ISR) systems. Recent trends in active electronically scanned arrays (AESA) are targeting new radar payloads for satellites and unmanned aerial vehicles (UAV). ![]()
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