Narrow band wide angle scanning Two dimensional frequency diverse array radar

Narrow band space scanning two‐dimensional linear frequency diverse array radar

“…The time side lobes for RX can be further reduced by a pulse compression matched filtering during the demodulation. The intra‐pulse phase coding as described in [5] can be used. If the phase code is properly chosen no pulse compression is obtained but side lobes can be reduced.…”

“…The frequency diverse array (FDA) was first introduced in [1] and later the basic properties of the array were discussed in [2]. Since then more works have been carried out on FDA [3–6]. A uniformly spaced linear array fed with progressive frequency steps results in the well‐known FDA waveform, which depends on time, range, and angle.…”

“…However, in a pulse modulated FDA radar with periodic transmissions (TXs), the waveform visits all possible angles in the slow time. A 2D linear FDA ( and ) was proposed in [5] for scanning along a space trajectory. Here, we extend this idea to scan a wide 2D angular sector.…”

Space scanning FMCW‐based two‐dimensional frequency diverse array radar

“…The FDA effect was obtained by applying a linear frequency modulation (LFM) chirp signal to the elements of a linear uniform array by progressive physical time delays , which was restricted to small values to reduce the size of the transmission (TX) lines. For space scanning, a two‐dimensional (2D) linear FDA [4] was considered where the antenna beam scans, in particular, space trajectories. Here, we propose to use a hybrid direct digital synthesis (DDS) FMCW‐based FDA to scan a 2D angular space.…”