Antenna Array for Passive Radar: Configuration Design and Adaptive Approaches to Disturbance Cancellation

Table 1

Symmetric configurations belonging to the different classes for 𝑁<10.

	Circle without central element	Circle with central element	Triangle without; central; element	Triangle; with; central; element	Square; without; central; element	Square; with; central; element	𝑌	𝑋
𝑁=3
𝑁=4
𝑁=5
𝑁=6
𝑁=7
𝑁=8
𝑁=9