Electromagnetic Analysis and Experimental Validation of the LOFAR Radiation Patterns

Figure 10

Measured and simulated array voltages at different loading conditions for LBA-inner array. Frequencies: (a) 57 and (b) 70 MHz. The top graphs show the array pattern computed through measurements (grey dashed curve), simulations loaded on the nominal LNA impedance (black continuous curve), and simulations loaded on 50 Ω (grey continuous curve). The bottom graphs show the linear differences between the measured and the two simulated patterns.

(a)

(b)