During operation of a frequency hopping (FH) radar the frequency carrier is actively shifted within a predefined frequency range. In case of a pulsed FH SRR the hopping is intermittent, resulting in an instantaneous frequency spread that is inversely proportional to the pulse-width.

Typical operational parameters of a pulsed FH SRR are listed in Table 3.

A typical pulse width of 25 ns results in an instantaneous carrier frequency spread of 40 MHz. By further hopping with the carrier over a frequency span of 960 MHz a total occupied bandwidth of 1 GHz is achieved. The emission pattern of a pulsed FH SRR is of box-shape form and shown in Figure 3.

Figure 3: Pulsed FH SRR pattern (time-averaged)