Fourier Rotman Lens Enabled Directional Modulation Transmitter

Figure 13

Measured BER results for the cases of (a) DQPSK and (b) DBPSK information signals, which were applied at the 7th and the 9th beam ports of the Fourier Rotman lens, respectively and alternately. Interference with −∞, −5, or 0 dB magnitude and symbol rate updated random phases was injected into each of the remaining 12 beam ports. The SNR for each case was set to 13.8 dB and 9.2 dB.

(a)

(b)