A frequency hopping spread spectrum data link that works in the unlicensed frequency band of 2.2 GHz to 2.3 GHz, needs to be compliant with EMI/EMC Issues to reject or attenuate the unwanted input signals (interferences) and also preventing of spreading out spurs and harmonic signals. Because of unlicensed band and no affordable commercial filters, two types of microstrip band pass filters called hairpin and interdigital were designed, simulated and fabricated on FR4 substrate as application specific filters. The results showed achievement of needed performance. تفاصيل المقالة

Manned and unmanned fast crafts, like unmanned aerial vehicle (UAV), are of interested weapon systems and will be paid attention in future offensive and defensive doctrine. This novel case, needs innovation in different areas like armament, navigation, communication and especially electronic warfare. Communication, radar and optical electronic warfare subsystems are necessary for increasing survivability and success in future missions. In this article wee perform future study of electronic warfare subsystems for fast crafts. تفاصيل المقالة