Detection and Reduction of EMC Problems in Microwave Antenna Feed Elements

The paper considers several spread internal EMC problems, which take place in some microwave passive non-antenna devices – parasitic radiation, “high-altitude” fields, crosstalk, grounding inefficiency, etc. Near-field scanning combined with electromagnetic simulations have been used for their prediction and detection. Several design rules have been discussed to avoid these problems in the multi-layer antenna arrays up to Ka band.