New Feeding Method for K-band Crossed Slot Antenna

A new feeding method of the crossed slot antenna is introduced in this paper. The crossed slot antenna consists of two identical rectangular parts slots positioned at the right angle, at the upper side of the substrate. It is fed by microstrip line on the opposite bottom substrate side without the influence on the desired radiation pattern of the slot antenna. This new method of feeding is compared with uniplanar feeding method by coplanar waveguide line (CPW). A new feeding method enables almost 2.5 times greater operating range of the crossed slot antenna, defined by S
11
parameter, than CPW feeding. Also, feeding by microstrip line has a potential advantage in design of crossed slot antenna arrays with incorporated tapered distribution requested for high gain antenna with low side lobe suppression, as well as scanning antennas with corresponding delay lines which are separated from radiating elements.