Notch radiator elements

An antenna array for high frequency signals comprising:

• a plurality of planar dielectric substrates;
• a conductive strip supported within each substrate;
• an elongated rigid member formed of a solid conductor having a plurality of machined recesses therein, each recess for receiving a corresponding substrate therein, said member having a machined aperture for each conductive strip for radiating signals;
• and
• a rigid conductive machined cover for each recess mounted in the recess and over the corresponding substrate in contact with the housing for enclosing the substrate and the conductive strip, said housing and cover having a pair of machined slots for each conductive strip forming a plurality of slot line transitions aligned with each corresponding aperture on opposite sides of each substrate in a direction transverse to a portion of the corresponding conductive strip and proximate thereto such that each slot line transition represents a discontinuity with respect to the conductive strip and signals carried thereby cause a field to be induced in the slots for coupling signals between each conductive strip and each corresponding aperture.