Double helical waveguide feed with linear slot array for frequency scanning

Claim 1

AN AERIAL SYSTEM FOR RADIATING A PAIR OF SIMILAR AND PARITALLY OVERLAPPING BEAMS OF CONCENTRATED HIGH FREQUENCY FIELD ENERGY, SAID AERIAL SYSTEM COMPRISING A FIRST GROUP OF LONGITUDINALLY SPACED APART TURNS OF FIRST WAVEGUIDE MEANS ABOUT A LINE, A SECOND GROUP OF LONGITUDINALLY SPACED APART TURNS OF SECOND WAVEGUIDE MEANS ABOUT SAID LINE, THE TURNS OF SAID SECOND GROUP BEING POSITIONED BETWEEN ADJACENT TURNS OF SAID FIRST GROUP, WHEREBY THE TURNS OF SAID FIRST AND SECOND WAVEGUIDE MEANS ALTERNATE LONGITUDINALLY OF SAID AERIAL SYSTEM, A SLOT IN THE SURFACE OF EACH TURN OF SAID WAVEGUIDE MEANS AWAY FROM SAID LINE, SAID SLOTS BEING ALIGNED TO FORM A SINGLE ROW OF SLOTS, THE LENGTH OF EACH TURN OF SAID WAVEGUIDE MEANS BEING GREATER THAN THE DIRECT DISTANCE BETWEEN ADJACENT SLOTS OF THE RESPECTIVE WAVEGUIDE MEANS, AND MEANS PROVIDING A DIFFERENCE BETWEEN THE PHASE RELATIONSHIP OF HIGH FREQUENCY ENERGY BETWEEN ADJACENT SLOTS OF SAID FIRST WAVEGUIDE MEANS AND THE PHASE RELATIONSHIP OF HIGH FREQUENCY ENERGY BETWEEN ADJACENT SLOTS OF SAID SECOND WAVEGUIDE MEANS.