A New Method for Implementing Frequency Independent Beam Pointing Direction of Waveguide Slot Array Antenna

A new method-unequal electrical path length feed method-has been developed to implement frequency independent beam pointing direction for waveguide slot array antenna. Tbe aerial made with this method is simpler, smaller and lighter, compared to those made with equal electrical path length feed method. It is also more reliable and easier to manufacture with good electric performance. Normal equal electrical path length feed method can be viewed as a special case of this new method.