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Is it technically feasible to design an antenna with two main lobes at 0° and 180°?

In antenna radiation theory, most designs aim for a single dominant main lobe or a controlled beam pattern. I am interested in understanding whether having two equal main lobes in exactly opposite directions is feasible, under what conditions this occurs, and how such patterns are interpreted in antenna analysis and applications.

 

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By Rutuja Ingole Answered 1 year ago


From my experience working with both classical and array-based antenna designs, I have seen that dual main lobes at 0° and 180° are not only feasible but quite common. Simple dipole and slot antennas naturally produce bidirectional patterns due to symmetry and the absence of a ground plane. I would recommend viewing this not as a design flaw but as a consequence of field cancellation and reinforcement. In more advanced arrays, engineers can intentionally shape equal and opposite beams through excitation symmetry. The real challenge is controlling sidelobes and ensuring both main lobes meet performance requirements simultaneously.
 

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