Write any two differences between slot antenna and its complementary dipole antenna.

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13. Write any two differences between slot antenna and its complementary dipole antenna.

(i) First, the electric and magnetic fields are interchanged. In case of the dipole antenna the electric lines are horizontal while the magnetic lines form loops in the vertical plane. But in case of slot antenna, the magnetic lines are horizontal and the electric lines are vertical. The electric lines are built up across the narrow dimensions of the slot. As a result, the polarization of the radiation produced by a horizontal slot is vertical and vertical slot is horizontal.

(ii) Second, the direction of the lines of electric and magnetic force abruptly reverse from one side of the metal sheet to the other. In case of the dipole, the electric lines have the same direction while the magnetic line forms continuous loops.

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