Abstract

In this paper, a novel substrate integrated waveguide (SIW) H-plane horn antenna with dynamically tunable graphene-based attenuator is first presented. The antenna is composed of the H-plane horn aperture, the matching transition and the graphene-based attenuator. By using external voltage, the surface impedance of graphene sheets can be changed dynamically. Correspondingly, the gain of antenna can be tuned from 3.045dB to −14.12dB at 17.7GHz. So the switchable horn antenna is in working state with the larger gain and no-working state with the lower gain by changing biased voltage.

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