The present disclosure provides an antenna and a communication device, the antenna includes a dielectric substrate, a first radiating element, a second radiating element and a switching element, the second radiating element surrounds the first radiating element, the second radiating element is of an open-loop structure, at least one first groove is provided in the first radiating element, each switching element corresponds to one first groove, the switching element includes a membrane bridge and a signal electrode, the signal electrode is arranged on the dielectric substrate, coupled to the second radiating element, and insulated from the first radiating element, the membrane bridge is arranged on a side of the first radiating element away from the dielectric substrate, each membrane bridge crosses over one first groove, and at least part of the signal electrode is located in a space defined by the membrane bridge and the first groove.