Foldable wireless electronic devices that communicate wirelessly are provided that can attenuate the cavity modes created when the devices are folded. The electronic devices may utilize prescribed housing dimensions, ohmic contacts, and capacitive coupling to attenuate the cavity modes. There may be minimal impact on the industrial design of the devices. The radiation efficiency and VSWR of the antennas of the electronic devices may not be degraded. Also, the frequency of the cavity modes may be controlled such that the cavity modes are resonated out of frequencies of interest, and the severity and occurrence of RF energy absorption may be attenuated or eliminated. Users of the foldable wireless electronic devices may have increased satisfaction as the devices may perform better while still having desirable aesthetics and appearance.