Abstract: The present disclosure provides an electronic device. The electronic device includes a first transceiving element, a second transceiving element disposed over the first transceiving element, and a radiating structure configured to radiate a first EM wave having a lower frequency and a second EM wave having a higher frequency. The first transceiving element and the second transceiving element are collectively configured to provide a higher gain or bandwidth for the first EM wave than for the second EM wave.

Abstract: A flap door mechanism with closable function includes a door member, a resilient member and a spring arm member. The door member is pivoted to a casing. The resilient member is installed on the door member and for driving the door member to rotate in a first direction. The resilient member includes a first end and a second end. The spring arm member is selectively disposed on the door member or on the casing. The spring arm member abuts against the first end. When the door member rotates in a second direction opposite to the first direction, the spring arm member is pushed to bend by the first end or is pressed to flatten by the casing, so as to reduce deformation between the first end and the second end of the resilient member.

Abstract: A flap door mechanism with closable function includes a door member, a resilient member and a spring arm member. The door member is pivoted to a casing. The resilient member is installed on the door member and for driving the door member to rotate in a first direction. The resilient member includes a first end and a second end. The spring arm member is selectively disposed on the door member or on the casing. The spring arm member abuts against the first end. When the door member rotates in a second direction opposite to the first direction, the spring arm member is pushed to bend by the first end or is pressed to flatten by the casing, so as to reduce deformation between the first end and the second end of the resilient member.