Wideband antenna and related radio-frequency device

摘要

A wideband antenna is disclosed. The wideband antenna includes a ground element electrically connected to a ground, a feed element for feeding in a Radio-Frequency signal, a radiation element electrically connected to the feed element for radiating the Radio-Frequency signal, and at least one meta-material structure electrically connected between the radiation element and the ground element.

主权项

1. A wideband antenna, comprising:
a ground element electrically connected to a ground; a feed element for feeding in a Radio-Frequency signal; a radiation element electrically connected to the feed element for radiating the Radio-Frequency signal; at least one meta-material structure electrically connected between the radiation element and the ground element, comprising:
a first element electrically and directly connected to the radiation element; anda second element having one end opened and another end electrically connected to the ground element; and a switch circuit comprising a switch coupled between the second element and the ground element for switching a connection between the second element and the ground element according to a switch signal, wherein when the switch connects the second element with the ground element, a center frequency of the antenna is a first frequency, and when the switch disconnects the second element from the ground element, the center frequency of the antenna is a second frequency, and the second frequency is greater than the first frequency.