Multiband Antenna

摘要

A multiband antenna for receiving or transmitting wireless signals of a plurality of frequency bands includes a grounding sheet, formed with a hole at a first side, for providing grounding, a first micro-strip line, substantially parallel to the first side of the grounding sheet, a connecting unit, connecting to the first side of the grounding sheet and the first micro-strip line, for forming a resonant cavity with the first side of the grounding sheet and the first micro-strip line, a second micro-strip line, formed in the resonant cavity and substantially parallel to the first micro-strip line, a third micro-strip line, extending from the hole of the grounding sheet to the second micro-strip line, and a feed-in terminal, formed on the third micro-strip line within the hole, for transmitting the wireless signals.

主权项

1. A multiband antenna, for receiving or transmitting wireless signals of a plurality of frequency bands, the multiband antenna comprising:
a grounding sheet, formed with a hole at a first side, for providing grounding; a first micro-strip line, substantially parallel to the first side of the grounding sheet, having a length substantially equal to half of a wavelength of a wireless signal corresponding to a lowest frequency band of the plurality of frequency bands; a connecting unit, connecting a terminal of the first side of the grounding sheet and a terminal of the first micro-strip line, for forming a resonant cavity with the first side of the grounding sheet and the first micro-strip line; a second micro-strip line, disposed in the resonant cavity, substantially parallel to the first micro-strip line, and substantially separated from the first micro-strip line by a first gap; a third micro-strip line, extending from the hole of the grounding sheet to a terminal of the second micro-strip line, and substantially separated from the grounding sheet by a second gap around the hole; and a feed-in terminal, formed on the third micro-strip line within the hole, for transmitting the wireless signals of the plurality of frequency bands.