Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2006-06-06
2006-06-06
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
Reexamination Certificate
active
07057561
ABSTRACT:
A multi-frequency antenna includes a antenna body, a patch antenna, and a ground plane. The antenna body has first and second radiation arms, a feed-in terminal, and a ground terminal disposed in one side of the antenna body for signal feeding, and grounding. The first and second radiation arms are arranged in a symmetrically inward spiral structure. Two current paths with different lengths are created, along with the two radiation arms from the feed-in terminal, and thereby the antenna is operable at two frequencies. An additional patch antenna can be disposed beside the antenna body to allow the antenna to have more operational frequencies. In practice, the length of the patch antenna can be designed according to the bandwidth of Bluetooth signals to meet the requirement of Bluetooth communication. The ground plane is disposed beneath the antenna body and the patch antenna for the purpose of grounding of the antenna's signals. In implementation, a section of the ground plane, which is above the endfire direction, can be hollowed to increase antenna's bandwidth. The hollowed section can also be used to dispose other components to increase the component density.
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A Minh Dieu
High Tech Computer Corp.
Nguyen Hoang V.
Thomas. Kayden, Horstemeyer & Risley
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