Patent ID: 8144060

Claim:
A dual frequency band antenna unit comprising: a first antenna structure comprising a resonate plate having a slot that separates the resonate plate into a first patch associated with a first feed point and a corresponding first frequency band and a second patch associated with a second feed point and a corresponding second frequency band with the first patch having an area that is approximately two to two and one half times larger than an area of the second patch; a first antenna circuit coupled to the first feed point and the second feed point to receive one or more signals transmitted from a transceiver unit; a second antenna structure comprising a resonate plate having a slot that separates the resonate plate into a first patch associated with a first feed point of the second antenna structure and the first frequency band and a second patch associated with a second feed point of the second antenna structure and the second frequency band with the first patch having an area that is approximately two to two and one half times larger than an area of the second patch; and a second antenna circuit coupled to the first feed point and the second feed point of the second antenna structure to send one or more receive signals to the transceiver unit, wherein the first feed point is configured to maximize coupling into the second antenna structure at the first frequency band and the second feed point is configured to maximize coupling into the second antenna structure at the second frequency band.