Microstrip multi-band composite antenna

Communications: radio wave antennas – Antennas – Microstrip

Reexamination Certificate

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Reexamination Certificate

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07746276

ABSTRACT:
The multi-band antenna structure includes a first antenna having a band width about a middle frequency and a second antenna spaced and electrically isolated from the antenna. Ends of the second antenna are shorted to each other and the antenna floats electrically. The first and second antennas are planar and superimposed in parallel planes. At least two layers of dielectric material of a thickness is between the two antennas. A third layer of dielectric material of a third thickness is between the two antennas.

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Extended European search report; dated Oct. 9, 2008 for European Application No. 0672088.1.
Surducan E, et al.; “Modified Printed Dipole Antennas for Wireless Multi-Band Communication Devices” URSI 2004 Int'l Symposium on Electromagnetic Theory; vol. 2, May 23, 2004.
Anguera J, et al.; “Multifrequency Microstrip Patch Antenna Using Multiple Stacked Elements”; IEEE Microwave and Wireless Components Letters; vol. 13, No. 3, Mar. 1, 2003.

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