Dielectric substrate with selectively controlled effective...

Details Dielectric substrate with selectively controlled effective... Dielectric substrate with selectively controlled effective...

2006-01-31

2006-01-31

Dinh, Trinh Vo (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

74, 74

Reexamination Certificate

active

06992636

ABSTRACT:
A substrate (300) for an RF device includes a plurality of layers (102) of dielectric material cofired in a stack. The plurality of layers (102) is formed from a material having a permittivity. Selected ones of the layers (102) have a pattern of perforations (106) formed in at least one perforated area (104). The perforated areas (104) are generally aligned with one another in the stack to lower one or more of an effective value of a permittivity and a loss tangent in a least one spatially defined region (504) of the substrate (300).

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Li, Zhifang, et al. “Performance Enhancement of Bandgap Printed Antennas Using Finite Element Method and Size/Topology Optimization Methods,” AP2000 Millennium Conference of Antennas and Propagation, Davos, Switzerland, Apr. 9-14, 2000. <<http://citeseer.nj.nec.com/article/li00performance.html>>.

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