Communications: radio wave antennas – Antennas – Microstrip
Patent
1994-07-20
1995-09-12
Hajec, Donald
Communications: radio wave antennas
Antennas
Microstrip
343846, H01Q 138
Patent
active
054500907
ABSTRACT:
The present invention provides a miniaturized multilayer microstrip antenna that includes a stack of antenna sub-stacks, a ground element, and a plurality of electrically conductive segments. Each of the antenna sub-stacks includes a pair of substantially parallel outer principal faces. A sandwich of two relatively thin electrically non-conductive substrate elements, separated by a relatively thin electrically conductive layer, extends between each pair of parallel outer principal faces. The electrically conductive layer has at least one void region through which an electrically conductive feedthrough element extends. The feedthrough element also extends between the outer principal faces. The ground element electrically couples the conductive layers of each of the antenna sub-stacks. The electrically conductive segments are positioned between adjacent principal faces of two adjacent antenna sub-stacks in the stack, and electrically connect the feedthrough elements of the adjacent antenna sub-stacks, thereby establishing a first continuous elongated antenna element.
REFERENCES:
patent: 4131893 (1978-12-01), Munson et al.
patent: 4980694 (1990-12-01), Hines
patent: 5006858 (1991-04-01), Shirosaka
Kieth R. Carver and James W. Mink, Microstrip Antenna Technology, IEEE Transactions on Antennas and Propagation, vol. AP-29, No. 1, Jan. 1981.
Gels Robert G.
Robbins William L.
Hajec Donald
Le Hoang-anh
The Charles Stark Draper Laboratory Inc.
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