Ceramic antenna module and methods of manufacture thereof
View Patent ↗Antenna modules that contain composite meta-material dielectric bodies that have high effective values of real permittivity and reductions in physical lengths of electrically conducting elements.
1. An antenna module, comprising:
a composite dielectric body including at least one ceramic dielectric inclusion composed of at least one material selected from the group consisting of materials having a relative dielectric permittivity ≧10 and materials having a relative dielectric permeability ≠1, the at least one ceramic dielectric inclusion embedded in a dielectric host material selected from the group consisting of amorphous silica, titania, tantalates, pure alumina, admixtures thereof, and an organic media such that the composite dielectric body has an effective permittivity ≧4;
a metallization layer adjacent the composite dielectric body and including a ground plane and at least one contact pad; and
at least one electrically conductive element disposed parallel to the metallization layer and electrically connected with the at least one contact pad, each conductive element disposed relative to the composite dielectric body such that the conductive element is resonant over a band of frequencies and has a length that is ≦50% of the length that would be required to maintain the same resonance without the composite dielectric body,
wherein the at least one electrically conductive element comprises a plurality of antenna elements.
2. The module of claim 1 , wherein each of the antenna elements is operable in a distinct frequency bandwidth.
3. An antenna module, comprising:
a composite dielectric body including at least one ceramic dielectric inclusion composed of at least one material selected from the group consisting of materials having a relative dielectric permittivity ≧10 and materials having a relative dielectric permeability ≠1, the at least one ceramic dielectric inclusion embedded in a dielectric host material selected from the group consisting of amorphous silica, titania, tantalates, pure alumina, admixtures thereof, and an organic media such that the composite dielectric body has an effective permittivity ≧4;
a metallization layer adjacent the composite dielectric body and including a ground plane and at least one contact pad; and
at least one electrically conductive element disposed parallel to the metallization layer and electrically connected with the at least one contact pad, each conductive element disposed relative to the composite dielectric body such that the conductive element is resonant over a band of frequencies and has a length that is ≦50% of the length that would be required to maintain the same resonance without the composite dielectric body,
further comprising at least one capacitive pad upon which a corresponding one of the at least one electrically conductive elements terminates, and wherein the at least one antenna element is composed of discrete wire.
4. The module of claim 3 , wherein the capacitive pad includes a landing portion having a width that is about 2.5 um to 10 um wider than the cross-sectional diameter of the discrete wire electrically conductive element that terminates upon it, a length sufficient to accommodate for variations in the discrete wire bonding process and a surface area ≦ about 5% of the surface area of the entire capacitive pad.