Stacked patch antenna devices and methods
A stacked patch antenna comprises two or more patch antennas physically disposed in a stack to provide a multi-frequency or broad band antenna. However, independence of the resonant response frequencies of the lower and upper patches of each stacked patch antenna pair ground requires metallization dimensions for the upper patch's lower surface be contained within the perimeter of the lower patch's resonant metallization. Accordingly, composite stacked patch element dimensions are limited by the desired resonant frequency of the lower patch. The inventors have established an alternate physical structure where the resonant patch geometry of the lower patch element's upper metallization is not limited by the lower surface ground plane metallization of the first upper patch element. The inventors have also established design solutions allowing the lower frequency performance of the first, lower patch within a stacked patch antenna to be lowered without compromising footprint of the resulting antenna.
1. An antenna comprising:
a first patch antenna element comprising a first dielectric body formed from a first dielectric material having a first predetermined geometry comprising a first upper surface with a first metallization on the first upper surface of the first dielectric body having a second predetermined geometry and a distal first lower surface with a second metallization on the distal first lower surface of the first dielectric body having a third predetermined geometry;
a second patch antenna element disposed below the first patch antenna element comprising a second dielectric body formed from a second dielectric material having a fourth predetermined geometry comprising a second upper surface with a third metallization on the second upper surface of the second dielectric body having a fifth predetermined geometry and a distal second lower surface with a fourth metallization on the distal second lower surface of the second dielectric body having a sixth predetermined geometry; and
a spacer having a seventh predetermined geometry and a first thickness formed from a third dielectric material; wherein
the third metallization on the second upper surface of the second dielectric body is disposed towards the spacer;
the second metallization on the distal first lower surface of the first dielectric body is disposed towards the spacer; and
a first predetermined portion of the periphery of the third metallization on the second upper surface of the second dielectric body is within the periphery of the second metallization on the distal first lower surface of the first dielectric body.
2. The antenna according to claim 1 , wherein
at least one of the first predetermined geometry, the second predetermined geometry, the third predetermined geometry, the fourth predetermined geometry, the fifth predetermined geometry, the sixth predetermined geometry, and the seventh predetermined geometry is circular, elliptical, square, rectangular, a regular polygon, an irregular polygon, or an arbitrary geometry.
3. The antenna according to claim 1 , wherein
a second predetermined portion of the periphery of the third metallization on the upper surface of the second dielectric body does not extend beneath the second metallization on the distal first lower surface of the first dielectric body.
4. The antenna according to claim 1 , wherein
a second predetermined portion of the periphery of the third metallization on the upper surface of the second dielectric body does not extend beneath the second metallization on the distal first lower surface of the first dielectric body;
a third predetermined portion of the third metallization on the upper surface of the second dielectric body is beneath the second metallization on the distal first lower surface of the first electric body;
the first predetermined portion of the periphery of the third metallization and the second predetermined portion of the periphery of the third metallization define a series of structures each of a predetermined geometry disposed around a periphery of the third predetermined portion of the third metallization on the upper surface of the second dielectric body.
5. A method comprising:
providing a first patch antenna element comprising a first dielectric body formed from a first dielectric material having a first predetermined geometry comprising a first upper surface with a first metallization on the first upper surface of the first dielectric body having a second predetermined geometry and a distal first lower surface with a second metallization on the distal first lower surface of the first dielectric body having a third predetermined geometry;
providing a second patch antenna element disposed below the first patch antenna element comprising a second dielectric body formed from a second dielectric material having a fourth predetermined geometry comprising a second upper surface with a third metallization on the second upper surface of the second dielectric body having a fifth predetermined geometry and a distal second lower surface with a fourth metallization on the distal second lower surface of the second dielectric body having a sixth predetermined geometry; and
providing a spacer having a seventh predetermined geometry and a first thickness formed from a third dielectric material; wherein
the third metallization on the second upper surface of the second dielectric body is disposed towards the spacer;
the second metallization on the distal first lower surface of the first dielectric body is disposed towards the spacer; and
a first predetermined portion of the periphery of the third metallization on the second upper surface of the second dielectric body is within the periphery of the second metallization on the distal first lower surface of the first dielectric body.
6. The method according to claim 5 , wherein
at least one of the first predetermined geometry, the second predetermined geometry, the third predetermined geometry, the fourth predetermined geometry, the fifth predetermined geometry, the sixth predetermined geometry, and the seventh predetermined geometry is circular, elliptical, square, rectangular, a regular polygon, an irregular polygon, or an arbitrary geometry.
7. The method according to claim 5 , wherein
a second predetermined portion of the periphery of the third metallization on the upper surface of the second dielectric body does not extend beneath the second metallization on the distal first lower surface of the first dielectric body.
8. The method according to claim 5 , wherein
a second predetermined portion of the periphery of the third metallization on the upper surface of the second dielectric body does not extend beneath the second metallization on the distal first lower surface of the first dielectric body;
a third predetermined portion of the third metallization on the upper surface of the second dielectric body is beneath the second metallization on the distal first lower surface of the first electric body;
the first predetermined portion of the periphery of the third metallization and the second predetermined portion of the periphery of the third metallization define a series of structures each of a predetermined geometry disposed around a periphery of the third predetermined portion of the third metallization on the upper surface of the second dielectric body.