Multi-port multi-beam antenna system on printed circuit board with low correlation for MIMO applications and method therefor
An antenna assembly has a dielectric substrate. A plurality of end fire antennas in a Yagi-Uda configuration is positioned around edges of the dielectric substrate.
1. An antenna assembly comprising:
a dielectric substrate; and
a plurality of end fire antennas in a Yagi-Uda configuration positioned at edges of the dielectric substrate, wherein each of the end fire antennas comprises:
an upper dipole pair;
a lower dipole pair; and
a metallic wall formed around a back and side areas of the upper dipole pair and the lower dipole pair;
wherein the upper dipole pair is formed of a first set of parallel dipoles and the lower dipole pair is formed of a second set of parallel dipoles, the first set of parallel dipoles and the second set of parallel dipoles each being of a different length to support separate λ/2 resonance modes, wherein λ is a wavelength of a 5G frequency band.
2. The antenna assembly of claim 1 , wherein each of the end fire antennas comprises two dipoles connected in parallel as a respective radiating element.
3. The antenna assembly of claim 1 , wherein the metallic wall has a height to width aspect ratio of 1:1.
4. The antenna assembly of claim 1 , comprising:
a ground plane coupled to the lower dipole pair; and
a transmission line coupled to the upper dipole pair.
5. The antenna assembly of claim 4 , wherein the transmission line is a 50-ohm transmission line.
6. The antenna assembly of claim 1 , comprising a parasitic element mounted parallel to the lower dipole pair and the upper dipole pair.
7. The antenna assembly of claim 1 , wherein the dielectric substrate is a multi-layer Liquid Crystal Polymer (LCP) circuit board.
8. An antenna assembly comprising:
a dielectric substrate, wherein the dielectric substrate is a multi-layer Liquid Crystal Polymer (LCP) circuit board;
a plurality of end fire antennas in a Yagi-Uda configuration positioned at edges of the dielectric substrate, wherein each of the end fire antennas comprises:
an upper dipole pair;
a lower dipole pair,
wherein the upper dipole pair is formed of a first set of parallel dipoles and the lower dipole pair is formed of a second set of parallel dipoles, the first set of parallel dipoles and the second set of parallel dipoles each being of a different length to support separate λ/2 resonance modes, wherein λ is a wavelength of a 5G frequency band;
a metallic wall formed around a back and side areas of the upper dipole pair and the lower dipole pair;
a ground plane coupled to the lower dipole pair;
a transmission line coupled to the upper dipole pair; and
a device for dual polarized broadside radiations formed on a top surface of a center area of the dielectric substrate.
9. The antenna assembly of claim 8 , comprising a parasitic element mounted parallel to the lower dipole pair and the upper dipole pair.
10. The antenna assembly of claim 8 , comprising a pair of slotted resonant waveguide antennas formed on a top surface of a center area of the dielectric substrate.
11. The antenna assembly of claim 8 , comprising a cross-slot antenna formed on a top surface of a center area of the dielectric substrate.