Multi-band active integrated MIMO antennas

Patent metadata

Field	Value
Publication number	US-9837726-B2
Application number	US-201414325318-A
Country	US
Kind code	B2
Filing date	Jul 7, 2014
Priority date	Jul 7, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The multi-band active integrated MIMO antenna is a planar structure that includes active devices such as power amplifiers (PA) for transmit modes, as well as low-noise-amplifiers (LNA) for receive modes or complete transceivers (both PA and LNA for bi-directional operation, i.e. transmit and receive modes simultaneously). The antenna provides active loading to facilitate a diversity advantage expected from 4G and 5G wireless systems. The integrated active amplifier device within the antenna increases system throughput while supporting multi-band operation for multi-wireless standards. Moreover, integration with the radio frequency front end eases matching while providing higher gain.

First claim

We claim:

1. A multi-band active integrated (MAI) MIMO antenna, comprising:
a planar substrate which includes a top face and a bottom face;
at least one multi-band antenna printed in a multiple input, multiple output (MIMO) configuration on the top face of the planar substrate, wherein said at least one multi-band antenna is a semi-circular array comprising a first semi-ring antenna element connected on the top face of the planar substrate to a second semi-ring antenna element, the first and second semi-ring antenna elements being connected to one another at respective midpoints thereof, each of the first and second semi-ring antenna elements having a semi-circular contour and being positioned concentrically with respect to one another;
at least one bottom around plane disposed on the bottom face directly below the at least one multi-band antenna;
a tunable feedpoint disposed at an end of an outer one of said first and second semi-ring antenna elements;
a shorting post aligned with the midpoints of said first semi-ring antenna element and said second semi-ring antenna element, the shorting post extending from a surface of the at least one multi-band antenna to the bottom ground plane, thereby exciting a second band of operation of said MAI MIMO antenna;
at least one active element operably connected to the at least one printed multi-band antenna and loading the at least one printed multi-band antenna, the at least one active element, being disposed on the top face of the planar substrate and proximate to the at least one printed multi-band antenna; and
a biasing network connected to the at least one active element, the biasing network being disposed on the top face of the planar substrate.

2. The multi-band active integrated MIMO antenna according to claim 1 , further comprising a defected ground meandering rectangular wave patterned structure disposed between and connecting a first of said at least one ground plane to a second of said at least one ground plane.

3. The multi-band active integrated MIMO antenna according to claim 1 , wherein the substrate is a mobile terminal substrate.

4. The multi-band active integrated MIMO antenna according to claim 1 , wherein pairs of the at least one multi-band antenna are disposed in alignment facing each other on opposing sides of the top face of the planar substrate.

5. The multi-band active integrated MIMO antenna according to claim 4 , wherein pairs of said at least one active element corresponding to said at least one multi-band antenna pairs are misaligned with each other on opposing sides of the top face of the planar substrate.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Sharawi Mohammad S
• Dhar Sagar K

Classifications

• H01Q1/243

  with built-in antennas · CPC title

• H01Q23/00

  Antennas with active circuits or circuit elements integrated within them or attached to them · CPC title

• H01Q21/0006 Primary

  Particular feeding systems · CPC title

• H01Q9/0421

  with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence) · CPC title