Planar antenna structure with reduced coupling between antenna arrays

Patent metadata

Field	Value
Publication number	US-10756446-B2
Application number	US-201816039508-A
Country	US
Kind code	B2
Filing date	Jul 19, 2018
Priority date	Jul 19, 2018
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

An antenna includes a substrate, a first array of transmit antenna patches on the substrate, and a second array of receive antenna patches on the substrate. A spatial orientation of the first array with respect to the second array is selected based on a predetermined desired radiation coupling between the first array and the second array. The antenna can be part of an automotive radar sensor.

First claim

The invention claimed is:

1. An antenna, comprising:
a substrate having a planar surface defining a plane;
a first planar array of transmit antenna patches on the planar surface of the substrate in the plane, the transmit antenna patches being disposed along a longitudinal axis of the first planar array; and
a second planar array of receive antenna patches on the planar surface of the substrate in the plane, the receive antenna patches being disposed along a longitudinal axis of the second planar array; wherein
a spatial orientation of the first planar array with respect to the second planar array is such that the longitudinal axis of the first planar array and the longitudinal axis of the second planar array are substantially nonparallel and define a tilt angle defining an angular orientation between them within the plane, the angular orientation being selected based on a desired radiation coupling between the first array and the second array; and
at least one of the transmit antenna patches comprises a first side edge facing the second planar array, and at least one of the receive antenna patches comprises a second side edge facing the first planar array, the spatial orientation being selected such that the first and second side edges are substantially parallel.

2. The antenna of claim 1 , wherein the angular orientation between the longitudinal axis of the first planar array and the longitudinal axis of the second planar array is selected to reduce the radiation coupling between the first array and the second array.

3. The antenna of claim 1 , wherein the tilt angle is in a range of 2.0 to 5.0 degrees.

4. The antenna of claim 3 , wherein at least one of the transmit antenna patches comprises a first side edge facing the second planar array, and at least one of the first plurality of conductive lines is substantially nonparallel to the first side edge.

5. The antenna of claim 3 , wherein at least one of the receive antenna patches comprises a first side edge facing the first planar array, and at least one of the second plurality of conductive lines is substantially nonparallel to the first side edge.

6. The antenna of claim 1 , wherein the tilt angle is 2.5 degrees.

7. The antenna of claim 1 , further comprising:
a first plurality of conductive lines, each of the first plurality of conductive lines connecting a pair of adjacent transmit antenna patches; and
a second plurality of conductive lines, each of the second plurality of conductive lines connecting a pair of adjacent receive antenna patches.

8. The antenna of claim 7 , wherein at least one of the first plurality of conductive lines is substantially nonparallel to at least one of the second plurality of conductive lines.

9. The antenna of claim 1 , wherein the antenna is part of a radar sensor.

10. The antenna of claim 1 , wherein the antenna is part of an automotive radar sensor.

11. The antenna of claim 1 , further comprising a second planar array of transmit antenna patches.

12. The antenna of claim 1 , further comprising a second planar array of receive antenna patches.

Assignees

• Veoneer Us Inc

Inventors

• Ahmadloo Majid
• Mobius Arnold

Classifications

• H01Q21/065 Primary

  Patch antenna array · CPC title

• H01Q21/0075

  Stripline fed arrays (H01Q21/065 takes precedence) · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q1/523

  between antennas of an array · CPC title

• H01Q1/3233

  particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems · CPC title