Microstrip antenna

Patent metadata

Field	Value
Publication number	US-10608332-B2
Application number	US-201715834594-A
Country	US
Kind code	B2
Filing date	Dec 7, 2017
Priority date	Jan 11, 2017
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

There is provided a microstrip antenna. A plurality of dielectric layers are stacked. An antenna is provided on the uppermost dielectric layer of the plurality of dielectric layers. Conductor layers are respectively provided on lower surfaces of the dielectric layers. The conductor layers have different dimensions in a plane direction thereof so that electromagnetic waves to be radiated from the conductor layers are cancelled with each other.

First claim

What is claimed is:

1. A microstrip antenna comprising:
a plurality of stacked dielectric layers;
an antenna including a plurality of radiation elements disposed parallel to each other and symmetrically connected to a power feeding line,
wherein the radiation elements are provided on an uppermost dielectric layer of the plurality of dielectric layers;
the power feeding line being configured to feed high-frequency power to each radiation element; and
first and second conductor ground layers respectively provided on lower surfaces of the dielectric layers and disposed symmetrically to each other, and are not electrically connected with the antenna, the conductor ground layers having different dimensions in a plane direction thereof so that electromagnetic waves to be radiated from end portions of the conductor ground layers become antiphases with respect to each other and the electromagnetic waves to be radiated are cancelled with each other, thereby suppressing bad influence on the directionality of the antenna;
wherein the dimension of the second conductor ground layer provided on the lower surface of one of the dielectric layers in the plane direction thereof, is smaller than the dimension of the first conductor ground layer, which is provided on a lower surface of another one of the dielectric layers, the another one of the dielectric layers being provided above the one of the dielectric layers in the plane direction thereof, and
wherein the microstrip antenna has a planar shape and is connected to an MMIC (Monolithic Microwave Integrated Circuit).

Assignees

• Denso Ten Ltd

Inventors

• Nishimoto Norihisa
• Oka Kenji
• Tsuchiya Junzoh
• Hashimoto Ryuichi
• Shirahige Kenta

Classifications

• H01Q9/0407

  Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40) · CPC title

• H01Q1/52 Primary

  Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure (absorbing means H01Q17/00) · CPC title

• H01Q21/065

  Patch antenna array · CPC title

• H01Q1/36

  Structural form of radiating elements, e.g. cone, spiral, umbrella; {Particular materials used therewith}(H01Q1/08, H01Q1/14 take precedence) · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title