Dual-polarized antenna for mobile communication base station

Patent metadata

Field	Value
Publication number	US-9577337-B2
Application number	US-201414538168-A
Country	US
Kind code	B2
Filing date	Nov 11, 2014
Priority date	Nov 11, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

Disclosed is a dual polarization-based small antenna for a mobile communication base station. The dual-polarized antenna includes a substrate, a first feed attached to one surface of the substrate, a second feed spaced apart from the first feed and attached to the one surface of the substrate, a radiator located above the first feed and the second feed, and a spiral resonator located between the first feed and the second feed. The dual-polarized antenna effectively provides a broad bandwidth and a high isolation characteristic while having a reduced size, and the spiral resonator allows the isolation characteristic at a certain narrow band range to be effectively enhanced by adjusting of the position, size, and shape of the spiral resonator without affecting the operating frequency of the dual-polarized antenna.

First claim

What is claimed is:

1. A dual-polarized antenna comprising:
a substrate;
a first feed attached to one surface of the substrate;
a second feed spaced apart from the first feed and attached to the one surface of the substrate;
a radiator located above the first feed and the second feed; and
a spiral resonator located between the first feed and the second feed, the spiral resonator being provided by etching a line having an eddy shape in a dielectric substrate,
wherein, an electric current is induced in the line having an eddy shape when a magnetic field is applied to the line, thus causing a mutual inductance between lines.

2. The dual-polarized antenna of claim 1 , wherein each of the first feed and the second feed has a bent ‘ ’ shape formed by bending a metal plate.

3. The dual-polarized antenna of claim 2 , wherein each of the first feed and the second feed is provided as the bent ‘ ’ shape while having a same height.

4. The dual-polarized antenna of claim 1 , wherein the radiator includes a metal plate provided in one of a circular shape, an oval shape, and a polygonal shape, and located in parallel to the substrate.

5. A dual-polarized antenna comprising:
a substrate;
a first feed attached to one surface of the substrate;
a second feed spaced apart from the first feed and attached to the one surface of the substrate;
a radiator located above the first feed and the second feed; and
a spiral resonator located between the first feed and the second feed, the spiral resonator being provided by etching a line having an eddy shape in a dielectric substrate,
wherein each of the first feed and the second feed has a bent ‘ ’ shape formed by bending a metal plate, and
wherein the spiral resonator is located at the same height as heights of the first feed and the second feed each having the bent ‘ ’ shape.

6. A dual-polarized antenna comprising:
a substrate;
a first feed attached to one surface of the substrate;
a second feed spaced apart from the first feed and attached to the one surface of the substrate;
a radiator located above the first feed and the second feed;
a spiral resonator located between the first feed and the second feed, the spiral resonator being provided by etching a line having an eddy shape in a dielectric substrate; and
a shorting pin connected to the eddy-shaped line to earth the eddy-shaped line,
wherein each of the first feed and the second feed has a bent ‘ ’ shape formed by bending a metal plate.

7. The dual-polarized antenna of claim 6 , wherein the eddy shape is a circular shape or a square shape.

8. The dual-polarized antenna of claim 6 , wherein the shorting pin comprises:
a first shorting pin connected to a start portion that is provided at a center of the eddy-shaped line; and
a second shorting pin connected to an end portion of the eddy-shaped line.

9. The dual-polarized antenna of claim 1 , wherein the substrate, the first feed, the second feed, the radiator, and the spiral resonator are mounted in a metal cube having a cavity at a center portion thereof.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Jung Jae Ho
• Lee Jung Nam
• Lee Kwang Chun

Classifications

• H01Q1/525

  between emitting and receiving antennas · CPC title

• H01Q1/246

  specially adapted for base stations · CPC title

• H01Q9/0457 Primary

  electromagnetically coupled to the feed line · CPC title

• H01Q11/14 Primary

  with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effect (H01Q11/20 takes precedence) · CPC title

• H01Q1/24

  with receiving set · CPC title