Quasi-isotropic antenna

Patent metadata

Field	Value
Publication number	US-11831087-B2
Application number	US-202117476908-A
Country	US
Kind code	B2
Filing date	Sep 16, 2021
Priority date	Dec 28, 2018
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A quasi-isotropic antenna includes: a feeder; a loop antenna configured to radiate a first radio wave based on a feeding from the feeder; and a dipole antenna adjacent to the loop antenna, and configured to radiate a second radio wave by resonating based on a resonant-coupling with the loop antenna, wherein a radiation pattern of the first radio wave is orthogonal to a radiation pattern of the second radio wave.

First claim

What is claimed is:

1. A quasi-isotropic antenna, comprising:
a feeder;
a loop antenna configured to radiate a first radio wave based on a feeding from the feeder;
a dipole antenna configured to radiate a second radio wave by resonating based on a resonant-coupling with the loop antenna, and comprising
a conductive case adjacent to the loop antenna,
an electrode circuit in the conductive case,
an electrode connecting wire configured to connect the electrode circuit and an electrode, and
a capacitor configured to connect the electrode connecting wire and the conductive case,

wherein a radiation pattern of the first radio wave is orthogonal to a radiation pattern of the second radio wave.

2. The quasi-isotropic antenna of claim 1 ,
wherein the capacitor is configured in the dipole antenna to be shorted such that the conductive case, the capacitor, the electrode connecting wire, and the electrode form the dipole antenna in response to a high-frequency current being applied to the loop antenna by the feeding, and
wherein the capacitor is configured in the dipole antenna to be opened in response to a low-frequency current being applied to the loop antenna by the feeding.

3. The quasi-isotropic antenna of claim 1 , wherein the dipole antenna has a length corresponding to a wavelength of the second radio wave such that the resonance occurs in the dipole antenna in response to a high-frequency current being applied by the feeding.

4. The quasi-isotropic antenna of claim 3 , wherein a length of the electrode connecting wire is such that the resonance occurs in the dipole antenna in response to the high-frequency current being applied by the feeding.

5. The quasi-isotropic antenna of claim 1 , wherein the quasi-isotropic antenna is applied in a medical implant device.

6. An antenna device, comprising:
a first antenna configured to radiate a first radio wave having a first radiation pattern, based on a power supplied from a feeder; and
a conductive case configured to:
house an electronic circuit, and
radiate a second radio wave having a second radiation pattern orthogonal to the first radiation pattern, by resonating based on a resonant-coupling with the first antenna.

7. The antenna device of claim 6 , wherein the first antenna is a loop antenna and the conductive case is a dipole antenna.

8. The antenna device of claim 6 , wherein the antenna device is a medical implant device.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Jaechun
• Kim Jongpal
• Kang Joonseong
• Suh Junyeub
• Lee Wonseok

Classifications

• H01Q7/005 Primary

  with variable reactance for tuning the antenna · 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

• H01Q9/0407

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

• H01Q21/29

  Combinations of different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence) · CPC title

• H01Q19/22 Primary

  using a secondary device in the form of a single substantially straight conductive element · CPC title