Inverted F-Type Array Antenna Having Structure for Isolation Improvement

Patent metadata

Field	Value
Publication number	US-2016226139-A1
Application number	US-201514620726-A
Country	US
Kind code	A1
Filing date	Feb 12, 2015
Priority date	Feb 3, 2015
Publication date	Aug 4, 2016
Grant date	—

Abstract

A system and a method are provided that are capable of providing map data for supporting a variety of user network environments and selecting data zones freely. A navigation terminal includes a reception unit adapted to receive a file in which map data of a specific zone is stored, from a map provision server; and an execution unit adapted to execute a navigation function on the specific zone using the file. The file is produced by an individual unit with respect to each of geographic areas divided by a mesh unit having a variable size. The size of the mesh unit is decided according to the amount of information included in the geographic area such that the file has an equalized size.

First claim

What is claimed is:

1 . An inverted F-type array antenna having a structure for isolation improvement, comprising:
a substrate; a first inverted F-type antenna formed on an upper surface of the substrate toward a first direction of directions parallel with the upper surface of the substrate; and a second inverted F-type antenna formed on the upper surface of the substrate toward a second direction, opposite to the first direction, from among the directions parallel with the upper surface of the substrate, so as to be mirrored with respect to the first inverted F-type antenna, wherein a slot where at least one capacitor for preventing interference between the first inverted F-type antenna and the second inverted F-type antenna is disposed is formed at a region between the first inverted F-type antenna and the second inverted F-type antenna of the upper surface of the substrate.

2 . The inverted F-type array antenna of claim 1 , wherein the slot where the at least one capacitor is disposed generates a resonance frequency equal to a frequency which at least one of the first inverted F-type antenna or the second inverted F-type antenna radiates, to prevent the interference between the first inverted F-type antenna and the second inverted F-type antenna.

3 . The inverted F-type array antenna of claim 2 , wherein a value of the at least one capacitor is adjusted such that there is generated a resonance frequency equal to a frequency which at least one of the first inverted F-type antenna or the second inverted F-type antenna radiates.

4 . The inverted F-type array antenna of claim 2 , wherein at least one of a size of the at least one capacitor or the number of capacitors disposed at the slot is adjusted such that there is generated a resonance frequency equal to a frequency which at least one of the first inverted F-type antenna or the second inverted F-type antenna radiates.

5 . The inverted F-type array antenna of claim 2 , wherein a depth of the slot where the at least one capacitor is disposed is adjusted such that there is generated a resonance frequency equal to a frequency which at least one of the first inverted F-type antenna or the second inverted F-type antenna radiates.

6 . The inverted F-type array antenna of claim 2 , wherein the slot where the at least one capacitor is disposed matches impedance between the first inverted F-type antenna and the second inverted F-type antenna.

7 . The inverted F-type array antenna of claim 1 , wherein when the inverted F-type array antenna is disposed in plurality on the upper surface of the substrate, at least one slot where at least one capacitor is disposed is formed at a region between the plurality of inverted F-type array antennas of the upper surface of the substrate, to separate the plurality of inverted F-type array antennas physically.

8 . The inverted F-type array antenna of claim 1 , wherein each of the first inverted F-type antenna and the second inverted F-type antenna comprises:
a ground element electrically connected with the substrate; a feeding element formed to be adjacent to the ground element and configured to transfer a feeding signal; and a radiation element electrically connected with the ground element and the feeding element, extending in the first direction or the second direction, and configured to radiate a wireless signal.

9 . The inverted F-type array antenna of claim 1 , wherein the upper surface of the substrate is formed to have a plane, a circle, or a polygon.

10 . An array antenna having a structure for isolation improvement, comprising:
a substrate; a first antenna formed on an upper surface of the substrate toward a first direction of directions parallel with the upper surface of the substrate; and a second antenna formed on the upper surface of the substrate toward a second direction, opposite to the first direction, from among the directions parallel with the upper surface of the substrate, so as to be mirrored with respect to the first antenna, wherein a slot where at least one capacitor for preventing interference between the first antenna and the second antenna is disposed is formed at a region between the first antenna and the second antenna of the upper surface of the substrate.

11 . The array antenna of claim 10 , wherein the slot where the at least one capacitor is disposed generates a resonance frequency equal to a frequency which at least one of the first antenna or the second antenna radiates, to prevent the interference between the first antenna and the second antenna.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Yu Jong Won
• Kwon Duk Soo
• Kim Kwang Seok
• Lee Dong Jin

Classifications

• H01Q21/10

  Collinear arrangements of substantially straight elongated conductive units · CPC title

• H01Q1/52

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

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title

• H01Q9/42

  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength · CPC title

• H01Q1/521

  reducing the coupling between adjacent antennas · CPC title