Ultra wideband bow-tie printed antenna

• US 20050146480A1
• Filed: 08/26/2004
• Published: 07/07/2005
• Est. Priority Date: 09/09/2003
• Status: Active Grant

• Current Assignee: National Institute of Information and Communications Technology
• Original Assignee: National Institute of Information and Communications Technology
• Inventors: Kohno, Ryuji, Yazdandoost, Kamya Yekeh
• Granted Patent: US 7,123,207 B2
• Time in Patent Office: Days
• US Class Current: 343/795
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

A printed antenna includes a dielectric substrate having a pair of printed antenna elements to form a dipole antenna. On an antenna plane, an xy axis system is defined so that an origin is defined at a center of location of the antenna elements, and an x axis is set in a direction that the antenna elements are arranged, a y axis is set in the direction perpendicular to the x axis, and a size of the antenna elements in the direction of the y axis become gradually larger according to the x axis changing in an outer direction. Each of the antenna elements has an impedance matching part at a feeding side of the antenna elements. The printed antenna can be used in an ultra wide-band frequency, and is small profile, is light weight and low in cost.

Claims

1. A printed antenna having a dielectric substrate and a pair of printed antenna elements on the substrate comprising:

antenna elements being set separately and adjacently each other on a substrate;

an xy axis system being defined on an antenna plane so that the origin is defined at a center of location of the antenna elements, an x axis is set in a direction that the antenna elements are arranged, and a y axis is set in a direction perpendicular to the x axis;

a size of the antenna elements in the direction of the y axis becoming gradually larger according to the x axis changing in an outer direction; and

each of the antenna elements comprising an impedance matching part at a feeding side of the antenna elements.

2. A printed antenna of claim 1, wherein the impedance matching parts are narrowed step by step from the antenna element side to the feeding side of the printed antenna.

3. A printed antenna of claim 1, wherein the pair of antenna elements have a bow-tie type figure.

4. A printed antenna of claim 2, wherein the pair of the antenna elements have a bow-tie type figure.

5. A printed antenna of claim 1, wherein each part of the ends of the antenna element of the most outside on the x axis is cut and parallel to the x axis.

6. A printed antenna of claim 2, wherein each part of the ends of the antenna element of the most outside on the x axis is cut and parallel to the x axis.

7. A printed antenna of claim 1, wherein outer sides of the antenna elements perpendicular to the x axis are parallel to each other, and inner sides of the antenna elements perpendicular to the x axis are parallel to each other.

8. A printed antenna of claim 2, wherein outer sides of the antenna elements perpendicular to the x axis are parallel to each other, and inner sides of the antenna elements perpendicular to the x axis are parallel to each other.

9. A printed antenna of claim 1, wherein the substrate comprises one of FR4, Teflon or Silicon, and the printed pattern comprises one of Cu, Al, Ag or Au.

10. A printed antenna of claim 2, wherein the substrate comprises one of FR4, Teflon or silicon, and the printed pattern comprises one of Cu, Al, Ag or Au.