Antenna device and wireless terminal

JP7789593B2Active Publication Date: 2025-12-22FCNT LTD
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Patent Information

Application Number
JP2022038260
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-11
Publication Date
2025-12-22
Estimated Expiration
2042-03-11

AI Technical Summary

Technical Problem

Patch antennas have a relatively narrow bandwidth, limiting their application in wireless communication systems.

Method used

The antenna device incorporates a metal layer with a notch and a second metal as an electromagnetic coupling element, where the width of the second metal at the opening is smaller than the maximum width inside the notch, allowing for electromagnetic field coupling and broader bandwidth.

Benefits of technology

The design achieves a wider bandwidth, approximately 23% wider than comparative examples, suitable for applications requiring broader frequency ranges such as UWB and enabling distance measurement and high-speed wireless communication.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To widen a band of a patch antenna.SOLUTION: An antenna device comprises: a metal layer which forms an antenna element in a prescribed planar shape; and a ground which is arranged on the lower side of the metal layer. The metal layer comprises: a first metal which forms a planar shape; a notch which is formed on the first metal and notches a portion of an edge of the planar shape; a second metal being an electromagnetic field coupling element which is arranged with a prescribed interval from the first metal on the inner side of the notch; and a power supply line which is formed on the outer side of the planar shape and is connected to the second metal through an opening portion of the notch. The second metal has the width in the opening portion smaller than the maximum width on the inner portion of the notch.SELECTED DRAWING: Figure 1
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