Coupling-Fed Antenna Structure for Multi-Band Devices

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Solution Overview

Problem

The increasing demand for multiple frequency bands in electronic devices, such as smartphones and tablets, poses a challenge due to limited internal space, leading to potential interference between antennas and reduced radiation performance.

Innovation Solution

The implementation of a conductive connection member with an elastic portion and multiple surfaces, allowing for direct power feeding to a first conductive member for lower frequency bands and coupling-feeding to a second conductive member for higher frequency bands, optimizing space efficiency and radiation performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple antennas are added to support multiple frequency bands, then communication capability is improved, but internal space is consumed and antenna interference occurs

Engineering Contradiction:

Improvecommunication capabilityVSAvoidinternal space

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The conductive connection member is designed to serve multiple functions: it acts as a direct feed for lower frequency bands and as a coupling structure for higher frequency bands. This multi-functionality allows a single component to support multiple frequency bands without requiring separate antenna structures, thereby improving communication capability while conserving internal space.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent utilizes the gap between the conductive connection member and the second conductive member as a coupling feed mechanism. By transitioning from direct contact (0D/1D connection) to gap coupling (2D/3D spatial relationship), the system enables higher frequency band operation without additional physical space, as the electromagnetic coupling occurs through the spatial field in the gap region.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple antennas are added to support multiple frequency bands, then communication capability is improved, but radiation performance deteriorates due to interference

Engineering Contradiction:

Improvecommunication capabilityVSAvoidradiation performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The antenna system is segmented into two distinct feeding mechanisms: direct feeding for the first conductive member (lower frequency band) and coupling feeding through the gap for the second conductive member (higher frequency band). This segmentation allows each frequency band to be excited independently through its designated feeding path, preventing mutual interference and maintaining reliable radiation performance across both bands.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If device size is increased to accommodate multiple antennas, then communication capability is improved, but portability is reduced

Engineering Contradiction:

Improvecommunication capabilityVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration enhances radiation efficiency, particularly in frequency bands above 3.3 GHz, by adjusting the area of the second conductive member, thereby improving antenna performance without increasing device size.

Implementation Method 1

The at least one surface of the conductive connection member may be spaced apart, by a gap, from a portion of the second conductive member... receive a signal of a second frequency band higher than the first frequency band by coupling-feeding power to the second conductive member via the conductive connection member

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Data Source

PatentUS20240372246A1Electronic device including antenna including coupling-feeding structure

Publication Date: 2024.11.07 SAMSUNG ELECTRONICS CO LTD

AI summary

According to various embodiments, an electronic device includes: a housing; a first conductive member comprising a conductive material corresponding to a portion of the housing; a second conductive member comprising a conductive material arranged inside the housing; a printed circuit board arranged inside the housing; a wireless communication circuit arranged on the printed circuit board; and a conductive connection member comprising a conductive material electrically connected to the wireless communication circuit. The conductive connection member includes an elastic portion and at least one of a first surface, a second surface, a third surface, and a fourth surface. The elastic portion of the conductive connection member is in contact with the first conductive member, and the at least one of the first surface, the second surface, the third surface, and the fourth surface of the conductive connection member is spaced apart, by a gap, from a portion of the second conductive member. The wireless communication circuit may be configured to: receive a signal in a first frequency band by directly feeding power to the first conductive member via the conductive connection member, and receive a signal in a second frequency band higher than the first frequency band by coupling-feeding power to the second conductive member via the conductive connection member.