Wideband Antenna Matching Adjustment Element Bandwidth

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Solution Overview

Problem

Conventional planar inverted F antennas (PIFAs) have limited bandwidth, particularly in the low frequency band, restricting their application in wide frequency band wireless communication systems such as LTE.

Innovation Solution

A wideband antenna design incorporating a grounding element, a radiating element, a matching adjustment element, a feed-in element, and a shorting element, where the width of the matching adjustment element is crucial for bandwidth, allowing adjustment to achieve wideband performance across desired frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a conventional planar inverted F antenna (PIFA) is used, then the antenna structure is simple and compact, but the bandwidth is limited especially in low frequency band

Engineering Contradiction:

Improveantenna structureVSAvoidbandwidth

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The antenna is divided into multiple functional elements: grounding element, radiating element, matching adjustment element, feed-in element, and shorting element. Each element performs a specific function to collectively achieve wideband performance while maintaining structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The matching adjustment element introduces a width dimension parameter that directly controls bandwidth. By adjusting the width of this element, the antenna can be tuned to achieve wideband coverage across low and high frequency bands without increasing overall structural complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the PIFA bandwidth is increased to cover wide frequency bands, then the application range expands, but the antenna size increases

Engineering Contradiction:

Improvebandwidth coverageVSAvoidantenna size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The matching adjustment element is designed with a specific width that is optimized for bandwidth performance. This local dimensional optimization allows the antenna to achieve wideband coverage without requiring a proportional increase in overall antenna volume.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The bandwidth of the antenna is controlled by changing the width parameter of the matching adjustment element. This parameter adjustment enables wideband operation across different frequency bands while maintaining a compact antenna structure suitable for portable devices.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8766856B2Wideband antenna

Publication Date: 2014.07.01 WISTRON NEWEB CORP

AI summary

A wideband antenna includes a grounding element electrically connected to a ground, a radiating element, a matching adjustment element electrically connected to the radiating element, a feed-in element electrically connected between the matching adjustment element and the grounding element for receiving feed-in signals, and a shorting element electrically connected between the matching adjustment element and the grounding element. A width of the matching adjustment element is related to a bandwidth of the wideband antenna.