Meander-Shaped Wideband Antenna Design for LTE Bandwidth

Solution Overview

Problem

Existing wideband antennas face challenges in increasing their operating bandwidth while maintaining efficiency and reducing dimensions to accommodate the wider frequency ranges required by advanced wireless communication systems like LTE, which operate from 704 MHz to 960 MHz and 1710 MHz to 2700 MHz.

Innovation Solution

The design incorporates a meander-shaped radiating unit and a coupling method, where a third radiating unit is electrically connected to a grounding element and parallel to a meander-shaped element, allowing for resonance across multiple frequency bands and enhancing bandwidth through coupling effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional antenna structures are used, then antenna dimension can be kept compact, but operating bandwidth is limited

Engineering Contradiction:

Improveoperating bandwidthVSAvoidantenna dimension

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The radiating element is divided into multiple segments including a meander-shaped radiating unit with multiple meander segments. This segmentation allows the antenna to support multiple resonant modes and frequency bands within a compact structure, thereby increasing operating bandwidth without proportionally increasing antenna dimension

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The meander-shaped radiating unit introduces additional spatial complexity through its folded configuration. By utilizing the meander shape with multiple segments extending in different directions, the antenna achieves increased electrical length and bandwidth within a limited physical footprint, effectively using dimensional arrangement to resolve the bandwidth-size tradeoff

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If antenna dimension is decreased to accommodate compact design, then ease of installation is improved, but operating bandwidth decreases

Engineering Contradiction:

Improveoperating bandwidthVSAvoidantenna volume

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The radiating element is divided into multiple segments including a meander-shaped radiating unit with multiple meander segments. This segmentation allows the antenna to support multiple resonant modes and frequency bands within a compact structure, thereby increasing operating bandwidth without proportionally increasing antenna dimension

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The meander-shaped radiating unit with its folded configuration effectively nests multiple radiating segments within a compact volume. The multiple meander segments are arranged to fit within a limited space while maintaining the electrical length necessary for wideband operation, achieving bandwidth expansion without proportional volume increase

Inventive Principle:

Principle #7Nested doll (Nesting)

3Adaptability or versatility

If meander-shaped radiating unit with coupling is used, then operating bandwidth is increased, but device complexity increases

Engineering Contradiction:

Improveoperating bandwidthVSAvoidantenna structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The radiating element is divided into multiple segments including a meander-shaped radiating unit with multiple meander segments. This segmentation allows the antenna to support multiple resonant modes and frequency bands within a compact structure, thereby increasing operating bandwidth without proportionally increasing antenna dimension

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The third radiating unit is coupled to the meander-shaped radiating unit through electrical connection, merging their resonant characteristics. This coupling combines the bandwidth contributions of both structures, achieving wideband operation through the integration of multiple radiating elements into a unified antenna system

Inventive Principle:

Principle #5Merging (Combining)

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 effectively increases the operating bandwidth and maintains antenna efficiency, making it suitable for wireless communication systems with wideband requirements such as LTE and Wimax, as demonstrated by improved voltage standing wave ratio (VSWR) and efficiency diagrams.

Implementation Method 1

a second radiating unit, electrically connected to the feed-in terminal, extending from the feed-in terminal toward a second direction, and comprising a meander-shaped element; and a third radiating unit, electrically connected to the grounding element, extending from the grounding element toward the first radiating unit and the second radiating unit, and having one segment parallel to the meander-shaped element, for coupling the meander-shaped element

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS8779986B2Wideband antenna

Publication Date: 2014.07.15 WISTRON NEWEB CORP

AI summary

A wideband antenna includes a grounding element; a feed-in terminal; a first radiating unit, electrically connected to the feed-in terminal and extending from the feed-in terminal toward a first direction; a second radiating unit, electrically connected to the feed-in terminal, extending from the feed-in terminal toward a second direction, and including a meander-shaped element; and a third radiating unit, electrically connected to the grounding element, extending from the grounding element toward the first radiating unit and the second radiating unit, and having one segment parallel to the meander-shaped element, for coupling the meander-shaped element.