Antenna Apparatus with Frequency Selection Network for Compact Multi-Band Operation

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Solution Overview

Problem

Existing terminal antennas are large in size and costly, particularly due to the need for supports in multi-mode communication systems like LTE, which require wide band coverage.

Innovation Solution

An antenna apparatus with a high-pass low-cut device and a first low-pass high-cut device connected in series between the antenna body and the feeding terminal, allowing for operation across multiple frequency bands while being compact enough to be printed on a PCB, reducing size and cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional antenna with a support is used for multi-mode communication, then wide band coverage is achieved, but the antenna size becomes large and costs increase

Engineering Contradiction:

Improvefrequency band coverageVSAvoidantenna size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The invention extracts and removes the support structure from the conventional antenna design. By eliminating the support, the antenna can be directly printed on the PCB surface, reducing the antenna's volume and height while maintaining its multi-frequency band coverage capability through the frequency selection network

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention merges the antenna with the PCB by printing the antenna directly on the PCB surface. This integration eliminates the need for a separate support structure and reduces the overall antenna volume, while the frequency selection network enables multi-mode communication functionality

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If a conventional antenna with a support is used for multi-mode communication, then wide band coverage is achieved, but manufacturing costs increase

Engineering Contradiction:

Improvefrequency band coverageVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The frequency selection network serves multiple functions: it enables multi-frequency band operation, acts as a filtering network, and integrates with the PCB structure. This multi-functionality reduces the need for separate components, simplifying manufacturing and reducing costs

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

The solution ensures coverage of multiple frequency bands with a smaller size and lower costs compared to traditional antennas, making it suitable for ultra-thin mobile devices and reducing support costs.

Implementation Method 1

a high-pass low-cut device and a first low-pass high-cut device are added between a legacy antenna body and feeding terminal such that performance of the antenna can be ensured, that is, it is ensured that enough frequency bands are covered by the antenna

Methodology Applied

Scientific EffectHigh-pass low-cut filtering: Filter (electronic)

Implementation Method 2

a high-pass low-cut device and a first low-pass high-cut device are added between a legacy antenna body and feeding terminal such that performance of the antenna can be ensured

Methodology Applied

Scientific EffectLow-pass high-cut filtering: Filter (electronic)

Data Source

PatentUS10305169B2Antenna apparatus and terminal

Publication Date: 2019.05.28 HUAWEI TECH CO LTD

AI summary

An antenna apparatus includes a feeding terminal, a high-pass low-cut device, a first low-pass high-cut device, and an antenna body, where the high-pass low-cut device is electrically connected in series between a first free end of the antenna body and the feeding terminal, and the first low-pass high-cut device is electrically connected in series between a second free end of the antenna body and the feeding terminal.