Switchable Parasitic Antenna Structure for Electrical Beam Scanning

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Solution Overview

Problem

Current terminal antenna technologies face challenges in controlling the antenna radiation pattern through electrical scanning and achieving high directivity, especially at high frequencies.

Innovation Solution

The proposed antenna structure includes a driven element and at least two parasitic elements, where each parasitic element is equipped with a switch control module that can adjust its electrical length by switching between different statuses, allowing for controlled electrical signal scanning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional terminal antenna technologies are used, then the antenna structure is simple, but the radiation pattern cannot be controlled by electrical scanning and directivity is low

Engineering Contradiction:

Improveradiation pattern controlVSAvoidantenna structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the parasitic elements adjustable through switch control modules that can change their electrical length dynamically. This allows the antenna radiation pattern to be controlled by electrical scanning, transforming a static antenna structure into a dynamic one that can adapt its radiation characteristics electronically without mechanical movement.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the electrical length parameter of parasitic elements by controlling switch statuses. Each parasitic element is equipped with a switch control module that can adjust its electrical length to different values, thereby changing the radiation pattern and achieving electrical scanning capability through parameter modification rather than structural redesign.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If high-frequency data transmission is implemented, then transmission capacity increases, but the impact of antenna directivity on performance becomes more obvious and harder to control

Engineering Contradiction:

Improvedata transmission capacityVSAvoiddirectivity control

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

To address the difficulty of controlling directivity at high frequencies, the patent modifies the electrical length parameter of parasitic elements through switch control. By adjusting these parameters electronically, the radiation pattern and directivity can be controlled effectively at high frequencies without requiring complex mechanical adjustment mechanisms.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces potential mechanical adjustment mechanisms with electrical control through switch modules. This substitution allows for precise control of antenna directivity at high frequencies through electrical signals, avoiding the complexity and reliability issues associated with mechanical systems operating at high frequencies.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If parasitic elements with switch control modules are added, then electrical scanning and directivity are improved, but device complexity increases

Engineering Contradiction:

Improveelectrical scanning capabilityVSAvoidantenna structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent segments the antenna system into a driven element and multiple parasitic elements, each with its own switch control module. This segmentation allows independent control of each parasitic element's electrical length, enabling electrical scanning capability while distributing the complexity across modular units rather than requiring a completely redesigned complex system.

Inventive Principle:

Principle #1Segmentation

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 solution enables improved directional performance of the antenna structure by controlling the radiation pattern along a circumferential plane, enhancing the antenna's ability to manage high-frequency signal propagation effectively.

Implementation Method 1

each parasitic element is provided with a switch control module, where the switch control module has at least two switch statuses, and each of the switch statuses of the switch control module corresponds to one electrical length of the parasitic element

Methodology Applied

Scientific EffectElectrical length adjustment through switching:

Implementation Method 2

the control signal is used to control a switch status of the switch control module, so that the antenna structure performs electrical signal scanning in the scanning direction

Methodology Applied

Scientific EffectElectrical signal scanning:

Data Source

PatentUS12266858B2Antenna structure, terminal and control method

Publication Date: 2025.04.01 VIVO MOBILE COMM CO LTD

AI summary

An antenna structure includes a driven element and at least two parasitic elements. The at least two parasitic elements are disposed around the driven element and spaced apart from the driven element. Each parasitic element is provided with a switch control module, the switch control module has at least two switch statuses, and each of the switch statuses of the switch control module corresponds to one electrical length of the parasitic element.