Planar Array Antenna Layout for Wideband Resonator Coupling

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Solution Overview

Problem

Implementing a compact antenna with a wide band operating frequency using a planar antenna is difficult, and there is a demand for an antenna with a high degree of freedom in design.

Innovation Solution

The antenna design includes first and second resonators extending in a plane direction, a third resonator magnetically or capacitively connected to both, a reference conductor surrounding the third resonator, and feeder lines connecting the resonators, allowing for a high degree of freedom in design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a planar antenna structure is used, then the antenna can be made compact and easy to manufacture, but it is difficult to achieve wide band operating frequency

Engineering Contradiction:

Improveease of manufactureVSAvoidband operating frequency

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The antenna is divided into multiple resonators (first resonator, second resonator, third resonator) that are spatially separated and independently designed. Each resonator can be optimized for specific frequency ranges, allowing the overall antenna to achieve wideband operation while maintaining a compact planar structure that is easy to manufacture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from traditional two-dimensional planar resonators to three-dimensional resonator structures with elements extending in multiple directions (first direction, second direction, third direction). This dimensional expansion enables wider bandwidth operation while maintaining compact footprint and manufacturability through standardized 3D printing or layer-by-layer fabrication processes.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple resonators are introduced to achieve wide band operation, then the operating frequency range is improved, but the device complexity increases

Engineering Contradiction:

Improveband operating frequencyVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple resonators (first, second, and third resonators) are merged into a single integrated antenna structure with shared feed lines and common grounding. The resonators are positioned and connected to work together as a unified system, achieving wideband operation without proportionally increasing complexity through shared components and coordinated design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The feed line structure is designed to serve multiple functions: it feeds the first resonator, connects to the second resonator, and provides grounding through the third resonator. This multi-functional feed design reduces the number of separate components needed, maintaining manageable complexity while achieving wideband performance through multiple resonant modes.

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 design provides an antenna with a wide band operating frequency and improved radiation characteristics, achieving gains and efficiencies across a range of frequencies.

Implementation Method 1

a third resonator that is positioned between the first resonator and the second resonator in the first direction and is magnetically or capacitively connected to or electrically connected to each of the first resonator and the second resonator

Methodology Applied

Scientific EffectMagnetic coupling: Electromagnetic Induction

Implementation Method 2

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Implementation Method 3

a reference conductor extending in the first plane direction, positioned between the first resonator and the second resonator in the first direction, and serving as a potential reference of the first resonator and the second resonator

Methodology Applied

Scientific EffectElectromagnetic reference potential: Electric Field

Data Source

PatentUS12401125B2Antenna and array antenna

Publication Date: 2025.08.26 KYOCERA CORP

AI summary

An antenna includes a first resonator extending in a first plane direction; a second resonator spaced apart from the first resonator in a first direction and extending in the first plane direction; a third resonator positioned between the first resonator and the second resonator in the first direction and magnetically or capacitively connected to or electrically connected to each of the first resonator and the second resonator; a reference conductor extending in the first plane direction, positioned between the first resonator and the second resonator in the first direction, and serving as a potential reference of the first resonator and the second resonator; and a feeder line connected to the first resonator. The reference conductor surrounds at least a part of the third resonator in the first plane direction.