Multiband Antenna with Segmented Dielectric Resonators
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Solution Overview
Problem
Existing small-sized radio devices face challenges with internal multiband antennas that are large in size, consume considerable space, and have intertwined resonance frequencies, making tuning difficult and increasing production costs.
Innovation Solution
A multiband antenna design featuring a dielectric element with a conductive coating and a resonant structure that electrically isolates different portions to form independent resonators for each frequency band, allowing for separate tuning and reduced space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single dielectric antenna component is used for multiple frequency bands, then space on the circuit board is reduced, but the antenna structure becomes more complicated and tuning becomes difficult
Solution Approach 1:
The antenna element is divided into multiple independent segments (first antenna element, second antenna element, third antenna element) that can be independently tuned. Each segment is associated with a specific frequency band, allowing separate resonance frequency adjustment without affecting other bands. This segmentation resolves the contradiction by enabling multi-band operation with independent tuning capability within a single integrated component.
Solution Approach 2:
Different portions of the antenna component are designed with different electrical characteristics and resonance properties. The first antenna element has different dimensions and resonant frequency than the second and third elements. This local differentiation allows each segment to be optimized for its specific frequency band while maintaining overall integration, thus reducing circuit board space without sacrificing tuning independence.
2Ease of operation
If separate chip-type antenna components are used for each frequency band, then independent tuning is achieved, but additional space and feed components are required
Solution Approach 1:
Multiple antenna elements that would traditionally require separate components are merged into a single integrated antenna component. The first, second, and third antenna elements are all mounted on or integrated with the same dielectric substrate and share common feed structures. This merging achieves space savings while maintaining independent tuning capability through the segmented element design.
Solution Approach 2:
The single antenna component serves multiple functions by supporting multiple frequency bands through its segmented elements. The dielectric substrate and feed structures serve universal purposes for all three antenna elements, eliminating the need for separate feed components for each band. This multi-functionality resolves the contradiction by providing both space efficiency and independent tuning.
3Length of moving object
If the antenna element size is reduced using high permittivity dielectric material, then physical size is reduced, but the antenna component becomes larger and consumes more space
Solution Approach 1:
The antenna elements extend in multiple dimensions including vertical extension beyond the dielectric substrate surface. The first antenna element extends in a first direction, the second in a second direction, and the third in a third direction. This multi-dimensional arrangement allows compact packaging that reduces the overall footprint and volume consumption while maintaining the electrical size needed for resonance at different frequencies.
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 enables a compact antenna design with independent frequency tuning, reducing space consumption and production costs while maintaining high efficiency across multiple frequency bands.
Implementation Method 1
a resonant structure formed between the first portion and the second portion to electrically isolate the first portion and the second portion at a first frequency, and to form first and second resonators
Implementation Method 2
The size compared to an air-insulated antenna can be reduced by using dielectric material under the radiating plane. The higher the permittivity of the material is, the smaller the antenna element having a certain electrical size is physically.
Data Source
AI summary
A multiband antenna, and component for implementing a multiband antenna for, e.g., a small-sized radio device. In one embodiment, the antenna component comprises a simple and reliable dielectric substrate, the conductive coating of which forms a radiating element. This has a plurality (e.g., two) resonances for forming separate operating bands. The lower resonance is based on the entire element, and the upper resonance on the head part of the element. The conductive coating has a pattern, which functions as a parallel resonance circuit between the head part and the tail part of the element. The natural frequency of this parallel resonance circuit is in the range of the upper operating band of the antenna. The resonance frequencies of the antenna and thus its operating bands can be tuned independently of each other so that the tuning cycle need not be repeated.