Dielectric Filtered Antenna for Frequency Selectivity
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Solution Overview
Problem
Existing ultra-small antennas lack selectivity and sensitivity to specific frequencies, particularly when detecting electromagnetic radiation in different mediums, as they are designed for a specific wavelength and frequency in a vacuum, and fail to effectively filter and detect signals in dielectric materials.
Innovation Solution
The design of an ultra-small antenna structure within a dielectric structure, comprising three portions - two metal portions and one dielectric portion, where the dielectric acts as a filter, allowing only specific wavelengths to pass through, and is formed on a substrate with a detector system and shield to enhance frequency selectivity and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an antenna is designed for a specific wavelength and frequency in a vacuum, then it can detect electromagnetic radiation at that frequency, but it lacks selectivity and sensitivity when detecting signals in dielectric materials
Solution Approach 1:
The antenna is divided into multiple segments with different dielectric materials, each segment having different dimensions and dielectric constants. This segmentation allows each portion to respond to different frequency ranges, providing both precision at specific frequencies and adaptability across a broader spectrum when detecting electromagnetic radiation in various mediums.
2Ease of manufacture
If an antenna structure is simplified for ultra-small dimensions, then manufacturing becomes easier, but selectivity and sensitivity to specific frequencies are reduced
Solution Approach 1:
The antenna employs composite materials with different dielectric constants arranged in specific patterns. This composite structure enables the ultra-small antenna to maintain frequency selectivity and sensitivity by creating multiple resonance paths within the compact form factor, while remaining manufacturable using standard fabrication techniques.
3Length of moving object
If the antenna length is reduced to ultra-small dimensions, then the device size is minimized, but the ability to detect specific frequencies is compromised
Solution Approach 1:
The invention changes the dielectric parameters (dielectric constants) of different antenna portions to compensate for the reduced physical length. By adjusting these electromagnetic parameters rather than relying solely on physical dimensions, the ultra-small antenna maintains accurate frequency detection capability despite its minimized size.
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 enhances the selectivity and sensitivity of the antenna to specific frequencies by filtering electromagnetic waves based on wavelength, allowing only appropriate signals to be detected, thereby improving the detection of electromagnetic radiation in both vacuum and dielectric environments.
Implementation Method 1
the dielectric acts as a filter, allowing only specific wavelengths to pass through
Implementation Method 2
When an electromagnetic wave travels through a dielectric, the velocity of the wave will be reduced and it will effectively behave as if it had a shorter wavelength
Implementation Method 3
When a electromagnetic wave (W) with wavelength λm is incident on the antenna 10, this causes a standing wave (denoted by the dashed line in the drawing) to be formed in the antenna
Implementation Method 4
Antennas are used for detecting electromagnetic radiation (EMR) of a particular frequency
Data Source
AI summary
An antenna system includes a dielectric structure formed on a substrate; an antenna, partially within the dielectric structure, and supported by the dielectric structure; a reflective surface formed on the substrate. A shield blocks radiation from a portion of the antenna and from at least some of the dielectric structure. The shield is supported by the dielectric structure.