Laminated Split Ring Antenna for Multi-Band Signal Isolation
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Solution Overview
Problem
Existing antenna technologies fail to effectively form multiple split ring resonators for different frequency bands on a printed substrate, leading to signal leakage issues between antennas operating at various frequency bands.
Innovation Solution
The design incorporates a layered structure with alternating dielectric and conductor layers, featuring first and second split ring portions, conductor vias, and a feeder line, where the electrostatic capacitance is adjusted to minimize signal leakage between antennas resonating at different frequencies by optimizing the length and position of split portions and feeder lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple split ring resonators for different frequency bands are formed on a printed substrate, then the device can operate in multiple frequency bands, but signal leakage occurs from higher frequency antennas to lower frequency antennas
Solution Approach 1:
The patent divides the antenna structure into multiple independent split ring resonators, each operating at a different frequency band. Each resonator is segmented with gaps that can be independently controlled, allowing frequency-specific operation and reducing interference between bands
Solution Approach 2:
The patent applies different structural characteristics to different parts of the antenna system. Each split ring resonator has locally optimized gap positions, sizes, and orientations tailored to its specific frequency band, enabling selective signal reception while minimizing leakage to other bands
2Adaptability or versatility
If multiple antennas for different frequency bands are provided, then various communication purposes are supported, but the device size increases
Solution Approach 1:
The patent combines multiple frequency band antennas into a single integrated structure using split ring resonators. Multiple resonators are arranged in a compact configuration where they share common structural elements and substrate space, achieving multi-band functionality without proportionally increasing device area
Solution Approach 2:
The patent arranges split ring resonators of different frequency bands in a nested or overlapping configuration. Smaller resonators for higher frequencies are positioned within or adjacent to larger resonators for lower frequencies, maximizing space utilization and reducing overall device footprint
3Area of stationary object
If split ring resonators are placed in close proximity, then device size is reduced, but signal leakage between antennas increases
Solution Approach 1:
The patent introduces dielectric materials and structural barriers as intermediaries between adjacent split ring resonators. These intermediary elements act as electromagnetic shields that attenuate signal leakage between closely spaced resonators while maintaining compact overall dimensions
Solution Approach 2:
The patent utilizes vertical layering and three-dimensional arrangement of split ring resonators to reduce signal leakage. By stacking resonators at different heights or using multi-layer substrate configurations, the design achieves frequency isolation through spatial separation in the vertical dimension while maintaining compact horizontal footprint
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 reduces signal leakage from higher frequency band antennas to lower frequency band antennas, allowing for efficient operation of multiple frequency bands without increasing device size, even when antennas are in close proximity.
Implementation Method 1
a first split ring resonator antenna which resonates at a first frequency, and a second one of the structures constitutes a second split ring resonator antenna which resonates at a second frequency
Implementation Method 2
adjusting the antenna device in such a manner that an electrostatic capacitance between counter electrodes of the first split ring resonator antenna is increased
Implementation Method 3
a plurality of conductor vias which are formed away from each other at an interval circumferentially while sandwiching the first split portion and the second split portion, and the plurality of conductor vias electrically connecting the first split ring portion and the second split ring portion
Implementation Method 4
a feeder line which is formed on a specific one of the conductor layers, with one end of the feeder line electrically connected to at least one of the conductor vias
Data Source
AI summary
Disclosed is an antenna device or the like having a split ring resonator that adapts to different frequency bands. An antenna device has a laminated structure that is composed by alternating dielectric layers (DL) (35) and conductor layers (CL) and that includes a plurality of structures each comprising: a first split ring (first SR) (31) that is formed in a first conductor layer (first CL) (36A) extending along one surface of a DL (35), surrounds an opening (2) and has a first split (first SP) (51) formed in a circumferential portion along the opening (2); a second split ring (second SR) (32) that is formed in a second conductor layer (second CL) (36B), which extends along the other surface of the DL (35), in such a manner that the second SR (32) is opposed to the first SR (31), the second SR (32) surrounding the opening (2) and having a second split (second SP) (52) formed in a circumferential portion along the opening (2); a plurality of conductor vias (CVs) (3) that are circumferentially formed at intervals, sandwich the first SP (51) and second SP (52) and electrically connect the first SR (31) to the second SR (32); and a feeder line (4) that is formed in a particular one of the CLs and has one end electrically connected to at least one of the CVs (3) and the other end insulated from the particular CL by a clearance (39) formed in the particular CL along the extending direction of the particular CL.