Substrate Antenna With Dual-Surface Joint Patterns
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Solution Overview
Problem
Existing substrate antennas are limited to configuring a single resonance frequency band on a thin substrate, preventing full utilization of the substrate's potential.
Innovation Solution
A substrate antenna design featuring loop-like joint patterns on both surfaces of a dielectric substrate, allowing for electrostatic capacitive and magnetic inductive coupling, enabling the configuration of multiple antennas with different resonance frequency bands using shared feeding and earth points, and potentially adding a third antenna by stacking substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single resonance frequency band antenna is configured on a thin substrate, then the substrate antenna structure is simple, but the substrate potential cannot be fully utilized
Solution Approach 1:
The patent divides the antenna system into multiple independent joint patterns (first joint pattern, second joint pattern, third joint pattern) that can be configured on different surfaces of the substrate. Each joint pattern operates at different resonance frequency bands, allowing the substrate to support multiple frequency bands simultaneously while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent utilizes the third dimension by configuring joint patterns on both the front surface and back surface of the substrate. This spatial arrangement allows multiple antennas to coexist on a thin substrate without significant interference, enabling multi-frequency band operation while keeping the substrate thickness minimal.
2Adaptability or versatility
If multiple antennas with different resonance frequency bands are configured on a thin substrate, then the substrate potential is fully utilized, but the configuration becomes complex
Solution Approach 1:
The patent employs a common feeding mechanism that can supply signals to multiple joint patterns simultaneously. The feeding structure is designed to excite different joint patterns at their respective resonance frequencies, allowing a single feeding system to control multiple antennas operating in different frequency bands, thereby reducing overall system complexity.
Solution Approach 2:
The substrate itself acts as an intermediary that provides electrostatic capacitive coupling and magnetic inductive coupling between the joint patterns on opposite surfaces. This natural coupling mechanism simplifies the connection between multiple antennas, eliminating the need for complex external coupling structures.
3Device complexity
If multiple antennas share common feeding and earth points, then the overall configuration is simplified, but signal interference between frequency bands may occur
Solution Approach 1:
The substrate serves as an intermediary that provides frequency-selective coupling between the common feeding point and different joint patterns. The electrostatic capacitive coupling and magnetic inductive coupling through the substrate are tuned to different resonance frequencies, allowing the common feeding system to selectively excite different antennas at different frequencies while minimizing interference.
Solution Approach 2:
The patent optimizes the electrical parameters (capacitance, inductance) of the coupling paths between the common feeding point and each joint pattern. By adjusting these parameters, each antenna can be tuned to its specific resonance frequency, enabling frequency separation and reducing interference even with shared feeding and earth points.
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 design simplifies the configuration of multiple antennas on a single thin substrate, allowing for simultaneous transmission and reception of signals across different frequency bands with shared feeding and earth points, achieving a combined gain in frequency bands and enabling band widening with high antenna gain.
Implementation Method 1
a first joint pattern and a second joint pattern are electrostatic capacitively-coupled via the electrostatic capacitance of the substrate
Implementation Method 2
a first joint pattern and a second joint pattern are electrostatic capacitively-coupled via the electrostatic capacitance of the substrate and magnetic inductively-coupled
Data Source
AI summary
The simply configured substrate antenna has a plurality of antennas. A loop-like first joint pattern one spot of which is divided is formed in one-side substrate surface of a substrate composed of a dielectric material. Antenna elements that configure a first antenna are respectively connected to both ends of the first joint pattern at the divided position. A loop-like second joint pattern one spot of which is divided is formed in the other-side substrate surface at a position opposite to the first joint pattern. Antenna elements that configure a second antenna are respectively connected to both ends of the second joint pattern at the divided position. The first and second antennas are set to approximately the same or different resonance frequency bands. Feeding and ground points connected to and formed in the first joint pattern are held in common to transmit or receive a transmission/reception signal.