Capacitively Coupled Multifeed Antenna for Multi-Band RF Footprint Reduction
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Solution Overview
Problem
Spatial constraints in devices limit the effectiveness of antenna systems for RF communications, as they require multiple unique antenna systems for different frequency bands, leading to increased footprint and complexity.
Innovation Solution
A multifeed antenna system with capacitively coupled feed elements and a common antenna loop element that acts as a radiating structure for multiple frequency bands, reducing the footprint by using isolated magnetic dipole feed elements with capacitively coupled regions for improved capacitive coupling and frequency filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple unique antenna systems are used for different frequency bands, then frequency coverage is improved, but device footprint and complexity increase
Solution Approach 1:
The patent implements a single antenna system that serves multiple frequency bands through capacitive coupling mechanisms. The feed elements with capacitive structures can couple to the resonant structure at different frequencies, allowing one antenna to perform multiple functions that traditionally required separate antennas for each frequency band.
Solution Approach 2:
The patent utilizes capacitive coupling parameters to adjust the resonant frequencies of the feed elements. By changing the capacitive coupling strength and electrical characteristics, the same physical structure can operate at different frequency bands, enabling frequency agility without requiring multiple fixed-structure antennas.
2Adaptability or versatility
If multiple unique antenna systems are used for different frequency bands, then frequency coverage is improved, but system complexity increases
Solution Approach 1:
The patent implements a single antenna system that serves multiple frequency bands through capacitive coupling mechanisms. The feed elements with capacitive structures can couple to the resonant structure at different frequencies, allowing one antenna to perform multiple functions that traditionally required separate antennas for each frequency band.
Solution Approach 2:
The patent combines multiple feed elements with different capacitive coupling characteristics into a single integrated antenna system. This merging of multiple functional elements into one unified structure reduces the overall system complexity compared to having separate antenna assemblies for each frequency band.
3Reliability
If capacitively coupled regions are added to feed elements, then capacitive coupling and frequency filtering are improved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the capacitive coupling function into separate, discrete capacitive structures that are attached to or integrated with the feed elements. This separation allows the capacitive components to be manufactured independently and then assembled, potentially simplifying the overall manufacturing process compared to creating a completely integrated complex structure.
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 reduces the antenna system's footprint and complexity by using a common radiating element for multiple frequency bands, enhancing signal sensitivity and performance while minimizing detuning effects from environmental factors.
Implementation Method 1
The at least one antenna feed element can be capacitively coupled to the antenna loop element. The at least one antenna feed element can include one or more capacitively coupled regions. The one or more capacitively coupled regions can form at least a portion of the capacitive coupling of the at least one antenna feed element to the antenna loop element.
Data Source
AI summary
An antenna system, such as a multifeed antenna system, can include at least one antenna feed element. The antenna system can include an antenna loop element. The at least one antenna feed element can be capacitively coupled to the antenna loop element. The at least one antenna feed element can include one or more capacitively coupled regions. The one or more capacitively coupled regions can form at least a portion of the capacitive coupling of the at least one antenna feed element to the antenna loop element.