Antenna Resonance Path Design for MIMO Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile devices with limited hardware space, such as smartwatches, are unable to support multi-input multi-output (MIMO) techniques due to space constraints and interference from electronic elements, leading to reduced communication quality.
Innovation Solution
A mobile device design that includes a first antenna, a second antenna, a connection element, and an extension element, where the connection element and extension element form non-overlapping resonance paths between the antennas, allowing the device to operate in multiple frequency bands and support MIMO techniques, while enhancing communication quality through improved impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mobile device is equipped with only one WiFi antenna due to limited hardware space, then the device can be manufactured with simpler structure and lower cost, but the device fails to support MIMO technique and has reduced communication quality
Solution Approach 1:
The first antenna is designed to serve multiple functions: it acts as a WiFi antenna in the first frequency band and as a GPS antenna in the second frequency band. This multi-functionality allows the device to support MIMO for WiFi communication while maintaining space constraints, as the same physical antenna structure is utilized across different frequency bands without requiring additional antenna elements.
Solution Approach 2:
The patent utilizes frequency band as an additional dimension to resolve the space constraint. By operating the first antenna in multiple frequency bands (first band for WiFi, second band for GPS), the system effectively creates virtual antenna elements through frequency division, enabling MIMO capability without adding physical antenna structures in the spatial domain.
2Volume of moving object
If electronic elements are placed close to antennas in a compact mobile device, then the device can maintain small form factor, but the radiation characteristics of antennas are degraded leading to reduced communication quality
Solution Approach 1:
A connection element is introduced as an intermediary component between the first antenna and the second antenna. This connection element serves as a spatial separator that electrically connects the two antennas while physically distancing them from each other and from sensitive electronic elements. The connection element acts as a mediator that maintains the electrical connectivity required for MIMO operation while providing the spatial isolation needed to preserve radiation characteristics and minimize interference.
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
Enables the mobile device to support MIMO techniques and improve communication quality by allowing operation in multiple frequency bands and enhancing radiation characteristics, with the extension element improving impedance matching between antennas.
Implementation Method 1
The first antenna operates in a first frequency band through a first resonance path extending from the first feeding point to the first open-circuit terminal. The second antenna operates in the first frequency band through a second resonance path extending from the second feeding point to the second open-circuit terminal.
Implementation Method 2
The first antenna operates in a first frequency band through a first resonance path extending from the first feeding point to the first open-circuit terminal. The first antenna operates in a second frequency band through the third resonance path.
Data Source
AI summary
A mobile device includes a carrying element, a first antenna, a second antenna, a connection element, and an extension element. The first antenna and the second antenna are disposed on the carrying element. The first antenna operates in a first frequency band through a first resonance path. The second antenna operates in the first frequency band through a second resonance path. The connection element is electrically connected to the first antenna and the second antenna. The connection element, the first antenna and the second antenna form a connection path, and the connection path, the first resonance path and the second resonance path do not overlap one another. The extension element is electrically connected to the connection element. The extension element, the connection element and the first antenna form a third resonance path, and the first antenna operates in a second frequency band through the third resonance path.