Multiband Antenna Structure With Ground Isolation Plate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Metallic components in wireless communication devices often interfere with the performance of internal antennas, necessitating an antenna structure that can maintain good performance within a metallic housing.
Innovation Solution
A multiband antenna structure incorporating a planar inverted-F antenna (PIFA) design with radiators forming loop and S-shaped structures, and adjustable slots to optimize current flow and resonance modes, allowing for efficient operation across different frequency bands while being integrated with a metallic frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic members are used to form partial housing for enhancing structural strength and improving aesthetics, then structural strength and aesthetics are improved, but antenna performance deteriorates
Solution Approach 1:
A ground isolation structure is introduced as an intermediary component between the metallic housing and the antenna ground. This structure includes a ground isolation plate positioned between the antenna ground and the metallic housing, effectively decoupling the harmful electromagnetic coupling while maintaining structural integrity. The ground isolation structure acts as a mediator that allows the metallic housing to provide mechanical strength without directly interfering with antenna performance
Solution Approach 2:
The patent modifies the electrical parameters of the antenna system by introducing the ground isolation structure, which changes the impedance characteristics and electromagnetic field distribution. By adjusting the position, size, and material properties of the ground isolation plate, the antenna's resonant frequency and impedance matching can be optimized to compensate for the presence of metallic housing
2Reliability
If antenna structure is designed to achieve good performance within metallic housing, then antenna performance is improved, but device complexity increases
Solution Approach 1:
The ground isolation structure is divided into distinct segments including a ground isolation plate and optional supporting pillars. This segmentation allows for independent optimization of each component's function - the plate provides electromagnetic isolation while the pillars provide mechanical support. The modular segmented structure simplifies the overall design by separating different functional requirements into independent elements that can be designed and adjusted separately
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 antenna structure achieves efficient reception and transmission of signals across multiple frequency bands, including GPS, Wi-Fi, with improved radiating capability and size reduction of the device, while minimizing interference from the metallic housing.
Implementation Method 1
The radiating section generates a frequency-doubled effect and is coupled to the slot for resonating a third mode
Implementation Method 2
The current flowing through the matching section, the first connection section, the second connection section, the third connection section, and the fourth connection section resonates a first mode; The current flowing through the matching section, the first radiation section, the second radiation section, the third radiation section, and the fourth radiation section resonates a second mode; The first radiator is coupled with the slot for resonating a third mode
Data Source
AI summary
A multiband antenna structure includes a matching portion, a first radiator, and a second radiator. The first radiator and the second radiator extend from a first edge of the matching portion. The second radiator and the matching portion resonate a first mode. The first radiator and the matching portion resonate a second mode. The slot, the first radiator, and the matching portion resonate a third mode. The second radiator includes a first connection section, a second connection section, a third connection section, and a fourth connection section. The first connection section is perpendicularly connected to a first end of the first edge. The second connection section is perpendicularly connected to the first connection section and extends parallel to the first edge. The third connection section is parallel to the first connection section. The fourth connection section is parallel to the second connection section.