Bent Slot Antenna Structure for Wideband Dual-Mode Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of achieving high-speed data transmission in electronic devices with limited antenna volume and ensuring good isolation between multiple antennas is critical, as existing designs struggle to cover a wide frequency range and require improved operating modes.
Innovation Solution
The implementation of a symmetrical or asymmetrical antenna structure that excites both common and differential modes using a single feed unit, utilizing a slitted loop design with radiators disposed in a bent manner to extend the operating bandwidth and enable co-radiator dual-antenna functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna volume is minimized to fit limited space in electronic devices, then the antenna can be integrated into compact devices, but the frequency range coverage is reduced
Solution Approach 1:
The antenna is divided into multiple radiators (first radiator and second radiator) with distinct functions. Each radiator can be independently designed to resonate at different frequency ranges, allowing the compact antenna structure to cover a broader frequency spectrum by combining the capabilities of segmented elements.
Solution Approach 2:
The patent employs asymmetrical feeding configurations where the first and second radiators are fed with different phases or amplitudes. This asymmetrical excitation enables the antenna to generate multiple operating modes (common mode and differential mode) from a single symmetrical physical structure, extending frequency coverage without increasing volume.
2Adaptability or versatility
If multiple antennas are added to support various functional applications, then the functional versatility is improved, but the isolation between antennas deteriorates
Solution Approach 1:
The single antenna structure is designed to perform multiple functions by supporting both common mode and differential mode operations. This multi-functionality allows the antenna to serve different communication standards and frequency bands without requiring separate antennas, thereby maintaining isolation while achieving functional versatility.
Solution Approach 2:
The antenna employs dynamic switching between different operating modes (common mode and differential mode) through controllable feeding mechanisms. This dynamic capability allows the system to adaptively select appropriate modes for different functional applications, effectively providing multiple antenna functions from a single structure while maintaining isolation.
3Device complexity
If a single antenna structure is used to cover maximum frequency range, then the device complexity is reduced, but the operating bandwidth is limited
Solution Approach 1:
The antenna structure is pre-designed with symmetrical geometry that inherently supports both common mode and differential mode resonances. This preliminary structural configuration enables the antenna to naturally operate across multiple frequency bands without requiring complex real-time adjustments or additional components, thus maintaining simplicity while achieving wide bandwidth.
Solution Approach 2:
The patent utilizes parameter changes in the feeding system (phase, amplitude, and excitation points) to switch between different operating modes. By dynamically adjusting these parameters, the single antenna structure can adapt its electrical characteristics to cover different frequency ranges, effectively expanding operating bandwidth without increasing structural complexity.
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 achieves a broader frequency coverage with a limited volume by utilizing multiple operating modes, enhancing isolation and efficiency in wireless communications.
Implementation Method 1
When the antenna structure is symmetrical, a common mode and a differential mode may be respectively excited through symmetrical feed and anti-symmetrical feed. Because radiation generated by the two modes is integrally orthogonal in far field, the antenna structure may be used as a co-radiator dual-antenna structure.
Implementation Method 2
a slot is formed between the first end of the first radiator and the first end of the second radiator. The first radiator and the second radiator are disposed in a bent manner, and a spatial region formed between the first radiator, the second radiator, and the slot is T-shaped.
Data Source
AI summary
Electronic devices and antenna structures are described. An example electronic device includes an antenna structure, wherein the antenna structure includes: a first radiator and a second radiator, wherein the first radiator includes a first end and a second end, and the second radiator includes a first end and a second end. The first end of the first radiator and the first end of the second radiator face each other and are not in contact with each other, and a slot is formed between the first end of the first radiator and the first end of the second radiator. The first radiator and the second radiator are disposed in a bent manner, and a spatial region formed between the first radiator, the second radiator, and the slot is T-shaped; and the second end of the first radiator is grounded, and the second end of the second radiator is grounded.