Multi-Band Antenna Assembly With Resonant Frequency Adjustment
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Solution Overview
Problem
Existing antenna assemblies in electronic devices have inadequate communication performance and require improvement.
Innovation Solution
The antenna assembly includes a first and second antenna, each with a radiator, signal-source, matching circuit, and adjusting circuit, supporting multiple resonant modes to enhance communication in different frequency bands through parasitic branch coupling and frequency-selective filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas and adjusting circuits are added to support multiple frequency bands, then communication performance and bandwidth are improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by enabling a single antenna assembly to support multiple frequency bands (first, second, and third frequency bands) through multiple resonant modes. The first antenna and second antenna can each operate in different resonant modes to cover various frequency ranges, allowing the electronic device to communicate across LTE and NR bands without requiring separate dedicated antennas for each band, thus improving adaptability while managing complexity.
Solution Approach 2:
The patent applies dynamics through adjusting circuits that can dynamically change the resonant frequency points of the antennas. The first adjusting circuit adjusts the resonant frequency of the first antenna, and the second adjusting circuit adjusts the resonant frequency of the second antenna. This dynamic adjustment capability allows the antenna assembly to adapt to different frequency bands and communication modes, improving versatility without requiring fixed hardware configurations for each band.
2Volume of moving object
If antenna size is reduced to fit electronic devices, then device compactness is improved, but communication performance deteriorates
Solution Approach 1:
The patent implements nesting by placing the first antenna and second antenna in close proximity with a gap between them, where the antennas are positioned to utilize parasitic branch coupling. The first radiator and second radiator are arranged such that they can electromagnetically couple through the gap, allowing the smaller antenna structure to achieve enhanced communication performance through the interaction between the two radiators, effectively fitting compact antenna systems into limited device spaces.
Solution Approach 2:
The patent applies parameter changes by utilizing multiple resonant modes (1/8 wavelength mode, 1/4 wavelength mode) for the antennas. By changing the resonant mode parameters of the first and second antennas through the adjusting circuits, the system can achieve different frequency band coverages and communication performances from the same compact antenna structure, allowing small antennas to maintain versatile communication capabilities across multiple bands.
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 achieves wide bandwidth and improved communication performance by supporting transmission/reception in multiple frequency bands, including LTE and NR, with reduced size and enhanced multiplexing capabilities.
Implementation Method 1
The antenna assembly has a first resonant mode, a second resonant mode, a third resonant mode, and a fourth resonant mode. The first resonant mode is a 1/8 wavelength mode of the second antenna, the second resonant mode is a 1/4 wavelength mode from the first adjusting circuit to a gap between the first radiator and the second radiator, the third resonant mode is a 1/4 wavelength mode of the second antenna, and the fourth resonant mode is a 1/4 wavelength mode from the second signal-source to the gap between the second radiator and the first radiator.
Implementation Method 2
the first adjusting circuit is electrically connected to the first matching circuit or the first radiator, and configured to adjust a resonant frequency-point of the first antenna to make the first antenna support transmission/reception of an electromagnetic wave signal in a first frequency band. The second adjusting circuit is electrically connected to the second matching circuit or the second radiator, and configured to adjust a resonant frequency-point of the second antenna to make the second antenna support transmission/reception of an electromagnetic wave signal in a second frequency band and a third frequency band.
Data Source
AI summary
An antenna assembly includes a first antenna and a second antenna. The first antenna includes a first radiator, a first signal-source, a first matching circuit, and a first adjusting circuit. The first signal-source is electrically connected to the first matching circuit to the first radiator, and the first adjusting circuit is configured to adjust a resonant frequency-point of the first antenna to make the first antenna support an electromagnetic wave signal in a first frequency band. The second antenna includes a second radiator, a second signal-source, a second matching circuit, and a second adjusting circuit. The second signal-source is electrically connected to the second matching circuit to the second radiator, the second adjustment circuit is configured to adjust a resonant frequency-point of the second antenna to make the second antenna support an electromagnetic wave signal in a second frequency band and a third frequency band.