Multi-band Antenna Structure Using Nested Radiation Parts
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Solution Overview
Problem
Designing a compact antenna structure for mobile electronic devices that can efficiently transmit and receive radio frequency signals across multiple frequency bands is challenging due to size constraints and the need to avoid interference from other device elements.
Innovation Solution
A miniaturized antenna structure featuring a grounding plane, multiple radiation parts, a metal coupling part, and a feeding point, which utilizes the monopole antenna principle to transmit and receive signals across various frequency bands by adjusting excitation paths and impedance matching, allowing for efficient operation in multiple frequency bands without increasing the antenna's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna size is increased to improve transceiving capability, then the transceiving performance is improved, but the device size and weight increase
Solution Approach 1:
The patent implements a nested antenna structure where multiple radiation elements (first radiation part, second radiation part, third radiation part) are arranged in a compact, space-efficient configuration. The elements are positioned at different heights and orientations, with some elements nested within the spatial envelope of others, allowing multiple frequency bands to be supported without increasing overall device footprint or weight.
Solution Approach 2:
The patent transitions from traditional planar antenna layouts to a three-dimensional structure with radiation elements positioned at different vertical heights (first height above grounding plane, second height above grounding plane). This vertical dimensionality allows multiple radiation parts to coexist without spatial interference, enabling multi-band operation in a compact form factor that does not increase device weight.
2Reliability
If the antenna size is increased to improve transceiving capability, then the transceiving performance is improved, but the device volume increases
Solution Approach 1:
The patent implements a nested antenna structure where multiple radiation elements (first radiation part, second radiation part, third radiation part) are arranged in a compact, space-efficient configuration. The elements are positioned at different heights and orientations, with some elements nested within the spatial envelope of others, allowing multiple frequency bands to be supported without increasing overall device footprint or weight.
Solution Approach 2:
The patent transitions from traditional planar antenna layouts to a three-dimensional structure with radiation elements positioned at different vertical heights (first height above grounding plane, second height above grounding plane). This vertical dimensionality allows multiple radiation parts to coexist without spatial interference, enabling multi-band operation in a compact form factor that does not increase device volume.
3Adaptability or versatility
If multiple antennas are added to support multiple frequency bands, then the frequency band coverage is improved, but the device complexity increases
Solution Approach 1:
The patent designs a universal antenna structure where a single integrated antenna system supports multiple frequency bands (first frequency band, second frequency band, third frequency band) through multiple radiation parts. Each radiation part can be independently excited or combined, allowing the same physical structure to serve multiple communication standards and frequency ranges, thereby reducing the need for separate antennas for each band.
Solution Approach 2:
The patent merges multiple radiation elements (first radiation part, second radiation part, third radiation part) into a single integrated antenna structure shared by both monopole and dipole configurations. This combined structure allows the antenna system to support multiple frequency bands and polarization modes without requiring separate antenna assemblies, thereby reducing overall device complexity.
4Weight of moving object
If the antenna structure is miniaturized, then the device size is reduced, but the transceiving efficiency decreases
Solution Approach 1:
The patent implements a dynamic antenna structure where the monopole and dipole configurations can be selectively activated or combined based on the required frequency band and polarization. The radiation parts can be independently controlled, allowing the antenna system to optimize its electrical length and radiation characteristics for each operating condition, thereby maintaining high transceiving efficiency despite the miniaturized physical size.
Solution Approach 2:
The patent changes the electrical parameters of the antenna structure by adjusting the effective electrical length of radiation parts through selective excitation and combining of monopole/dipole modes. By dynamically adjusting the electrical characteristics rather than relying solely on physical size, the miniaturized antenna maintains resonant frequencies and impedance matching appropriate for each frequency band, preserving transceiving efficiency.
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 effectively transmits and receives radio frequency signals across multiple frequency bands, including LTE and GSM standards, while maintaining high efficiency and impedance matching, thus achieving the goal of miniaturization without compromising performance.
Implementation Method 1
The antenna structure includes a grounding plane, a first radiation part, a second radiation part, a metal coupling part, a third radiation part and a feeding point... The antenna is configured to transceive a plurality of radio frequency signals in a plurality of frequency bands
Data Source
AI summary
An antenna including an antenna structure disposed on a substrate is provided. The antenna structure includes a first radiation part, a second radiation part, a metal coupling part, a third radiation part and a feeding point. The first radiation part has a first bend, a second bend and an opening end. The first radiation part extends from a grounding point of a grounding plane and the opening end thereof is nearing the grounding plane. The second radiation part extends from a section between the first bend of the first radiation part and the grounding point. The metal coupling part is nearing the first radiation part and the second radiation part. The third radiation part is disposed between the second radiation part and the grounding plane, and extends from the metal coupling part. The feeding point is coupled to where the third radiation part and the metal coupling part connected.