Multi-resonance Antenna Parasitic Element Bandwidth
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Solution Overview
Problem
Existing antenna solutions for multi-band data processing devices face challenges in optimizing both frequency bands simultaneously due to space constraints and the need for separate supply points, leading to suboptimal performance and increased surface area requirements.
Innovation Solution
The antenna arrangement features two monopole-type radiating elements and a shared parasitic element on a dielectric piece, with mechanical sizing and positioning determining resonance locations to enhance bandwidth on both frequency bands, eliminating the need for discrete components on the circuit board and allowing for compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate antenna arrangements are used to support two frequency bands, then each frequency band can be tuned independently, but the space required increases by about 20% and both antennae must be supplied from their own supply point
Solution Approach 1:
The patent combines two separate antenna arrangements into a single integrated antenna structure that supports two frequency bands. The antenna elements are merged into one configuration where the first antenna element and second antenna element share common components and space, eliminating the need for separate antenna arrangements while maintaining independent frequency band support.
Solution Approach 2:
The antenna structure is designed to perform multiple functions simultaneously - supporting both first and second frequency bands with a single antenna arrangement. The antenna elements are configured to operate across multiple frequency ranges, allowing one antenna structure to replace what would traditionally require two separate antenna systems.
2Adaptability or versatility
If two separate antenna arrangements are used, then each frequency band has its own antenna, but it is difficult to realise the space needed for both antennae and only one antenna can be optimised
Solution Approach 1:
The patent merges two antenna arrangements into one integrated structure where the first antenna element and second antenna element are positioned within the same antenna assembly. This shared configuration reduces the overall complexity of having two separate antenna systems while maintaining the ability to independently tune each frequency band through selective activation.
Solution Approach 2:
The integrated antenna structure is segmented into distinct functional elements - the first antenna element for the first frequency band and the second antenna element for the second frequency band. This segmentation allows independent optimization of each frequency band's performance while maintaining a unified, less complex overall structure compared to two completely separate antenna systems.
3Adaptability or versatility
If one monopole antenna and parasitic radiating element are utilized, then bandwidth is increased on both frequency bands, but discrete components are required on the circuit board for adaptation
Solution Approach 1:
The antenna structure is designed to be self-adapting through its geometric configuration. The specific arrangements of the antenna elements and parasitic radiating elements create inherent impedance matching and resonance characteristics that eliminate the need for additional discrete adaptation components on the circuit board. The structure serves its own adaptation function through its physical geometry.
Solution Approach 2:
The patent achieves bandwidth expansion and impedance matching by carefully controlling geometric parameters of the antenna elements - lengths, positions, and configurations of the first antenna element, second antenna element, and parasitic radiating elements. These parameter optimizations provide inherent adaptation without requiring external discrete components.
4Adaptability or versatility
If the parasite element for the lower frequency band antenna is large, then the resonance location is determined, but the area remaining for the upper frequency band antenna element is small
Solution Approach 1:
The antenna structure employs a nested configuration where the first antenna element and second antenna element are positioned in a space-efficient arrangement. The larger parasitic radiating element for the lower frequency band is configured to coexist with the smaller second antenna element for the upper frequency band in a nested or overlapping spatial relationship, maximizing area utilization.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement to resolve the area conflict. The antenna elements are positioned in different spatial dimensions and orientations, allowing the larger lower frequency band element and smaller upper frequency band element to coexist without requiring excessive planar area. The configuration exploits vertical and lateral spacing to accommodate both elements.
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 solution achieves increased bandwidth on both frequency bands with minimal interference between them, providing at least 9 dB attenuation, and allows for a compact, visually flexible antenna design that can function with either shared or separate supply points.
Implementation Method 1
mechanical sizing and positioning determining resonance locations to enhance bandwidth on both frequency bands
Implementation Method 2
providing at least 9 dB attenuation
Data Source
Figure 1a~1b
Figure 1c~2
Figure 3
AI summary
The invention relates to an internal dual band antenna meant for small radio devices, an antenna module and a radio device, which has an antenna implemented with the antenna module. The antenna contains two radiators (7, 8) and a parasite element (14), which is shared between them. The parasite element (14) is mainly implemented on three sides of the antenna module, which sides are perpendicular to the side, where two radiators are implemented. The short-circuit conductor (12) of the parasite element (14) extends close to the supply point/points (3, 4) of the antenna in the direction of the level of the circuit board of the radio device, from which location (5) it is connected to the ground plane (11) of the radio device. The antenna structure is dimensioned so that the two resonance frequencies based on the parasite element (14) are on both functional bands at a lower frequency than the resonance frequencies of the actual radiators (7, 8). By proceeding thus, both the lower and upper frequency band is widened. The shape of the parasite element is such that the hand of a user of the radio device does not essentially weaken the adaptation of the antenna in either functional band.