Multiple Antenna Apparatus for Mobile Devices
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Solution Overview
Problem
The challenge is to efficiently utilize the limited space on metallic back covers of mobile devices for multi-band antennas while maintaining performance and meeting communication requirements, particularly with the increasing demand for Wi-Fi antennas.
Innovation Solution
A multiple antenna apparatus is designed with a metallic back cover, substrate, ground plane, and feed antenna units that include radiation elements and conductors, forming resonance modes and slots to enhance antenna gain, bandwidth, and isolation, allowing for increased configurable space and improved communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are configured on metallic back cover, then communication requirements are met, but antenna configurable space is limited
Solution Approach 1:
The first radiation element is designed to support multiple resonance modes (first resonance mode, third resonance mode, and second harmonic mode) that cover different frequency bands including LTE, Wi-Fi 2.4G, and Wi-Fi 5G. This multi-functionality allows a single antenna structure to meet diverse communication requirements without requiring separate antennas for each frequency band, thereby resolving the space limitation on metallic back covers
Solution Approach 2:
The antenna design utilizes parameter changes by adjusting resonance frequencies through different feeding points and grounding configurations. The first feed antenna unit can operate at different frequencies by changing the excitation point and grounding conductor configuration, enabling the same physical structure to serve multiple communication bands
2Adaptability or versatility
If antenna space is increased, then more frequency bands are supported, but metallic back cover appearance is compromised
Solution Approach 1:
The antenna elements are integrated with the metallic back cover structure itself. The radiation part is formed as part of the back cover, eliminating the need for separate antenna components that would compromise appearance. The grounding conductor and radiation elements are merged into the existing back cover design, maintaining aesthetic integrity while supporting multiple frequency bands
Solution Approach 2:
The antenna design utilizes the thickness dimension of the metallic back cover by positioning the second radiation element between the radiation part and substrate. This three-dimensional configuration allows additional antenna functionality without increasing the planar footprint, thus preserving the back cover appearance while supporting more frequency bands
3Speed
If Wi-Fi antennas are added for high data rate, then data rate is improved, but antenna configurable space decreases
Solution Approach 1:
The first feed antenna unit is designed to provide both LTE communication and Wi-Fi functionality through its multiple resonance modes. The same antenna structure supports the 2.4G and 5G Wi-Fi bands as well as LTE bands, eliminating the need for separate dedicated Wi-Fi antennas and preserving configurable space while achieving high data rates
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 apparatus effectively increases antenna configurable space, improves antenna gain and bandwidth, and meets communication requirements by generating multiple resonance modes and harmonics, covering various frequency bands such as LTE, Wi-Fi 2.4G, and Wi-Fi 5G, while maintaining a compact form factor.
Implementation Method 1
The feed terminal of the second radiation element receives a first feed signal from the first feed point, and resonates with the first radiation element and the radiation part to generate the first resonance mode
Implementation Method 2
The third radiation element has a second feed point, and a second feed signal of the second feed point and the closed slot generate a second resonance mode
Implementation Method 3
The grounding conductor resonates with the second radiation element and the radiation part to generate the third resonance mode and the second harmonic mode
Data Source
AI summary
A multiple antenna apparatus is provided. A first feed antenna unit is shared for receiving and transmitting radio frequency (RF) signals corresponding to a bandwidth of a first resonance mode, so as to increase antenna configurable space of the multiple antenna apparatus, and thus a closed slot antenna formed by a wire, a ground plane and a radiation element is able to be configured in the multiple antenna apparatus to receive and transmit the RF signals corresponding to a second resonance mode.