Antenna Structure for Wireless Device with Metallic Backboard
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Solution Overview
Problem
Metallic housings in wireless communication devices often shield antenna signals, degrading device performance and affecting the integrity and aesthetics of the device due to slots or gaps in the metal backboards.
Innovation Solution
An antenna structure with a metallic member, feed portion, ground portion, and radiating portions, integrated with matching circuits, where the metallic member is designed without slots or gaps on the backboard to minimize shielding, and the radiating sections are optimized for different frequency bands using adjustable components like inductors and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal housing is used for the wireless communication device, then the structural strength and aesthetics are improved, but the antenna signals are shielded by the metal housing
Solution Approach 1:
The metal backboard is segmented by introducing slots that break the continuous metal surface into multiple regions. This segmentation allows electromagnetic waves to pass through the slots while maintaining the overall structural integrity of the metal housing, thus reducing signal shielding while preserving strength.
Solution Approach 2:
The patent introduces an antenna structure with specific radiating portions and ground portions that interact with the metal backboard through controlled slots. The antenna structure acts as an intermediary element that enables signal transmission through the metal housing by creating localized electromagnetic fields that can penetrate or diffract through the slots.
2Object-affected harmful factors
If slots or gaps are introduced in the metal backboard to allow antenna signals, then signal shielding is reduced, but the integrity and aesthetics of the metal backboard are affected
Solution Approach 1:
The slots are strategically positioned in specific local regions of the metal backboard where they are less visually prominent or where structural requirements are more flexible. The antenna structure is also locally optimized with specific radiating and ground portions positioned to maximize signal transmission through the slots while minimizing visual impact on the overall backboard appearance.
3Adaptability or versatility
If the antenna structure is optimized for multiple frequency bands, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The antenna structure is designed with radiating portions and ground portions that can operate across multiple frequency bands simultaneously. The slot configuration in the metal backboard is optimized to support broadband signal transmission, allowing the same antenna structure to serve multiple communication standards (LTE, WiFi, GPS, etc.) without requiring separate antenna systems for each frequency band.
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 operates across multiple frequency bands (e.g., LTE-A, GPS, WiFi) with improved radiating efficiency and maintains the integrity and aesthetics of the device by eliminating slots and gaps on the backboard.
Implementation Method 1
the antenna structure effectively operates across multiple frequency bands (e.g., LTE-A, GPS, WiFi) with improved radiating efficiency
Data Source
AI summary
An antenna structure includes a metallic member, a feed portion, a ground portion and a radiating portion. The metallic member includes a front frame, a backboard, and a side frame. The side frame defines a slot. The front frame defines a first gap and a second gap, which are in communication with the slot and extend across the front frame. A straight portion of the front frame between the first gap and the second gap forms a radiating section. The feed portion and the ground portion are electrically connected to the radiating section. Current enters the radiating section from the feed portion. The current flows through the radiating section and towards the second gap. The radiating portion obtains current from the radiating section by coupling. The radiating section and the radiating portion generate radiation signals in two different frequency bands. A wireless communication device using the antenna structure is provided.