Antenna Structure With Segmented Radiating Portions For Wideband Coverage
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Solution Overview
Problem
The challenge is to design an antenna with a wider bandwidth in limited space for mobile terminal products, as the demand for antenna bandwidth increases with the evolution of wireless communication technology, while maintaining efficient performance across various frequency bands.
Innovation Solution
The antenna structure incorporates a housing with a frame portion, middle frame, and back plate, featuring gaps and slots that adjust the radiation frequency bands by varying the length of side slots and gaps, along with a switching and matching circuit to optimize frequency coverage, allowing for flexible operation across GSM, LTE-A, Bluetooth, WIFI, and UMTS modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna space is reduced to accommodate mobile terminal products, then the device size is reduced, but the antenna bandwidth becomes insufficient
Solution Approach 1:
The antenna is divided into multiple radiating portions (first, second, and third radiating portions) separated by gaps. Each radiating portion can be independently optimized for different frequency bands, allowing the antenna to cover multiple bands (GSM, LTE-A, UMTS) within a compact space. The segmentation enables each portion to contribute to different frequency ranges, effectively increasing the overall bandwidth without requiring more space.
Solution Approach 2:
The patent utilizes the three-dimensional space within the housing by positioning radiating portions on different planes and orientations. The first radiating portion is on the end portion, the second on the side portion, and the third on another side portion, creating a multi-dimensional antenna structure that maximizes space utilization while achieving wide bandwidth coverage.
2Device complexity
If the antenna structure is simplified to reduce device complexity, then manufacturing is easier, but frequency band coverage becomes limited
Solution Approach 1:
The antenna structure is designed to perform multiple functions simultaneously. The same antenna housing and radiating portions serve multiple wireless communication standards (GSM 900/1800, LTE-A 700/800/900/1800, UMTS 2100). By carefully designing the geometry, gaps, and slots of the radiating portions, a single antenna structure achieves broad frequency band coverage without requiring separate antennas for each standard.
Solution Approach 2:
The patent employs parameter optimization in the geometry of radiating portions, including the lengths, widths, and positions of gaps and slots. By adjusting these parameters, the antenna can be tuned to resonate at multiple frequency bands. The specific dimensional parameters of the radiating portions are optimized to achieve impedance matching and resonance across GSM, LTE-A, and UMTS frequency ranges.
3Adaptability or versatility
If gaps and slots are added to adjust radiation frequency bands, then frequency coverage is improved, but the antenna structure becomes more complex
Solution Approach 1:
The gaps and slots are integrated into the housing structure itself rather than being added as separate components. The first and second gaps are formed in the end portion and side portion of the housing, respectively, while slots are incorporated into the radiating portions. This merging approach allows frequency band adjustment while maintaining a relatively simple overall structure that can be manufactured as a single piece or assembly.
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 design effectively adjusts frequency bands to accommodate multiple wireless communication standards, enhancing bandwidth utilization in constrained spaces with improved return loss and reflection coefficients, meeting the requirements for efficient signal transmission and reception.
Implementation Method 1
a first radiating portion F1, a second radiating portion F2, and a third radiating portion F3... used to transmit and receive signals in different frequency bands
Data Source
AI summary
An antenna structure includes a frame portion and a feeding portion. The frame portion is provided with a first gap and a second gap. The first gap and the second gap penetrate and divide the frame portion into a first radiating portion, a second radiating portion, and a third radiating portion. The feeding portion is arranged on the first radiating portion adjacent to the second gap. One end of the feeding portion is electrically coupled to the first radiating portion, and the other end of the feeding portion is electrically coupled to a feeding point to feed current to the first radiating portion. The second radiating portion and/or the third radiating portion is provided with a side slot. A radiation frequency band of the second radiating portion and/or the third radiating portion where the side slot is located is adjusted by adjusting the length of the side slot.