Internal Antenna Mounting on PCB Side and Top Surfaces
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Solution Overview
Problem
Mobile terminals face challenges in securing sufficient space for multiple internal antennas, leading to reduced antenna performance due to user hand interference and the need for larger devices or module elimination, especially with the increasing demand for multi-band and multi-function operations.
Innovation Solution
The design incorporates a monopole and PIFA antenna configuration on a printed circuit board, with high-frequency band antennas mounted on side surfaces and low-frequency band antennas on the upper surface, utilizing a fusion-bonding and in-mold structure to minimize hand interference and optimize space, while stabilizing the antennas with a boss hole and soldering for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate internal antennas are mounted for multi-band and multi-function operations, then communication functionality is improved, but antenna allocation space is reduced and device thickness increases
Solution Approach 1:
The patent implements a universal antenna structure that can operate across multiple frequency bands (3G, 4G LTE, and multimedia bands) using a single integrated radiator design. This multi-functional antenna eliminates the need for separate antennas for different communication protocols, thereby securing antenna allocation space while maintaining comprehensive communication functionality.
Solution Approach 2:
The patent utilizes three-dimensional space by mounting antennas on side surfaces of the printed circuit board in addition to the upper surface. This spatial arrangement optimizes antenna allocation by exploiting vertical and lateral dimensions, reducing the overall device thickness while accommodating multiple antenna functions.
2Shape
If internal antennas are used for aesthetic design, then appearance is improved, but antenna radiation performance deteriorates due to user hand interference
Solution Approach 1:
The patent divides the antenna system into multiple radiators positioned at different locations and orientations on the printed circuit board. By segmenting the antenna functions across multiple elements rather than relying on a single large antenna, the design maintains aesthetic appearance while improving radiation performance through diversity and reduced hand interference impact.
Solution Approach 2:
The patent positions different antenna radiators with different orientations and locations to optimize their performance in specific areas. Side surface-mounted antennas are positioned to minimize hand coverage during typical usage, while upper surface antennas handle other frequency bands, creating local optimization for each antenna element's radiation characteristics.
3Volume of moving object
If internal antenna structure is fixed for compact design, then device size is reduced, but antenna performance cannot be optimized for user grip patterns
Solution Approach 1:
The patent employs preliminary action by strategically positioning antenna radiators on side surfaces and upper surfaces during the design phase, anticipating typical user grip patterns. This pre-optimization ensures that antennas are naturally positioned in areas less likely to be covered by hands during normal usage, eliminating the need for complex adjustable mechanisms while maintaining compact device size.
Data Source
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AI summary
An antenna of a mobile includes at least two internal antennas and a printed circuit board disposed between a front cover and a rear cover. The printed circuit board includes at least one first antenna mounted on an upper surface and the printed circuit board having at least one fastening opening therein. A second antenna is mounted in an upper portion of a side surface of the printed circuit board and included a protruded portion of one end protruded from a body and in which the protruded portion is fastened to the fastening opening to be fastened to a side surface of the printed circuit board and the mobile terminal can be produced having a reduced thickness.