Embedded Mobile Terminal Antenna Loop for Compact Multi-Band Radiation
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Solution Overview
Problem
Miniaturization of mobile communication terminal antennas results in reduced radiation efficiency, frequency band, and antenna gain, while maintaining high performance and portability is challenging due to the need for multifunctionality and compact design.
Innovation Solution
A mobile terminal design featuring two adjacent radiators with a power feed connecting portion and a ground connecting portion, where the radiators are electrically connected by an inductor, allowing for effective use of space and improved radiation characteristics by forming a conductive loop with the circuit board and display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is made smaller through miniaturization, then the mobile terminal achieves compact design and portability, but the radiation efficiency, frequency band, and antenna gain are reduced
Solution Approach 1:
The patent embeds the antenna structure within the terminal body, nesting the radiating elements inside the housing rather than using external protruding antennas. This allows the antenna to be compact while maintaining its functional characteristics through strategic placement of radiating elements and ground planes within the available internal space.
Solution Approach 2:
The patent utilizes three-dimensional space by positioning radiating elements at different heights and orientations within the terminal body. The antenna structure employs multiple layers and vertical stacking to achieve compact size while maintaining effective radiating area and frequency band characteristics.
2Ease of manufacture
If a 1/4 wavelength monopole or helical antenna is protruded to the outside, then the antenna structure is simple and easy to manufacture, but user portability is compromised and rigidity problems occur
Solution Approach 1:
The antenna is fully integrated within the terminal housing, eliminating the need for external protruding structures. The radiating elements are positioned inside the terminal body, allowing the device to have a smooth exterior that is more portable and comfortable for users while maintaining the essential monopole or helical antenna characteristics.
3Ease of operation
If embedded antenna structures are used to improve portability, then user comfort is enhanced, but antenna performance and radiation characteristics deteriorate
Solution Approach 1:
The embedded antenna utilizes vertical stacking and three-dimensional positioning of radiating elements to maintain effective radiating area within the constrained horizontal space. By employing multiple layers and varying orientations, the antenna achieves satisfactory radiation characteristics while remaining fully integrated within the terminal body.
Solution Approach 2:
The patent optimizes the electrical parameters of the embedded antenna structure, including the dimensions, spacing, and positioning of radiating elements and ground planes. By carefully adjusting these parameters, the antenna achieves resonance at the required frequencies and maintains good radiation efficiency despite the embedded configuration.
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 configuration enhances antenna performance, achieving multi-band characteristics and reducing the deterioration of radiation characteristics caused by hand effects in high-frequency bands, while also simplifying components and achieving economical efficiency through miniaturization.
Implementation Method 1
The first power feed connecting portion and the second ground connecting portion are electrically connected by an inductor
Data Source
AI summary
Disclosed herein is a mobile terminal including a terminal body comprising a circuit board formed to process radio signals, a first and a second member configured to form an external appearance of the terminal and disposed to cover a lateral surface of the circuit board, a power feed connecting portion to allow the first member and the circuit board to be power feed connected, and a ground connecting portion to allow the first member and the circuit board to be ground connected. Accordingly, an electrical element and an antenna are disposed adjacent to each other, allowing the effective use of a space within the terminal.