Antenna Radiation Unit Parasitic Coupling Multi-Band Coverage
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Solution Overview
Problem
Current mobile terminal antennas are limited to low frequency bands and lack the capability to cover a wide range of frequency bands due to their single radiation unit design, which restricts their multi-band and multi-polarization functionality.
Innovation Solution
The antenna design incorporates a radiation unit with at least one parasitic unit, where the radiation unit includes a first and second radiation sub-unit, and the parasitic unit is coupled with the radiation unit via a feed point, allowing for a wider frequency range coverage from 700 MHz to 2700 MHz by adjusting the energy distribution using a matching circuit with tuners and switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single radiation unit is used in the antenna, then the device complexity is reduced, but the frequency band coverage is limited to low frequency bands only
Solution Approach 1:
The radiation unit is divided into multiple sub-units (first radiation sub-unit and second radiation sub-unit), each capable of operating at different frequency bands. This segmentation allows the antenna to cover both low and high frequency bands while maintaining a relatively simple overall structure.
Solution Approach 2:
The antenna structure is designed to perform multiple functions by integrating both low frequency and high frequency radiation capabilities into a single antenna system. The first and second radiation sub-units work together to provide universal frequency band coverage across multiple bands.
2Adaptability or versatility
If the distance from feed point to ground point is increased, then high frequency band performance is improved, but energy loss increases due to user interference
Solution Approach 1:
The patent introduces a spatial dimension constraint by limiting the distance from feed point to ground point to be less than a preset value. This dimensional constraint helps reduce energy loss while maintaining high frequency band coverage capability through proper geometric arrangement.
3Adaptability or versatility
If parasitic units are added to the antenna, then multi-polarization capability is enhanced, but the device complexity increases
Solution Approach 1:
The parasitic units are integrated with the radiation sub-units in a merged structure where the parasitic units are positioned adjacent to the radiation sub-units. This merging approach enables multi-polarization capability while avoiding excessive structural complexity by combining multiple functions into a unified antenna design.
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 enhances the antenna's ability to generate RF signals across a broader frequency range, improving multi-band and multi-polarization capabilities while minimizing energy loss through user interference.
Implementation Method 1
The at least one parasitic unit is coupleable with the radiation unit via the feed point
Data Source
AI summary
An antenna and a mobile terminal are provided. The antenna may include a radiation unit and at least one parasitic unit. The radiation unit includes a first radiation sub-unit and a second radiation sub-unit. A first terminal of the first radiation sub-unit is connected to a bottom edge of a rear cover of the mobile terminal. A second terminal of the first radiation sub-unit is provided with a feed point, a first terminal of the second radiation sub-unit is connected to the bottom edge. A second terminal of the second radiation sub-unit is provided with a ground point. A distance from the feed point to the ground point is greater than zero and less than a preset value. The at least one parasitic unit is coupleable with the radiation unit via the feed point.