Terminal Antenna Shared Ground Layout for Adjacent Antenna Interference
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Solution Overview
Problem
The increasing number of antennas in electronic devices, particularly in limited spaces, leads to mutual interference, degrading antenna performance and limiting bandwidth, especially in frequency bands like N41 and N78.
Innovation Solution
A terminal antenna system with a shared ground point design and distributed capacitor structure is implemented, allowing for a co-body antenna configuration where adjacent antennas share a ground point and utilize distributed capacitors to excite new modes, increasing bandwidth and reducing hardware costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If antennas are disposed adjacently in limited space, then space utilization is improved, but mutual interference between antennas increases and antenna performance degrades
Solution Approach 1:
The patent merges the ground points of two adjacent antennas (GPS antenna and IFA antenna) into a single shared ground point. This combining approach reduces the number of separate ground connections needed, minimizes mutual interference between the antennas, and improves overall antenna performance while maintaining compact spatial arrangement.
Solution Approach 2:
The shared ground point serves multiple functions: it provides the ground reference for both the GPS antenna and the IFA antenna simultaneously. This multi-functional design eliminates the need for separate ground points, reduces hardware complexity, and resolves the mutual interference issue while supporting both antenna systems.
2Device complexity
If a single-frequency antenna is used, then hardware cost is reduced, but bandwidth coverage is limited
Solution Approach 1:
The patent introduces a distributed capacitor structure into the single-frequency antenna design. By adjusting the capacitance parameters of the distributed capacitor, the antenna can excite multiple modes (CM mode and DM mode) and achieve extended bandwidth coverage across N41 and N78 frequency bands, transforming a single-frequency antenna into a multi-band antenna without increasing hardware complexity.
3Ease of manufacture
If traditional antenna design is used, then manufacturing is simple, but radiation performance is insufficient
Solution Approach 1:
The distributed capacitor acts as an intermediary element that couples the GPS antenna and IFA antenna systems. This intermediary structure enables mode conversion between CM and DM modes, enhances radiation performance, and achieves better antenna efficiency while maintaining compatibility with existing manufacturing processes.
Data Source
AI summary
Embodiments of this application relate to the field of antenna technologies, and disclose a terminal antenna system and an electronic device, to effectively reduce mutual impact between adjacent antennas. A specific solution is as follows: The terminal antenna system includes: a first radiator and a second radiator, where a first end of the first radiator is coupled to a first end of the second radiator through a gap. A first feed point is provided at a second end, away from the second radiator, of the first radiator, and a first ground point is further provided on the first radiator. A second feed point is provided at a second end of the second radiator, and the second end of the second radiator is an end away from the first radiator.