Dynamic Ground Point Switching for Multi-Antenna Parasitic Current Reduction
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Solution Overview
Problem
In electronic devices with multiple antennas, parasitic currents can occur due to fixed ground points, leading to decreased signal transmission and reception rates, making it difficult for the device to communicate effectively.
Innovation Solution
The electronic device includes a housing with a support member and a printed circuit board, where a plurality of switches electrically connect a first ground region to a second ground region at multiple points, allowing the wireless communication circuit to dynamically change the electrical paths used for signal transmission and reception based on frequency bands, thereby reducing parasitic currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas share fixed ground points, then the antenna structure is simple and easy to manufacture, but parasitic currents are generated causing decreased signal transmission and reception rates
Solution Approach 1:
The patent implements dynamic ground point selection by using switching elements to connect different ground regions to different antenna elements based on operating frequency bands. This transforms the static ground connection into a dynamic system that adapts to different frequency bands, preventing parasitic current generation while maintaining signal transmission quality across multiple bands
Solution Approach 2:
The patent divides the ground structure into multiple separate ground regions (first ground region and second ground region) and uses switching elements to selectively connect these regions to different antenna elements. This segmentation prevents parasitic current paths between antennas while maintaining proper grounding, resolving the contradiction between simple structure and reliable signal transmission
2Adaptability or versatility
If fixed ground points are used for multiple antennas operating in multiple frequency bands, then the ground connection is simple, but parasitic currents flow causing difficulty in effective communication
Solution Approach 1:
The switching elements dynamically reconfigure the ground connections based on the active frequency band, allowing the same antenna structure to adapt to different frequency bands without generating parasitic currents. This dynamic adaptation enables versatile multi-frequency operation while eliminating harmful parasitic effects
Solution Approach 2:
Different ground regions are assigned to different antenna elements and frequency bands, creating localized ground connections optimized for specific operating conditions. This local quality approach ensures that each antenna element has its own dedicated ground path when active, preventing parasitic current flow while maintaining adaptability across frequency bands
Data Source
AI summary
An electronic device is provided and includes a housing, a support member including a first ground region, a printed circuit board including a second ground region, a plurality of switches electrically connecting the first ground region and the second ground region, a first antenna element including at least a portion of a first edge of the housing and electrically connected with the first ground region of the support member, a second antenna element including at least a portion of a second edge of the housing and electrically connected with the second ground region of the printed circuit board, and a wireless communication circuit configured to transmit/receive in a first frequency band based on a first electrical path, transmit/receive in a second frequency band based on a second electrical path, set ON/OF states of the plurality of switches to a first arrangement and a second arrangement, wherein at least one switch of the plurality of switches is set to an ON state in each of the first arrangement and the second arrangement.