PCB Antenna Bared Area Grounding for Test Interference
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Solution Overview
Problem
The high cost of mechanical switch structures in common RF connectors for PCB antennas poses a challenge in reducing interference during testing while maintaining device functionality, especially in electronic devices like mobile phones and tablets where size reduction is crucial.
Innovation Solution
A PCB antenna design incorporating a high-frequency connector and a bared area on the antenna body for grounding during testing, eliminating the need for a mechanical switch structure by using a conductive object to connect the bared area to ground, thereby preventing interference and allowing normal operation without additional mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mechanical switch structure is used in the RF connector to prevent interference during testing, then the interference prevention is improved, but the cost increases
Solution Approach 1:
The patent extracts the mechanical switch structure from the RF connector, eliminating the complex switching mechanism while retaining the essential function of connecting the signal processing circuit to either the antenna or test device through a simplified connector design
Solution Approach 2:
The RF connector is designed to serve multiple functions: it can connect the signal processing circuit to the antenna for normal operation, connect to a test device for testing, or be left disconnected to prevent interference during testing, all without requiring a mechanical switch
2Reliability
If the antenna body length is extended to enhance performance, then the antenna performance is improved, but the device size increases
Solution Approach 1:
The patent extends the antenna body in a specific dimensional direction (length) to improve antenna performance while managing the overall device footprint through strategic placement and integration with the PCB structure
Data Source
AI summary
A printed circuit board (PCB) antenna includes an antenna matching network, an antenna body, and a high frequency (HF) connector. The antenna matching network is used to electrically connect to a signal processing circuit. The antenna body is connected to the antenna matching network, the antenna body includes a bared area, the bared area is used to electrically connect to a conductive object and then to be grounded when the signal processing circuit is needed to be tested. The high frequency (HF) connector is electrically connected to the antenna body and is used to connect to a test device when the signal processing circuit is needed to be tested.