Wired Headset Reference Voltage Line as Broadcast Antenna
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Solution Overview
Problem
Mobile communications devices face challenges in integrating effective internal broadcast radio antennas due to size constraints, leading to degraded voice quality when using wired headsets as antennas, which can introduce noise and require additional filtering components.
Innovation Solution
A mobile wireless communications device design that utilizes a wired headset with a reference voltage line as an antenna for the wireless broadcast receiver, coupled through a circuitry that determines and selectively connects the appropriate contacts, enhancing antenna performance and reducing noise impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an internal broadcast radio antenna is used in the mobile device, then the aesthetic appeal and compact design are maintained, but the antenna effectiveness and reception quality are degraded due to size constraints
Solution Approach 1:
The wired headset connector is designed to serve multiple functions: audio signal transmission and broadcast radio antenna. By making the connector multi-functional, the patent eliminates the need for separate internal antenna structures while maintaining effective broadcast reception capability
Solution Approach 2:
The wired headset connector acts as an intermediary element that bridges the audio function and the broadcast radio function. Instead of requiring a dedicated internal antenna, the connector serves as the radiating element for broadcast signals while maintaining its audio transmission role
2Device complexity
If the wireless broadcast receiver is specifically coupled to the audio signal line of the wired headset, then the device complexity is reduced, but the voice quality is degraded due to noise and echo
Solution Approach 1:
The patent extracts the broadcast radio reception function from the audio signal path by coupling the wireless broadcast receiver to the reference voltage line instead of the audio signal line. This separation removes the source of noise and echo that would otherwise contaminate the audio signals
Solution Approach 2:
The patent segments the electrical connections in the wired headset connector into distinct functional paths: audio signal lines for audio transmission and the reference voltage line for broadcast radio reception. This segmentation allows independent optimization of each function without mutual interference
Data Source
AI summary
A mobile wireless communications device may include a housing, and circuitry carried by the housing. The circuitry may include a wireless transceiver, a wireless broadcast receiver, audio circuitry coupled to the wireless transceiver and the wireless broadcast receiver, a wired headset jack, and a reference voltage device line, and at least one wired headset device line coupled between the audio circuitry and the wired headset jack. The reference voltage device line may be also coupled to the wireless broadcast receiver so that a corresponding reference voltage headset line of a wired headset serves as an antenna for the wireless broadcast receiver. The reference voltage line may be switchable to one or more connectors at the headset jack.