Wired Headset Reference Voltage Line as Broadcast Antenna
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Solution Overview
Problem
Existing mobile communication 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 interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wired headset is specifically coupled to the audio signal line for broadcast radio reception, then the headset can serve as an external antenna, but voice quality degrades due to noise and echo requiring additional filtering components
Solution Approach 1:
The patent introduces a coupling circuit as an intermediary component between the headset and the broadcast receiver. This circuit includes switching elements and filtering components that mediate the connection, allowing the headset to function as an antenna while filtering out noise and echo before the signal reaches the audio processing path. The intermediary circuit thus resolves the contradiction by enabling headset compatibility while preventing voice quality degradation.
Solution Approach 2:
The patent segments the audio signal path into distinct functional sections: the headset connection interface, the coupling circuit with switching elements, the filtering stage, and the broadcast receiver. By segmenting the system, the patent can apply specific processing (filtering, switching) only where needed to maintain voice quality while preserving headset functionality as an antenna.
2Reliability
If an external broadcast radio antenna is used, then reception performance improves, but the aesthetic appeal of the cell phone device is reduced
Solution Approach 1:
The patent makes the wired headset multi-functional by enabling it to serve both as an audio output device and as an external broadcast radio antenna. The coupling circuit detects headset connection and automatically configures the headset lines to function as antenna elements. This universality resolves the contradiction by providing improved reception performance through an external antenna configuration that does not permanently alter the device's appearance.
Solution Approach 2:
The patent implements dynamic reconfiguration of the headset connection based on operational mode. When a headset is detected, the system dynamically switches the headset lines from audio-only function to antenna function for broadcast reception. This dynamic adaptability allows the device to optimize reception performance only when needed, maintaining aesthetic appeal in normal operation modes.
3Reliability
If the contact rings on the headset connector are specifically coupled for broadcast radio, then antenna performance improves, but additional filtering components are required to maintain voice quality
Solution Approach 1:
The patent merges multiple functions into the coupling circuit: antenna switching, signal filtering, and mode detection are all combined in a single integrated circuit block. The filtering components are integrated into the coupling circuit rather than being separate add-on elements. This merging reduces overall device complexity while maintaining improved antenna performance and voice quality.
Solution Approach 2:
The coupling circuit acts as an intermediary that provides built-in filtering capabilities. Rather than requiring separate filtering components in the main signal path, the intermediary coupling circuit incorporates filtering functions that are automatically applied when the headset is used as an antenna, thus improving reception without adding complexity to the overall system architecture.
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
Enables the use of any standard wired headset to provide optimal performance for wireless broadcast reception without degrading voice quality, eliminating the need for additional filters and improving signal-to-noise ratio through selective coupling and resonant circuit adjustments.
Implementation Method 1
a reference voltage headset line of a wired headset serves as an antenna for the wireless broadcast receiver
Data Source
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AI summary
A mobile wireless communications device (10) may include a housing (13), and circuitry carried by the housing. The circuitry may include a wireless transceiver (11), a wireless broadcast receiver (12), audio circuitry (14) coupled to the wireless transceiver and the wireless broadcast receiver, a wired headset jack (15), and a reference voltage device line (17a), 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 (26a) of a wired headset (16) 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.