A method and apparatus for transmitting an audio signal of a multi-band multiplex wireless microphone

By combining linear power amplification and directional input mechanisms with a dedicated bandpass filter design, the problem of incompatibility between spurious signal suppression and antenna efficiency in wireless microphone transmission technology is solved, achieving clean signal transmission and flexible frequency band switching under high power output, and reducing equipment complexity and cost.

CN122372901APending Publication Date: 2026-07-10GUANGZHOU BAOLUN ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU BAOLUN ELECTRONICS CO LTD
Filing Date
2026-04-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing wireless microphone transmission technologies suffer from insufficient frequency band flexibility, difficulty in achieving both low loss and high spurious emission suppression in broadband filtering, high hardware costs and high production complexity, and are unable to balance spurious signal suppression and antenna efficiency, thus failing to meet the technical requirements of ultra-wideband high-power transmission.

Method used

The system employs linear power amplification technology to process radio frequency modulated signals. A directional import mechanism distributes wideband radio frequency signals to the target filtering path of the corresponding preset frequency band. A dedicated bandpass filter is used for narrowband constraint filtering, and a clean target frequency band signal is transmitted through a matched antenna, ensuring accurate suppression of spurious signals and improved antenna efficiency.

Benefits of technology

It achieves precise suppression of spurious signals and compatibility with antenna efficiency under high power output, improves the purity and stability of signal transmission, reduces equipment complexity and hardware cost, and adapts to the flexibility of multi-band switching and the stability of communication.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a method and apparatus for transmitting audio signals using a multi-band multiplexed wireless microphone. The method includes: converting an audio signal into a radio frequency modulated signal and performing linear power amplification to obtain a wideband radio frequency signal; then, directionally guiding the wideband radio frequency signal into a target filtering path corresponding to a preset frequency band; obtaining a clean target frequency band radio frequency signal through narrowband constraint filtering of a bandpass filter within the path; finally, converging the signal into a single path and transmitting it to a receiving end based on an antenna matching its preset frequency band. This invention proposes a method and apparatus for transmitting audio signals using a multi-band multiplexed wireless microphone. By using linear power amplification to avoid harmonic spurious signals generated during high-power output, directionally guiding the wideband signal to a path corresponding to a preset frequency band and filtering out spurious signals through narrowband constraint filtering of a bandpass filter, and combining this with an antenna to improve transmission efficiency, it can solve the problem of incompatibility between spurious signal suppression and antenna efficiency under high-power output of ultra-wideband wireless microphones.
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