Radio Communication Module EIRP Feedback for Power Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio communication modules face inaccuracies in adjusting transmission power due to deviations between detected power in feedback circuits and actual transmission power, leading to potential exceedance of regulated values.
Innovation Solution
A method involving temperature adjustment, transmission of a predetermined frequency signal, feedback control based on power detection, and measurement of equivalent isotropic radiated power to accurately adjust transmission signal output, with threshold values adjusted accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Automatic Level Control (ALC) is used to adjust transmission power, then transmission power can be stabilized, but deviation between detected power and actual transmission power occurs leading to inaccurate output adjustment
Solution Approach 1:
A second antenna is introduced as an intermediary measurement device to receive the transmitted radio signal and measure the equivalent isotropic radiated power (EIRP). This separate measurement path eliminates the deviation between detected power and actual transmission power that occurs in traditional feedback circuits, enabling accurate output adjustment while maintaining transmission power stability.
2Ease of operation
If feedback control based on internal power detection is used, then output control can be implemented, but transmission power may exceed regulated values due to detection deviations
Solution Approach 1:
The system implements feedback control using the equivalent isotropic radiated power (EIRP) measured by the second antenna. The measured EIRP value is fed back to adjust the transmission output, ensuring that the actual radiated power remains within regulated limits. This external measurement-based feedback eliminates the accuracy issues of internal detection while maintaining ease of operation.
3Device complexity
If a single threshold value is used for output control, then control process is simplified, but accurate adjustment across varying conditions cannot be achieved
Solution Approach 1:
The threshold value is made dynamic and adjustable based on the measured equivalent isotropic radiated power (EIRP). Instead of using a fixed threshold, the system adjusts the threshold according to the actual transmission conditions and measured power levels, enabling accurate output adjustment across varying conditions while keeping the control process relatively simple through automated adaptation.
Data Source
AI summary
An output control method for adjusting an output of a radio communication module includes a temperature adjustment step, a transmission step, a feedback control step, a measurement step, and an output control step. The temperature adjustment step sets a temperature of the radio communication module to a predetermined set temperature by a temperature adjusting mechanism. The transmission step has a first antenna transmit a radio signal by sending a transmission signal of a predetermined frequency to the radio communication module. The feedback control step controls an output of the transmission signal based on a comparative result between a power value obtained by detecting the transmission signal and a predetermined threshold value of power. The measurement step receives the radio signal by a second antenna, and measures an equivalent isotropic radiated power of the radio signal. The output control step adjusts an output of the transmission signal based on the equivalent isotropic radiated power measured in the measurement step.