Antenna Signal Amplifier Attenuation Compensation
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Solution Overview
Problem
Existing circuit arrangements for compensating antenna signal attenuation between mobile terminals and antennas, especially with electromagnetic, capacitive, or inductive coupling, face challenges in setting an optimal amplification factor without access to mobile terminal information and without complex attenuation measurement, leading to suboptimal signal quality.
Innovation Solution
A circuit arrangement with a detection unit for antenna signal power and a control unit that adapts the amplification factor at a slower rate than the network-side power regulation loop, ensuring the amplification factor is set within predefined limits to counteract variable attenuation, thereby supporting the primary power regulation without counteracting control loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predefined constant amplification factor is used in the antenna signal amplifier, then the circuit arrangement is simple to operate, but the signal quality deteriorates when attenuation varies due to electromagnetic, capacitive, or inductive coupling
Solution Approach 1:
The patent applies dynamics by transitioning from a static, predefined constant amplification factor to a dynamic amplification factor that automatically adapts to varying attenuation conditions. The control unit continuously monitors the antenna signal and adjusts the amplification factor in real-time, enabling the system to respond to changing coupling conditions between the mobile terminal and antenna, thus maintaining optimal signal quality while remaining easy to operate.
2Reliability
If the amplification factor is adapted rapidly to track attenuation changes, then signal quality improves, but the control loop conflicts with the network-side power regulation loop
Solution Approach 1:
The patent resolves the conflict between rapid adaptation and control loop complexity by implementing a dynamic amplification factor that adapts at a controlled rate. The control unit adjusts the amplification factor based on detected attenuation changes, but does so in a manner that coordinates with the network-side power regulation loop, avoiding conflicts while maintaining signal quality through balanced adaptation speed.
3Reliability
If the amplification factor is increased to compensate for high attenuation, then signal quality improves, but the system may become overdriven and lose signal integrity
Solution Approach 1:
The patent applies feedback by implementing a closed-loop control system where the control unit continuously monitors the antenna signal characteristics and adjusts the amplification factor accordingly. This feedback mechanism enables the system to detect when the signal is approaching overdrive conditions and automatically reduce the amplification factor to prevent distortion, while still providing sufficient gain to compensate for attenuation under normal conditions.
Data Source
AI summary
A circuit arrangement (1) is described for compensating an attenuation (Ko, Ka, Ka1, Ka2) occurring in an antenna signal connection (2) between a mobile terminal (3) and an antenna (4) with at least one antenna signal amplifier (5a, 5b) in the antenna signal connection (2) and with a control unit (8) for setting an amplification factor (V) by which the antenna signal routed through an allocated antenna signal amplifier (5a, 5b) is amplified or attenuated. The circuit arrangement (1) has a detection unit (7) for detecting an antenna signal power (P) of the antenna signal in the signal path of the antenna signal connection (2). The control unit (8) is configured to adapt the amplification factor (V) at a rate of change slower than the control rate of an antenna signal power control loop between a coupled mobile terminal (3) and a base station (4) of a mobile network with which the mobile terminal (3) has a communication connection, to regulate the transmit power of the mobile terminal (3) at which an antenna signal is emitted by the mobile terminal (3) if the detected antenna signal power (P) lies in a range of a predefined lower limit value (PG1) for the detected antenna signal power and a predefined upper limit value (PG2) for the detected antenna signal power (P).