Coupling Simulator for Antenna Oscillation Control
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Solution Overview
Problem
The close proximity of antennas in signal boosters can cause coupling, leading to amplifier oscillation, which negatively impacts the performance of the signal booster.
Innovation Solution
An apparatus comprising passive circuitry with a coupling simulator and combining device, which generates a coupling simulator output with pre-determined phase and attenuation effects to negate the effects of coupling between antennas, thereby preventing amplifier oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If antennas are placed in close proximity within the boosting device, then the device complexity is reduced and integration is improved, but coupling occurs between antennas causing amplifier oscillation and performance degradation
Solution Approach 1:
A coupling simulator is introduced as an intermediary component between the antennas and the amplifier. This simulator models the coupling effects that would otherwise occur between closely spaced antennas, allowing the antennas to be placed in close proximity without causing amplifier oscillation. The coupling simulator acts as a mediator that reproduces the intended coupling behavior in a controlled manner, preventing harmful interactions while maintaining system integration.
2Ease of operation
If exterior antennas are eliminated in favor of integrated antennas, then the ease of operation is improved and installation is simplified, but coupling-induced oscillation occurs affecting signal booster performance
Solution Approach 1:
The harmful coupling effect that arises from integrating antennas within the boosting device is converted into a beneficial simulation. Instead of trying to eliminate coupling entirely, the coupling simulator deliberately recreates the coupling effect in a controlled manner, using it to cancel out the harmful oscillations. This transforms the problematic coupling into a useful mechanism for preventing amplifier instability.
3Quantity of substance
If signal booster integration is enhanced to include both transmit and receive antennas internally, then the quantity of components is reduced, but the proximity of antennas causes coupling that adversely affects amplifier function
Solution Approach 1:
The coupling simulator serves as an intermediary that models and controls the interaction between the integrated transmit and receive antennas. By placing the simulator between the antennas and the amplifier, it prevents the harmful coupling effects from directly affecting the amplifier while allowing the antennas to remain in close proximity within the compact device structure.
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
The solution effectively reduces or eliminates coupling-induced oscillation, enhancing the stability and performance of signal boosters by using passive elements that model specific system parameters to cancel coupled inputs.
Implementation Method 1
the coupling simulator generating a coupling simulator output having properties varying from output properties of the amplifier output by a pre-determined phase effect
Implementation Method 2
a pre-determined attenuation effect
Implementation Method 3
the combining device generating an amplifier input comprising the coupling simulator output... the properties of the coupling simulator output are caused by an attenuating device for sampling the amplifier output and a phase shifting device coupled to the attenuating device
Data Source
AI summary
Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system.