Multi-mode Signal Conditioner for Active Antenna Control
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Solution Overview
Problem
Existing wireless communication devices face challenges in reducing the size of antennas and components while maintaining functionality, particularly in implementing multi-mode active antennas with multiple active components, which often require multiple wires or cables, increasing device volume.
Innovation Solution
A system that supplies voltage and control signals to active components using a simple two-lead cable, employing a pulse width modulated (PWM) signal translated into supply voltage and control signals, and a multi-mode signal conditioner that combines RF and PWM signals for transmission over a single or multiple lines, with tuning decoders separating and distributing these signals to active components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wires or cables are used to supply control signals and power to active components in multi-mode active antennas, then the active components can be controlled to provide dynamic features, but the device volume increases
Solution Approach 1:
The patent combines multiple control signals and power supply into a single composite signal that is transmitted over one cable. The signal conditioner at the receiving end separates and processes these combined signals to control multiple active components, thereby reducing the number of cables required while maintaining full functionality for beam switching, impedance matching, and frequency tuning
Solution Approach 2:
The single cable system is designed to carry multiple functions simultaneously - power supply, multiple control signals for different active components, and communication. This multi-functional approach eliminates the need for separate cables for each function, reducing overall device volume while maintaining adaptability
2Volume of moving object
If passive antenna structures are used, then the physical volume is sufficient for resonant structures, but the device size cannot be reduced and dynamic features are limited
Solution Approach 1:
The patent transitions from static passive antenna structures to dynamic active antenna systems. Active components such as varactors and switches are integrated into the antenna structure, allowing real-time adjustment of electrical characteristics including resonance frequency, beam direction, and impedance. This enables small antennas to achieve dynamic reconfiguration without sacrificing performance
Solution Approach 2:
The patent employs active components whose electrical parameters can be dynamically changed through electrical control signals. Varactor diodes change capacitance based on control voltage, switches change inductance and resistance states, enabling the antenna to adjust its resonant frequency, radiation pattern, and impedance to match different operational requirements in compact form factors
3Adaptability or versatility
If multiple active components are integrated into antennas for tuning and control, then antenna capability is improved, but the number of required cables and wiring increases
Solution Approach 1:
The patent introduces a signal conditioner as an intermediary device that receives a single composite signal containing multiple control commands, separates these signals, and distributes them to multiple active components. This intermediary approach simplifies the wiring architecture by consolidating multiple control paths into one input cable while maintaining the ability to control multiple components independently
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
This solution reduces the number of transmission lines required, enabling compact, efficient control and activation of active antenna systems with dynamic features like beam switching and impedance matching, thereby minimizing device size and improving performance.
Implementation Method 1
A pulse width modulated (PWM) signal is sent to an assembly of active components over a simple coaxial cable. A circuit is implemented that translates the PWM signal into a supply voltage as well as a set of control signals to control the active components.
Implementation Method 2
a multi-mode signal conditioner combines a plurality of RF and PWM signals and transmits them over a single transmission line
Implementation Method 3
A tuning decoder separates RF signals from low frequency control signals and distributes the signals to one or multiple active components.
Data Source
AI summary
An active circuit control system that utilizes multiple PWM signals to activate and power an array of active components, requiring minimal wiring between the multi-mode signal conditioner and active components. Signal conditioning and filtering is implemented to allow transmission of power and control signals for multiple components over a single or multiple transmission lines. The circuit can be used to provide supply voltage and control signals for active antennas, switch networks, and other components in communication systems and electronic devices.