Multi-feed Diversity Antenna System for Signal Robustness
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Solution Overview
Problem
Existing wireless communication systems face challenges in receiving RF signals due to attenuation, fading, and multi-path interference, which can lead to signal distortion and reduced data throughput, especially in mobile or long-distance transmissions.
Innovation Solution
A multi-feed diversity tracking antenna system is introduced, comprising a parabolic reflector and multiple feed antennas arranged to provide spatial diversity, with a combiner and controller to optimize signal reception and track the signal source, enhancing robustness and data throughput while maintaining cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single feed antenna is used to receive RF signals, then the system is simple and cost-effective, but the signal reception is susceptible to attenuation, fading, and multi-path interference
Solution Approach 1:
The single feed antenna is segmented into multiple feed antennas (first, second, third feed antennas) arranged at different positions and orientations. Each feed antenna receives the RF signal through a different path, providing spatial diversity that mitigates attenuation, fading, and multi-path interference. The segmented antenna system processes signals from multiple feeds to achieve more reliable reception.
2Reliability
If multiple feed antennas are used to provide spatial diversity, then signal reception robustness is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple feed antennas and their associated demodulators are merged into a single integrated antenna system with a common controller. The controller coordinates the operation of all feed antennas and demodulators, and combines their outputs to produce a unified data stream. This merging approach maintains signal reception robustness while reducing overall system complexity compared to completely separate systems.
3Reliability
If the receive system uses high gain to overcome attenuation, then the signal level is sufficient, but the system may receive too much signal causing the amplifier to enter non-linear region and cause distortion
Solution Approach 1:
Different feed antennas are positioned and oriented to receive signals with different local characteristics. The controller evaluates the quality of signals from each feed antenna and selectively combines or switches between them based on local signal conditions. This allows the system to maintain sufficient signal level while avoiding overload and distortion by using feeds with appropriate signal strengths for specific operating conditions.
4Reliability
If a narrow beam antenna is used to reduce interference, then signal-to-noise ratio is improved, but the beam-width is too narrow to track moving signal sources effectively
Solution Approach 1:
The antenna system transitions from a static narrow beam configuration to a dynamic multi-feed configuration. The controller dynamically switches between different feed antennas and combines their signals based on the position and movement of the signal source. This dynamic adaptation maintains high signal-to-noise ratio while effectively tracking moving sources through coordinated operation of multiple feeds with different beam orientations.
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 system effectively increases the beam-width and robustness of signal reception, allowing for high data throughput over longer distances with reduced interference, and can automatically track moving signal sources, improving the reliability and efficiency of wireless communication systems.
Implementation Method 1
a reflector configured to reflect the wireless signal towards the plurality of feed antennas
Data Source
AI summary
Embodiments disclosed herein relate to diversity receive systems and methods. An antenna system may comprise a reflector and a plurality of feed antennas configured to receive a wireless signal from a common source with directional diversity. A receive system may comprise such antenna system in combination with a plurality of receivers and/or demodulators, and in combination with a combiner and/or controller.