Circularly Polarized Underwater Antennas for Stable Wave-Driven Links
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Solution Overview
Problem
Communication devices installed underwater, such as in the sea, experience instability due to wave influences, leading to unstable antenna orientation and potential failure in transmission and reception.
Innovation Solution
The use of circularly polarized antennas in communication devices and systems, along with signal processing units, to maintain stable communication by processing signals and adapting to changing antenna orientations, ensuring reliable communication regardless of device posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linearly polarized antenna is used in underwater communication, then the antenna structure is simple, but the communication stability deteriorates when the device posture changes due to wave influence
Solution Approach 1:
The patent changes the polarization parameter of the antenna from linear to circular. This parameter change allows the antenna to maintain consistent radiation characteristics regardless of device orientation, resolving the contradiction between structural simplicity and communication stability in underwater environments where wave action causes posture changes.
Solution Approach 2:
The circularly polarized antenna provides universal communication capability in all orientations. Unlike linearly polarized antennas that require specific alignment, the circularly polarized antenna can maintain stable communication regardless of the device's posture, making it universally applicable in unstable underwater conditions.
2Reliability
If the antenna orientation is fixed to maintain stable communication, then the communication reliability is improved, but the adaptability to changing wave conditions deteriorates
Solution Approach 1:
By changing from linear to circular polarization, the antenna's radiation pattern becomes independent of orientation angle. This parameter change provides inherent adaptability to wave-induced posture changes while maintaining communication stability, eliminating the need for active orientation control.
3Reliability
If active orientation control is implemented to maintain antenna alignment, then communication stability is improved, but the device complexity and energy consumption increase
Solution Approach 1:
The patent resolves the need for active orientation control by changing the antenna's polarization parameter to circular. This passive solution maintains communication stability without requiring sensors, actuators, or control algorithms, thereby avoiding increased device complexity and energy consumption.
Solution Approach 2:
The circularly polarized antenna provides self-adjusting communication capability. It automatically maintains stable communication regardless of device posture changes caused by waves, eliminating the need for external orientation control systems and reducing overall system complexity.
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 enables stable communication in unstable underwater conditions by utilizing circularly polarized antennas that can receive and transmit signals effectively in any direction, improving communication reliability and range.
Implementation Method 1
the first antenna is a circularly polarized antenna
Data Source
AI summary
The present technology relates to a communication device and a communication system that enable favorable communication in a liquid.A communication device includes a first antenna connected to a communication network in a liquid, and a first signal processing unit that processes at least one of a signal received by the first antenna or a signal transmitted by the first antenna, in which the first antenna is a circularly polarized antenna. A second antenna connected to a communication network in gas, and a second signal processing unit that processes at least one of a signal received by the second antenna or a signal transmitted by the second antenna are further included. The present technology can be applied to, for example, a communication device installed in sea water.