Circularly Polarized Antenna Phase Detection Without Noisy Switching
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Solution Overview
Problem
Existing polarization plane detection devices using dual right-hand/left-hand circularly polarized antennas are limited in communication applications due to the need to alternate and switch signals at high frequencies, leading to complex switching circuits and potential noise production.
Innovation Solution
An antenna device comprising an antenna, first and second coupling circuits, and a control processing circuit that separates and processes right-hand and left-hand circularly polarized wave signals to detect phase differences, allowing for efficient polarization plane detection and alignment without requiring simultaneous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the dual right-hand/left-hand circularly polarized antenna is used for polarization plane detection by alternately switching signals, then the polarization plane can be detected, but the switching circuit becomes complicated and noise is produced
Solution Approach 1:
The patent divides the detection process into two separate time slots: one for receiving right-hand circularly polarized waves and another for left-hand circularly polarized waves. By segmenting the signal reception in time rather than using complex simultaneous switching, the circuit complexity is reduced while maintaining detection accuracy through sequential measurement of both polarizations
Solution Approach 2:
The patent employs periodic alternation between receiving right-hand and left-hand circularly polarized waves. This periodic action allows the system to systematically switch between polarization modes in a controlled manner, enabling accurate polarization plane detection through temporal separation rather than complex spatial switching circuits
2Measurement precision
If the dual right-hand/left-hand circularly polarized antenna is used for polarization plane detection by alternately switching signals, then the polarization plane can be detected, but noise is produced
Solution Approach 1:
By segmenting the reception process into separate time intervals for right-hand and left-hand circularly polarized waves, the patent eliminates the need for rapid switching operations that generate noise. The sequential measurement approach reduces electromagnetic interference and switching noise while preserving the ability to accurately determine the polarization plane from both signal components
3Measurement precision
If all separated right-hand and left-hand circularly polarized wave signals are used for polarization plane detection, then accurate detection is achieved, but communication cannot be performed simultaneously
Solution Approach 1:
The patent implements a dynamic time-division multiplexing scheme where the antenna alternates between detection mode and communication mode. During detection, both right-hand and left-hand circularly polarized signals are received and processed to determine the polarization plane. During communication, the antenna switches to normal operational mode. This dynamic temporal separation enables both accurate polarization detection and communication functionality without mutual interference
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
Enables efficient detection and alignment of polarization planes, maximizing signal output and achieving favorable cross-polarization discrimination while simplifying circuitry and reducing noise.
Implementation Method 1
an antenna which receives a radio wave signal and separates the radio wave signal into a right-hand circularly polarized wave signal and a left-hand circularly polarized wave signal
Data Source
AI summary
According to one embodiment, an antenna device includes an antenna, a first circuit, a second circuit and a control processing circuit. The antenna receives a radio wave signal and separates the radio wave signal into a right-hand circularly polarized wave signal and a left-hand circularly polarized wave signal. The first circuit divides the right-hand circularly polarized wave signal into a first right-hand circularly polarized wave signal and a second right-hand circularly polarized wave signal. The second circuit divides the left-hand circularly polarized wave signal into a first left-hand circularly polarized wave signal and a second left-hand circularly polarized wave signal. The control processing circuit detects a phase difference between the first right-hand circularly polarized wave signal and the first left-hand circularly polarized wave signal.