Multi-Dimensional Antenna for Dual Circular Polarization Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing satellite radio systems face challenges in efficiently receiving circularly polarized signals due to the need for separate antennas and complex switching devices to distinguish between signals with close frequency bands and opposite polarization directions, which is economically disadvantageous for vehicle reception.
Innovation Solution
A multi-dimensional antenna structure with symmetrically disposed antenna conductor sections that can receive both left-rotating and right-rotating circularly polarized waves, maintaining similar radiation characteristics and allowing for efficient configuration, utilizing a common phase reference point to ensure consistent current phases across pairs of conductor sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antennas with separate lines to the receiver are used for receiving signals with opposite circular polarization directions, then reception efficiency for both polarizations is improved, but device complexity and economic cost increase due to complicated switching devices
Solution Approach 1:
The patent combines the functions of receiving both left-hand circularly polarized (LHCP) and right-hand circularly polarized (RHCP) signals into a single antenna structure. The antenna comprises a first conductor for receiving LHCP signals and a second conductor for receiving RHCP signals, integrated within one antenna body, thereby eliminating the need for separate antennas and switching devices while maintaining reception efficiency for both polarizations
Solution Approach 2:
The single antenna structure is designed to perform multiple functions: it can receive both LHCP and RHCP satellite signals simultaneously through its dual conductor configuration, making it a universal receiver for different polarization types without requiring separate specialized antennas for each polarization direction
2Device complexity
If frequency-selective measures are used within one antenna to separate two frequency bands, then device complexity is reduced, but manufacturing precision requirements increase due to great selection requirement
Solution Approach 1:
The patent applies local quality by assigning different spatial orientations and configurations to the first and second conductors within the antenna structure. The conductors are positioned and oriented differently to selectively receive signals with opposite circular polarization directions, allowing frequency band separation through structural differentiation rather than requiring high-precision frequency-selective components
Solution Approach 2:
Instead of separating frequency bands through frequency-selective measures in the frequency domain, the patent uses spatial dimensionality by orienting the conductors in different directions and configurations. This dimensional approach to signal separation reduces the precision requirements compared to frequency-selective methods while maintaining the ability to distinguish between different signal types
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 antenna achieves efficient reception of both polarized signals with simplified configuration, maintaining consistent radiation characteristics and polarization, thus overcoming the economic and complexity issues of existing systems.
Implementation Method 1
The multi-dimensional antenna conductor structure is configured so that in the case of reciprocal operation of the antenna as a transmission antenna, antenna currents having at least approximately the same size flow in the individual pairs of antenna conductor sections
Data Source
AI summary
There is disclosed an antenna for reception of circularly polarized satellite radio signals. The antenna comprises at least one two-dimensional or three-dimensional antenna conductor structure connected with an antenna output connector. The multi-dimensional antenna conductor structure is configured so that it comprises a plurality of antenna conductor sections, which, with reference to a spatial reference point (z) common to the antenna conductor sections, are disposed in pairs, symmetrically and extending in the same direction. The multi-dimensional antenna conductor structure is furthermore configured so that during reciprocal operation of the antenna as a transmission antenna, antenna currents having at least approximately the same size flow in the individual pairs of antenna conductor sections, and the arithmetical average of the current phases of these antenna currents, counted in the same direction, in each instance, in the antenna conductor sections of each pair, has at least approximately the same value in the case of essentially all the pairs of antenna conductor sections, with reference to a common phase reference point (B), during reciprocal operation of the antenna as a transmission antenna. Such an antenna receives left-rotating circularly polarized waves and right-rotating circularly polarized waves equally. The vertical radiation diagram can be filled up towards low elevation angles by means of a vertical, electrically short monopole disposed at the phase reference point (B), whose reception signal is superimposed on that of the antenna conductor structure.