Antenna Feed Layout With Central Cable Routing to Limit Pattern Disturbance
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Solution Overview
Problem
In antenna systems, particularly those with multiple antennas in a restricted space, the installation and routing of feeding lines and electrical components can disturb the radiation pattern, leading to increased line losses and reduced performance.
Innovation Solution
The implementation of a cable guide that routes non-feeding lines along the center axis of the antenna, minimizing cable length and interference with the radiation pattern by positioning openings in the feeding portion of the antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are installed in a restricted space, then space utilization is improved, but the radiation pattern is disturbed due to mutual interference between antennas
Solution Approach 1:
The patent positions multiple antennas at different vertical heights along the same central axis, transitioning from horizontal placement to vertical stacking. This dimensional change allows antennas to be closely spaced without causing mutual interference, as the vertical separation decouples their electromagnetic fields while maintaining omnidirectional coverage patterns.
Solution Approach 2:
The patent employs asymmetric cable routing where the feeding cable enters the lower antenna from the bottom and the upper antenna's cable enters from the top, both routing cables along the central axis in opposite directions. This asymmetric arrangement minimizes cable interference with the radiation pattern while accommodating both antennas in a compact vertical configuration.
2Ease of operation
If the feeding line is routed in front of the antenna, then connection is simplified, but the radiation pattern is disturbed in the direction of the feeding line
Solution Approach 1:
The patent routes the feeding cable asymmetrically through the central axis of the antenna rather than along the front aperture. The cable enters from the bottom, passes through the antenna structure centrally, and exits at the top, creating an asymmetric path that minimizes interference with the omnidirectional radiation pattern while maintaining electrical connection.
Solution Approach 2:
The patent extracts the feeding cable from the traditional front-aperture routing position and relocates it through the central axis of the antenna. This extraction removes the cable from the harmful position where it would disturb the radiation pattern, while the cable still performs its essential function of delivering power and signals to the antenna elements.
3Loss of energy
If the cable length is reduced to minimize line loss, then energy efficiency is improved, but the cable routing becomes more complex to avoid disturbing the radiation pattern
Solution Approach 1:
The patent employs asymmetric cable routing where each antenna's feeding cable travels along the central axis in opposite directions (one from bottom to top, the other from top to bottom). This asymmetric arrangement allows both cables to be routed through the same central space without interfering with each other or the radiation pattern, minimizing cable length while avoiding routing conflicts.
Solution Approach 2:
The patent utilizes the vertical dimension for cable routing by passing cables through the central axis of the antenna structure rather than routing them horizontally in front of the aperture. This dimensional change allows cables to be shortened while avoiding interference with the radiation pattern, as the vertical central path is electromagnetically isolated from the horizontal radiation fields.
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 approach minimizes line losses and disturbance to the radiation pattern, ensuring optimized radiation performance and improved overall system efficiency.
Implementation Method 1
The feeding portion converts the electrical signals received via the feeding line into electromagnetic waves to be radiated over-the-air
Data Source
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AI summary
An antenna system (10) comprises at least one antenna (12), a feeding line (18) and a cable guide (30) for a line (32) not feeding the at least one antenna (12). The at least one antenna (12) has a feeding portion (20) to which the feeding line (18) is assigned. The cable guide (30) has an opening (34) that is provided in the feeding portion (20).