Antenna Phase Compensation via Cable Length Adjustment
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Solution Overview
Problem
In dual-band antennas, the phase difference between radiator elements on different planes causes degradation in radiation characteristics of the first frequency-band signal when trying to align the second radiator elements with those stacked on the first radiator elements, affecting the overall performance.
Innovation Solution
The method involves calculating and compensating for the phase difference between signals radiated from radiator elements on different planes by adjusting the lengths of power supply cables connected to them, ensuring that the phase difference between signals from the power supply cables matches the phase difference caused by the height difference between the installation planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the independently installed second radiator elements are installed high by means of an auxiliary device to be even with the second radiator elements stacked on the first radiator elements, then the phase difference between radiator elements is reduced, but the radiation characteristics of the first radiator elements are adversely affected and degraded
Solution Approach 1:
The patent changes the electrical parameter (cable length) to compensate for the physical parameter (height difference). By adjusting the length of power supply cables connected to radiator elements on different planes, the phase difference caused by height differences is compensated, allowing radiator elements to remain on different planes without degrading radiation characteristics.
2Device complexity
If the second radiator elements are installed on different planes, then the antenna structure is simplified and miniaturized, but a phase difference is produced when signals are radiated
Solution Approach 1:
The patent introduces power supply cables as intermediary elements that mediate between the power source and radiator elements on different planes. These cables serve as adjustable phase compensation mechanisms, allowing the antenna to maintain a compact structure while correcting phase differences through cable length adjustment.
3Reliability
If the lengths of power supply cables are adjusted to compensate for phase difference, then the radiation characteristics of second radiator elements are improved, but the complexity of cable installation increases
Solution Approach 1:
The patent applies parameter changes to cable length as a straightforward manufacturing adjustment. By providing specific cable length specifications for different radiator element positions, the patent transforms a complex phase compensation problem into a simple dimensional parameter adjustment that can be easily implemented during assembly.
Data Source
AI summary
A method for installing radiator elements arranged on different planes and an antenna having the radiator elements are provided, in which a first-position radiator element is placed on one plane, a second-position radiator element is placed on another plane, and power supply cables are connected to the first-position radiator element and the second-position radiator element. The power supply cables are designed to compensate for a phase difference between signals radiated in the air from the first-position radiator element and the second-position radiator element by a phase difference between signals propagated via the power supply cables.