Antenna Module Feed Line Segmentation for Leakage Reduction
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Solution Overview
Problem
In antenna devices and modules, the placement of feed points offset from the central part of antenna elements leads to radio wave leakage from feed lines, causing interference and degradation of communication quality, especially when antenna directivity is inclined.
Innovation Solution
The feed line within the dielectric substrate is divided to supply radio frequency signals to two feed points with opposite phases, reducing radio wave leakage by allowing interference cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feed point is placed at a position shifted away from the central part of the antenna element to match impedances, then impedance matching is improved, but radio wave leakage from the feed line increases causing interference and degradation of communication quality
Solution Approach 1:
The feed line is divided into two separate feed lines, each connecting to a different feed point on the antenna element. This segmentation allows the system to distribute the signal path and reduce the harmful radiation effect that would occur with a single offset feed point, while still achieving proper impedance matching through the distributed configuration.
Solution Approach 2:
Two feed lines are combined to feed the antenna element, with their radiation effects being merged in a constructive manner. By positioning the feed points and feed lines appropriately, the harmful radiation from individual feed lines combines to produce a balanced overall radiation pattern that reduces interference and improves communication quality.
2Adaptability or versatility
If the directivity of antenna is inclined in the antenna array to improve coverage, then communication coverage is improved, but radio wave leakage from feed line interferes with radiated wave causing deviation of peak gain
Solution Approach 1:
The feed system is segmented into two independent feed lines that can be individually optimized for different inclination directions. This allows the antenna array to maintain accurate peak gain characteristics when directivity is inclined, as each feed line contributes balanced radiation that prevents interference patterns from degrading the overall antenna performance.
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 configuration equalizes peak gains and improves communication quality by reducing the impact of feed line radiation on antenna performance, even when directivity is inclined.
Implementation Method 1
a feed line that transmits a radio frequency signal from a radio frequency element to the antenna element
Implementation Method 2
a phase of the radio frequency signal to the first feed point and a phase of the radio frequency signal to the second feed point being substantially opposite to one another
Data Source
AI summary
An antenna module includes a plurality of antenna devices. Each of the plurality of antenna devices includes a dielectric substrate on which an antenna element is placed and a feed line that transmits a radio frequency signal from a RFIC to the antenna element. The feed line is divided within the dielectric substrate and transmits a radio frequency signal to a feed point (122A-1) and a feed point (122A-2) of the antenna element, a phase of the radio frequency signal to the feed point (122A-1) and a phase of the radio frequency signal to the feed point (122A-2) being substantially opposite to one another.