Composite Antenna Beam Tilting Through Patch-Linear Interference
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Solution Overview
Problem
Conventional patch antennas have difficulty tilting their beam away from the normal direction of the ground plane, limiting their directional flexibility in radio frequency wireless communication.
Innovation Solution
The antenna device incorporates a composite antenna configuration with a power feeding element and at least one linear antenna, where the power feeding line includes a main line connected to the power feeding element and a branch line connected to the linear antenna, allowing the radiation electric fields from both to interact and adjust the beam direction by strengthening or weakening each other in specific regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional patch antenna is used, then the antenna gain is maximized in the normal direction of the ground plane, but the beam cannot be tilted to directions inclined from the normal direction
Solution Approach 1:
The patent combines a patch antenna and a linear antenna into a composite antenna structure. The patch antenna provides gain in the normal direction while the linear antenna enables beam tilting, allowing the system to achieve both functions through merging rather than requiring separate antenna systems.
Solution Approach 2:
The composite antenna structure serves multiple functions: the patch antenna component maximizes gain in the normal direction while the integrated linear antenna component enables beam tilting to inclined directions. This multi-functional design allows a single antenna system to perform both normal direction radiation and directional beam tilting.
2Adaptability or versatility
If the beam direction is tilted away from the normal direction, then directional flexibility is improved, but the antenna gain in the normal direction decreases
Solution Approach 1:
The patent enables dynamic control of beam direction by adjusting the phase difference between the patch antenna and linear antenna through the branch line length. This dynamic adjustment allows the system to optimize between normal direction gain and tilted beam direction based on communication requirements.
Solution Approach 2:
The patent changes the phase parameter by varying the branch line length in the power feeding line, which controls the phase difference between the patch antenna and linear antenna. This parameter change enables continuous adjustment of the beam tilting angle while maintaining optimal gain characteristics.
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 enables the antenna to tilt its beam direction and increase gain in desired directions, providing greater directional flexibility and antenna performance.
Implementation Method 1
the composite antenna includes a power feeding element configuring a patch antenna together with the ground plane, and at least one linear antenna configured to flow an electric current having a component in a perpendicular direction with respect to the ground plane
Implementation Method 2
A radiation electric field from the patch antenna and a radiation electric field from the linear antenna strengthen each other in a partial region of space, and weaken each other in another partial region
Data Source
AI summary
A ground plane, at least one composite antenna, and a power feeding line configured to supply power to the at least one composite antenna are provided in or on a substrate. The composite antenna includes a power feeding element configuring a patch antenna together with the ground plane, and at least one linear antenna configured to flow an electric current having a component in a vertical direction with respect to the ground plane. The power feeding line includes a main line connected to the power feeding element, and a branch line branched from the main line and connected to the linear antenna.