Compact Antenna With Floating Ground Plane and Through-Strand Dipole
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing compact antenna devices face limitations in achieving maximum gain in the azimuthal plane due to the spatial finiteness of the ground plane, which disturbs the radiation pattern and requires increased size to enhance gain, such as through the use of a skirt, compromising compactness.
Innovation Solution
A compact antenna device with a ground plane at floating potential and dipole antennas extending through it, featuring first and second strands on either side of the ground plane, along with a control circuit to manage the dipole antennas, reducing pattern disturbance and enabling super-directivity and reconfigurability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a skirt is added to extend under the ground plane to reduce elevation angle and increase gain, then the gain in the azimuthal plane is improved, but the size of the antenna is considerably increased
Solution Approach 1:
The dipole antenna strands extend vertically through the ground plane in the third dimension (elevation direction), rather than extending horizontally in the azimuthal plane. This dimensional change allows the antenna to achieve proper radiation pattern characteristics without increasing the horizontal footprint or requiring additional structures like skirts, thereby maintaining compactness while improving gain.
2Volume of moving object
If the ground plane is made spatially finite to maintain compactness, then the size is reduced, but the radiation pattern is disturbed and gain is reduced
Solution Approach 1:
The dipole antenna is segmented into first and second strands that extend in opposite vertical directions through the ground plane. This segmentation allows each strand to contribute independently to the radiation pattern, creating balanced electromagnetic fields that reduce distortion caused by the finite ground plane and improve overall gain while maintaining compact dimensions.
3Device complexity
If monopole antennas are used with a ground plane, then the structure is simple and compact, but the radiation pattern is offset from the azimuthal plane
Solution Approach 1:
The dipole antenna structure introduces asymmetry relative to the ground plane by extending strands in both vertical directions (above and below), breaking the symmetry of traditional monopole configurations. This asymmetric arrangement balances the electromagnetic fields and centers the radiation pattern in the azimuthal plane, correcting the offset issue while maintaining structural simplicity.
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 solution maintains compactness while maximizing gain in the azimuthal plane, reduces cross-polarization, and allows for beam direction variation and reconfiguration, achieving super-directionality and efficient radiation patterns without increasing size.
Implementation Method 1
the capability of an antenna to concentrate the radiated energy within a solid angle or in a specific direction
Implementation Method 2
a ground plane at floating potential
Implementation Method 3
the first and second strands of the or each dipole antenna, which extend on either side of the ground plane. Specifically, such a geometrical configuration of the strands makes it possible to limit the disturbance of the radiation pattern
Data Source
AI summary
A compact antenna device has a ground plane at floating potential and at least one dipole antenna extending through the ground plane. The at least one dipole antenna has first and second strands extending on either side of the ground plane. A control circuit is arranged on the ground plane in order to control the at least one dipole antenna.