Planar Dual-Polarized Omnidirectional Antenna for Space Reduction
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Solution Overview
Problem
Conventional dual-polarized omnidirectional antennas require large space for deployment due to the horizontal loop antenna, hindering miniaturization.
Innovation Solution
The antenna design incorporates two dipole radiation arms and two monopole radiation arms in the same plane, with specific lengths and spacings optimized for electromagnetic wave radiation and superposition, and a shared ground plane, allowing for planarization and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional horizontal loop antenna is used to generate horizontal polarization omnidirectional beam, then the antenna can achieve dual-polarized omnidirectional radiation, but large space is needed for deployment which hinders miniaturization
Solution Approach 1:
The patent transitions from a conventional horizontal loop antenna structure to a planar configuration where dipole and monopole radiation arms are arranged in the same plane. This dimensional reorganization allows the antenna to maintain dual-polarized omnidirectional radiation capability while significantly reducing the deployment space required, enabling miniaturization of the antenna system.
Solution Approach 2:
The patent combines dipole radiation arms and monopole radiation arms in the same plane, with both types of arms sharing a common ground plane. This merging of previously separate antenna components into a unified planar structure reduces overall antenna size while maintaining the ability to generate both horizontal and vertical polarization omnidirectional beams.
2Area of stationary object
If the dipole radiation arms and monopole radiation arms are arranged in the same plane, then the antenna size is reduced and miniaturization is enabled, but the radiation efficiency and superposition efficiency must be maintained
Solution Approach 1:
The patent optimizes the local configuration of radiation arms by specifying that dipole radiation arms are disposed in parallel to the ground plane while monopole radiation arms are vertically disposed on the ground plane. This local quality differentiation ensures that each arm type contributes optimally to its polarization component while maintaining overall compactness and efficiency.
Solution Approach 2:
The patent specifies that both dipole and monopole radiation arms have lengths of one eighth to three eighths of the guided-wave wavelength, with optimal performance at one quarter wavelength. This parameter optimization ensures resonance with electromagnetic waves, maximizing radiation efficiency and superposition efficiency while maintaining the compact planar structure.
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 design minimizes the size of the dual-polarized omnidirectional antenna while maintaining effective electromagnetic wave radiation and superposition efficiency, facilitating miniaturization without compromising performance.
Implementation Method 1
When an alternating current flows on the dipole radiation arm, electromagnetic wave radiation may occur. When the length of the dipole radiation arm is one eighth of the guided-wave wavelength to three eighths of the guided-wave wavelength, the dipole radiation arm can have good radiation effects.
Implementation Method 2
When the length of the dipole radiation arm is one quarter of the guided-wave wavelength. In this case, the dipole radiation arm can generate a resonance with the electromagnetic wave, so that the dipole radiation arm converts the current into an electromagnetic wave or converts the received electromagnetic wave into a current with high efficiency.
Implementation Method 3
Electromagnetic waves on the dipole radiation arms are superposed through mirror reflection on the ground plane. When the distances between the two dipole radiation arms and the ground plane are one eighth of the guided-wave wavelength to three eighths of the guided-wave wavelength, superposition efficiency is good.
Data Source
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AI summary
An antenna and a communication device are disclosed, and relate to the field of communication device technologies. The antenna includes a ground plane and at least one group of antenna elements disposed on the ground plane. One group of antenna elements include two dipole radiation arms and two monopole radiation arms. A feed point is provided on the dipole radiation arms and/or the monopole radiation arms. The dipole radiation arms are provided with a support structure. For a same group of antenna elements, both the two dipole radiation arms are disposed in parallel to the ground plane via the support structure; both the two monopole radiation arms are vertically disposed on the ground plane; and both the two dipole radiation arms are located between the two monopole radiation arms, and the two dipole radiation arms and the two monopole radiation arms are in a same plane. In this application, planarization of a dual-polarized omnidirectional antenna is implemented, and a size of the dual-polarized omnidirectional antenna is reduced.