Dual-Path Antenna Aperture Layout for High Signal Isolation
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Solution Overview
Problem
Conventional dual-emitting-port antennas suffer from signal coupling and low isolation, affecting radiation efficiency, especially in high-frequency bands like millimeter waves used for wireless backhaul.
Innovation Solution
The antenna system employs a design where radiation sources are arranged back-to-back along the same axis, with one radiation source emitting a signal reflected by a reflective surface to a ring-shaped transmission area and the other emitting through the inner diameter of this area, ensuring independent radiation paths and reducing coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual-emitting-port antennas are used to transfer different signals, then communication efficiency and capacity are improved, but signal coupling occurs and isolation decreases
Solution Approach 1:
The antenna system divides the aperture into distinct radiation regions: a central region for the first signal and an annular region for the second signal. This spatial segmentation of the radiation aperture prevents signal coupling while maintaining dual-signal transmission capability, directly resolving the contradiction between communication efficiency and signal isolation.
Solution Approach 2:
The patent transitions from conventional planar antenna designs to a three-dimensional aperture distribution structure with central and annular regions. This dimensional change enables independent signal paths in the spatial domain, achieving high isolation while maintaining dual-port operation for improved communication efficiency.
2Productivity
If dual-emitting-port antennas are used to transfer different signals, then communication capacity is improved, but radiation efficiency decreases
Solution Approach 1:
By segmenting the aperture into central and annular radiation regions with distinct phase and amplitude distributions, the system enables independent optimization of each signal's radiation pattern. This prevents energy loss from signal interference and coupling, maintaining high radiation efficiency while supporting dual-signal transmission for improved communication capacity.
Solution Approach 2:
The patent applies different local quality characteristics to different regions of the aperture: the central region has specific phase and amplitude properties optimized for the first signal, while the annular region has properties optimized for the second signal. This local optimization ensures each signal radiates efficiently without being degraded by the other, resolving the contradiction between communication capacity and radiation efficiency.
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 enhances radiation efficiency by avoiding signal coupling and improving isolation, allowing for high-frequency band communication with increased capacity and spectral efficiency, and supports hybrid networking of microwave and free space optical signals for complementary channel performance.
Implementation Method 1
the reflection apparatus is configured to reflect the first signal to the ring-shaped transmission area of the first transmission apparatus by using the reflective surface
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
This application discloses an antenna system. The antenna system includes a first radiation source, a second radiation source, a reflection apparatus, and a first transmission apparatus. A direction of an emitting port of the first radiation source and a direction of an emitting port of the second radiation source are arranged back to back along a same axis, and a reflective surface of the reflection apparatus and the first transmission apparatus are arranged opposite to each other. The first radiation source is configured to emit a first signal to the reflective surface of the reflection apparatus. The reflection apparatus is configured to reflect the first signal to a ring-shaped transmission area of the first transmission apparatus by using the reflective surface. The first transmission apparatus is configured to radiate, out of the antenna system through the ring-shaped transmission area, the first signal reflected by the reflective surface. The second radiation source is configured to emit a second signal, where the second signal is radiated out of the antenna system through an area formed based on an inner diameter of the ring-shaped transmission area. This implements radiating, in a same aperture and with mutually independent radiation paths, the signals from different emitting ports, thereby improving radiation efficiency of the antenna system.