Shutter-Structured Antenna Filter for Co-Channel Interference
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Solution Overview
Problem
Co-channel interference in microwave devices operating in the same frequency band limits spectral efficiency, and existing solutions are limited to devices from the same provider, affecting target service signals.
Innovation Solution
An antenna with a filter component having a lossy dielectric filter layer forming a spatial structure like a shutter, positioned perpendicular to the optical axis, which suppresses interference signals by implementing antenna sidelobe suppression, thereby reducing the impact on target service signals and allowing inter-provider communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If precoding and digital baseband interference cancellation algorithms are used to suppress interference, then interference suppression capability is improved, but the target service signal is affected and application scenarios are limited to same-provider devices
Solution Approach 1:
The interference suppression function is segmented from the signal processing domain to the physical antenna domain. The antenna aperture is divided into multiple sub-apertures, each independently controlled to suppress interference from different directions, enabling physical-layer interference rejection that does not affect service signals or require provider-specific protocols
Solution Approach 2:
A phase gradient metasurface is introduced as an intermediary component between the antenna aperture and free space. This metasurface acts as a spatial filter that selectively redirects interference signals while preserving service signals, achieving interference suppression without affecting target communication between devices from different providers
2Object-affected harmful factors
If conventional interference suppression methods are applied, then interference signals are reduced, but spectral efficiency improvement is limited due to co-channel interference in same frequency band
Solution Approach 1:
Different regions of the antenna aperture are assigned different phase gradient values, creating local variations in electromagnetic field distribution. This allows selective suppression of co-channel interference from specific directions while maintaining signal reception from desired directions, thereby improving spectral efficiency in frequency-reuse scenarios
Solution Approach 2:
The phase gradient parameter of the metasurface is dynamically adjusted to adapt to different interference environments. By changing the phase distribution pattern across the aperture, the antenna can suppress interference from varying directions and frequencies, enabling improved spectral efficiency across different operating conditions
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 effectively suppresses co-channel interference across different microwave devices, enhancing spectral efficiency and expanding application scenarios beyond same-provider networks without significantly affecting target service signals.
Implementation Method 1
a filter component having a lossy dielectric filter layer forming a spatial structure like a shutter
Data Source
Figure 1
Figure 2A
Figure 2B~3A
AI summary
Embodiments of the present invention provide an antenna, a microwave device, and a communications system. The antenna includes an antenna body and a filter component. The antenna body has an antenna aperture and is configured to send and receive a radio frequency signal that passes through the antenna aperture, and the antenna body has an optical axis. The filter component is located at the antenna aperture and is disposed perpendicular to the optical axis, and is configured to filter an interference signal in the radio frequency signal. The filter component includes a filter layer and a support component, where the filter layer is formed by a lossy dielectric, and the support component is configured to support the filter layer, so that the filter layer forms a spatial structure similar to a shutter. The antenna provided in the embodiments of the present invention can suppress an antenna sidelobe, so that a problem is resolved that an interference suppression process affects a target service signal, and an application scenario is not limited.