Dual-Frequency Reflective Antenna With Beam Scanning Aperture
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Solution Overview
Problem
Existing dual-frequency reflective array antennas can only realize fixed-beam pointing and cannot achieve beam scanning, which limits their operational flexibility.
Innovation Solution
A dual-frequency antenna design featuring a first antenna unit and a second antenna unit, with a filtering unit between them, allowing for beam scanning by adjusting the phase of electromagnetic waves across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-frequency reflective array antenna is used, then the antenna can operate at two different frequencies with a common aperture, but the beam scanning capability is lost and only fixed-beam pointing is achieved
Solution Approach 1:
The antenna is divided into two independent antenna units (first and second antenna units), each responsible for a specific frequency band. Each unit includes independent phase adjusting structures that can be controlled separately, enabling beam scanning for both frequencies while maintaining dual-frequency operation capability. This segmentation allows each frequency band to have its own beam control without interfering with the other.
2Ease of operation
If separate transmitting and receiving antennas are used for different frequencies, then beam scanning can be achieved, but the system complexity and cost increase
Solution Approach 1:
The patent merges the transmitting and receiving antenna functions into a single dual-frequency antenna system with a common aperture. The first and second antenna units share the same physical space and structural support, reducing the number of separate components needed. This combining approach maintains beam scanning capability while simplifying the overall system structure compared to using completely separate antenna systems.
Solution Approach 2:
The antenna system is designed with multi-functionality to serve dual purposes: it can operate at two different frequency bands (first and second frequency bands) and perform beam scanning at both frequencies. The common aperture and shared structural elements enable the system to handle multiple functions simultaneously, reducing complexity compared to dedicated single-function antenna systems.
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 proposed dual-frequency antenna enables beam scanning capabilities while maintaining a simple structure and low cost, allowing for efficient operation across different frequency bands.
Implementation Method 1
the filtering unit is configured to reflect an electromagnetic wave of the first frequency band and to transmit an electromagnetic wave of the second frequency band
Implementation Method 2
the first phase adjusting structure is electrically connected to the first radiation portion, and configured to adjust a phase of the electromagnetic wave of the first frequency band received by the first radiation portion
Data Source
AI summary
A dual-frequency antenna and an electronic device are provided, and belong to the field of communication technology. The dual-frequency antenna includes a first antenna unit and a second antenna unit opposite to each other, and a filtering unit therebetween. An operating frequency band of the first antenna unit is a first frequency band; an operating frequency band of the second antenna unit is a second frequency band; the filtering unit is configured to reflect an electromagnetic wave of the first frequency band and to transmit an electromagnetic wave of the second frequency band; the first antenna unit is configured to receive the electromagnetic wave of the first frequency band and to reflect the received electromagnetic wave of the first frequency band by the filtering unit; and the second antenna unit is configured to receive and reflect the electromagnetic wave of the second frequency band transmitted by the filtering unit.