Beam Switching Circuit for Multi-Pattern Two-Antenna Arrays
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Solution Overview
Problem
Existing antenna systems require multiple antennas to generate multiple radiation field patterns, leading to complex system designs.
Innovation Solution
A beam switching system incorporating a selection circuit and a branch line coupler, which allows for the selection of output ports to control the radiation field patterns using a controller, enabling two antennas to generate multiple patterns with a simplified design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If more antennas are used to generate more radiation field patterns, then the number of radiation field patterns increases, but the system design becomes more complex
Solution Approach 1:
The patent employs a switching mechanism that dynamically reconfigures the connection between the two antennas and the output ports based on control signals. This dynamic switching allows the system to generate multiple radiation field patterns (including broadside, endfire, and intermediate patterns) without adding more antennas, thereby resolving the contradiction between pattern diversity and system complexity
Solution Approach 2:
The patent introduces a temporal dimension through time-varying phase shifting and switching operations. By changing the phase relationships and connection configurations over time, the system generates different radiation patterns sequentially, achieving pattern diversity without increasing the spatial dimension (number of antennas) or structural complexity
Data Source
AI summary
A beam switching system, beam switching method, and antenna device are provided. The beam switching system includes a selection circuit and a branch line coupler. The selection circuit includes an input port for receiving the input radio frequency signal and two output ports. The selection circuit selects at least one of its two output ports to output the output radio frequency signal. The branch line coupler includes two input ports respectively coupled to two output ports of the selection circuit and used to receive the output radio frequency signal, and two output ports respectively used to couple two antennas.