Phased Array Antenna Local Leak Signal Suppression
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Solution Overview
Problem
Current radio communication systems using high-frequency bands face challenges in suppressing local leak signals, which interfere with transmission signals, leading to signal quality degradation due to the complexity and power consumption of calibration circuits required for phase control in array antennas.
Innovation Solution
A radio communication apparatus and method that independently control the radiation directions of local leak signals and transmission signals using local signal phase shifters and baseband signal phase shifters, eliminating the need for calibration circuits by optimizing phase shifts to suppress local leak signals and enhance signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calibration circuits are used to suppress local leak signals in array antennas, then signal quality is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the phase control function from complex calibration circuits and implements it through simple phase shifters integrated into the signal transmission paths. By separating the phase control function from the calibration system, the patent eliminates the need for complex calibration circuits while maintaining signal quality through independent phase adjustment of transmission and local leak signals
Solution Approach 2:
The patent enables the system to self-adjust phase differences through built-in phase shifters that directly control the transmission signal and local leak signal phases. This self-service mechanism eliminates the need for external calibration circuits, reducing device complexity while maintaining the ability to suppress local leak signals through phase difference control
2Reliability
If calibration circuits are used to suppress local leak signals in array antennas, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent extracts the power-intensive calibration circuit function and replaces it with energy-efficient phase shifters. By moving the phase control function to simple phase-shifting components in the signal paths, the patent dramatically reduces power consumption while maintaining the ability to suppress local leak signals through phase difference control
Solution Approach 2:
The system uses self-service phase shifters that require minimal power to adjust signal phases. These phase shifters directly control the transmission and local leak signals without requiring continuous calibration power, enabling sustained signal quality improvement with significantly reduced power consumption compared to active calibration circuits
3Productivity
If phase control is implemented in array antennas to control radiation direction, then transmission performance is improved, but local leak signals interfere with transmission signals
Solution Approach 1:
The patent applies different phase control strategies to different signal components: transmission signals use one phase configuration for optimal radiation direction, while local leak signals use a different phase configuration to minimize interference. This local quality differentiation allows simultaneous optimization of transmission performance and suppression of harmful local leak signals through independent phase control
Solution Approach 2:
The patent implements preliminary phase adjustment of local leak signals to counteract their interference effect before they combine with transmission signals. By pre-controlling the phase of local leak signals through dedicated phase shifters, the system creates destructive interference for the harmful components while preserving the transmission signal integrity, thereby improving overall transmission performance
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 approach effectively reduces the radiation of local leak signals into the transmission direction, improving signal quality and reducing power consumption by simplifying the circuit configuration without the need for calibration circuits.
Implementation Method 1
local signal phase shifters 11-1 to 11-h and baseband signal phase shifters 12-1 to 12-h
Data Source
AI summary
In a phased array antenna radio communication apparatus including a plurality of antennas, a radio communication apparatus is provided which can reduce an influence of the local leak signals on the radiation direction of transmission signals. Local signal phase shifters 11-1 to 11-h are used to control phases of local signals to be input to quadrature modulators 13-1 to 13-h, and baseband signal phase shifters 12-1 to 12-h are used to control phases of baseband signals to be input to the quadrature modulators 13-1 to 13-h. The radiation direction of the local leak signals to be sent from transmission antennas 15-1 to 15-h can be controlled by the local signal phase shifters 11-1 to 11-h, and the radiation direction of the transmission signals can be controlled by both of the local signal phase shifters 11-1 to 11-h and the baseband signal phase shifters 12-1 to 12-h.