Phased-Array Transceiver Beam Steering with Active Passive Networks
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Solution Overview
Problem
Phased array systems operating at millimeter-wave frequencies face challenges in manufacturing variations and environmental sensitivities, which affect their performance and efficiency, especially in integrated chip designs used for beam-steering applications at 60-GHz frequencies.
Innovation Solution
The implementation of a phased-array transmitter and receiver with a combination of active and passive phase-shifting and power-combining elements, including a power distribution network and digital control systems, to adjust gain and phase settings dynamically, compensating for manufacturing and environmental variations, and utilizing beam tables for precise beam steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If phased array systems are implemented on integrated chip designs, then device size and integration are improved, but manufacturing variations and environmental sensitivities worsen
Solution Approach 1:
The patent implements feedback mechanisms where the system measures actual performance parameters and automatically adjusts control settings to compensate for manufacturing variations and environmental changes, maintaining reliable operation despite integrated chip constraints
Solution Approach 2:
The system dynamically adjusts operational parameters such as phase shifts and gain settings to compensate for manufacturing variations and environmental sensitivities, allowing the phased array to maintain optimal performance across different operating conditions
2Reliability
If beam-steering technology is implemented, then spatial selectivity and communication reliability are improved, but system complexity increases
Solution Approach 1:
The patent divides the phased array system into multiple independent signal paths, each with its own phase shifter and amplifier, allowing individual control and optimization of each element while maintaining overall system functionality
Solution Approach 2:
The system employs universal control mechanisms that can steer beams in multiple directions and adapt to different communication scenarios, providing spatial selectivity and reliability through multi-functional phase-shifting capabilities
3Adaptability or versatility
If multiple signal paths with variable time delay are used, then beam steering capability is improved, but power consumption increases
Solution Approach 1:
The patent employs dynamic control of phase shifters and amplifiers, adjusting their operation based on actual beam steering requirements rather than maintaining constant high-power operation, thereby reducing overall power consumption while preserving beam steering capability
Solution Approach 2:
The system optimizes power consumption by dynamically changing operational parameters of phase shifters and variable amplifiers according to the specific beam steering task, reducing energy usage when full power is not required
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 enables efficient beam-steering with a wide signal dynamic range and reduced power consumption, supporting multi-Gb/s non-line-of-sight links by compensating for variations and optimizing power distribution, thereby enhancing the reliability and performance of millimeter-wave communications.
Implementation Method 1
control of the time delay difference between successive antenna signal paths
Implementation Method 2
each including a phase shifter configured to delay the signal in accordance with the given direction
Implementation Method 3
a variable amplifier configured to adjust the gain of the signal
Implementation Method 4
power-combining elements
Implementation Method 5
the combined output signal will have a larger amplitude in a desired direction than could be obtained with a single element
Implementation Method 6
steering' the electromagnetic beam using the interference of multiple waves
Implementation Method 7
using the interference of multiple waves
Data Source
AI summary
A phased-array receiver that may be effectively implemented on a silicon substrate. A receiver includes multiple radio frequency (RF) front-ends, each configured to receive a signal with a given delay relative to the others such that the gain of the received signal is highest in a given direction. The receiver also includes a power combination network configured to accept an RF signal from each of the RF front-ends and to pass a combined RF signal to a down-conversion element, where the power distribution network includes a combination of active and passive components. Each RF front-end includes a phase shifter configured to delay the signal in accordance with the given direction and a variable amplifier configured to adjust the gain of the signal.