Phase-Coded MIMO Radar Front-End With Unified Doubler Cores
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Solution Overview
Problem
Current near-THz radar systems face inefficiencies in phase-coded MIMO operation due to architectural and circuit-level limitations, leading to power inefficiencies and limited broadband operation.
Innovation Solution
A phase-coded transmitter front-end architecture for MIMO radars that integrates frequency multiplication, power amplification, and phase-coding functionalities into a unified transmitter block using a quadrature-phased distributed doubler core, enabling efficient broadband operation and high output power at near-THz frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional separate modules are used for frequency multiplication and phase coding, then functional flexibility is maintained, but device complexity and power combining losses increase
Solution Approach 1:
The patent merges frequency multiplication and phase coding functions into a single unified doubler core structure. The distributed doubler core simultaneously performs frequency doubling and phase modulation by processing quadrature signals through integrated nonlinear elements, eliminating the need for separate frequency multiplication and phase coding modules.
Solution Approach 2:
The unified doubler core serves multiple functions: frequency multiplication (doubling), phase coding (0-180 degree modulation), and power amplification. The circuit implements all these functions through a single multi-functional block, reducing overall system complexity while maintaining adaptability for different radar operating modes.
2Power
If conventional power combining methods are used, then output power is achieved, but efficiency is reduced due to power combining losses
Solution Approach 1:
The patent combines power amplification with frequency multiplication in the unified doubler core, eliminating separate power combining stages. The distributed structure inherently combines power from multiple parallel paths without requiring additional power combining networks, thereby reducing power combining losses while achieving high output power.
3Adaptability or versatility
If broadband operation is implemented, then operational flexibility improves, but circuit complexity increases
Solution Approach 1:
The doubler core is divided into multiple identical parallel units, each handling a portion of the broadband spectrum. This segmented distributed structure enables broadband operation by processing multiple frequency components simultaneously through parallel identical cells, avoiding the need for complex frequency-dependent tuning circuits.
Solution Approach 2:
The unified doubler core design provides broadband operation through its frequency-independent distributed structure. The same circuit topology operates effectively across a wide frequency range, eliminating the need for separate broadband and narrowband circuits, thus reducing overall circuit complexity while maintaining operational flexibility.
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 achieves broadband operation, high output power, and improved efficiency by embedding phase coding into the frequency multiplication path, reducing complexity and overcoming power combining losses in radar systems.
Implementation Method 1
a distributed doubler core comprising a plurality of unified doubler cores coupled to a plurality of input transmission lines to receive the phased signals and coupled to a common output transmission line, at least one processor and at least one memory having instructions stored thereon such that, when executed, the instructions cause the plurality of unified doubler cores of the distributed doubler core to process the phased signals to produce, using complimentary bias control signals, a phase-coded output signal at an output frequency, wherein the output frequency is at least twice the input frequency
Data Source
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AI summary
A system (200, 300, 400, 500) and method are provided for an implementation of a phase-coded transmitter front-end architecture for a multiple input, multiple output (MIMO) radar system. This architecture achieves broadband operation, supports major power savings, delivers high wireless power, and operates in the near-THz range. Power combining implementations are also provided.