Phase Sequencing Three-Phase Network for Broadband Amplitude Balance
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Solution Overview
Problem
Current broadband microwave three-phase networks lack phase and amplitude balance, which is crucial for flexible and robust antenna solutions, especially in space applications where flexibility and broad bandwidth are essential.
Innovation Solution
A phase sequencing three-phase network design that includes a transmission circuit dividing one input into three outputs with equal or non-equal amplitudes, allowing for equal phase division of 120 degrees between outputs, and is reciprocal for both transmitting and receiving modes, using a network topology with specific feed line sections and characteristic impedances to achieve phase and amplitude balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a broadband microwave three-phase network is designed, then bandwidth is improved, but phase and amplitude balance deteriorates
Solution Approach 1:
The feed network is divided into multiple discrete feed line sections (first through tenth sections) with specific characteristic impedances and electrical lengths. Each section is optimized independently to contribute to overall phase and amplitude balance across the broadband frequency range, resolving the contradiction between bandwidth and balance precision.
Solution Approach 2:
Different feed line sections have different characteristic impedances (e.g., 50Ω, 70.7Ω, 100Ω) and electrical lengths tailored to their specific positions in the network. This local optimization of impedance and length parameters enables precise control of phase and amplitude distribution across all three outputs while maintaining broadband performance.
2Adaptability or versatility
If phase sequencing is implemented for broadband operation, then adaptability is improved, but device complexity increases
Solution Approach 1:
The feed network employs asymmetric feed line sections with different characteristic impedances and electrical lengths rather than symmetric identical sections. This asymmetric design enables phase sequencing functionality across broadband frequencies while maintaining a relatively compact structure, balancing adaptability and complexity.
Solution Approach 2:
The feed network is designed to provide multiple functions: it divides power into three outputs with equal or unequal amplitudes, provides phase sequencing with 120-degree separation, operates in both transmitting and receiving modes, and maintains broadband performance. This multi-functionality reduces the need for separate components, managing complexity while enhancing adaptability.
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 provides a robust broadband feed network with reduced resonance frequency issues, suitable for both transmitting and receiving, and can be optimized to achieve desired phase and amplitude specifications, enhancing flexibility and performance in space applications.
Implementation Method 1
each feed line section in the first circuit and second circuit comprises one or more transmission line sections with a predetermined characteristic impedance and length
Data Source
AI summary
The invention relates to a phase sequencing three-phase network comprising a first side connected to a second side via the network. The first side comprises one endpoint (EP1) and the second side comprises three endpoints (EP2, EP3, and EP4). The network comprises five nodes (NP1-NP5) interconnected via feed line sections (FP1-FP10) comprising at least one transmission line section (R11-R102) each. The invention further relates to an optimization method for the network for deciding characteristic impedance and length of each transmission line section (R11-R102).