Dual-Substrate Feeding Structure for Low-Loss Microwave Phase Shifting
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Solution Overview
Problem
Conventional phase shifters with adjustable dielectric constants suffer from high signal loss and low phase shifting efficiency per unit loss.
Innovation Solution
A feeding structure with a dual-substrate configuration, featuring a dielectric layer between substrates and electrodes with specific branch arrangements and impedance matching, allows for efficient power division and phase shifting by controlling microwave signal distribution between transmission lines, utilizing a liquid crystal layer for phase adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single-line transmission structure is used to realize phase shifting by adjusting phase speed, then the device structure is simple, but the signal loss is high and phase shifting efficiency per unit loss is low
Solution Approach 1:
The single-line transmission structure is segmented into multiple parallel transmission lines with different electrical lengths. This segmentation allows the signal to be divided into multiple paths, each contributing differently to the overall phase shift, thereby reducing signal loss while maintaining structural feasibility.
Solution Approach 2:
The invention transitions from a one-dimensional single-line structure to a multi-dimensional parallel structure. By adding the dimension of multiple parallel transmission lines with varying lengths, the system achieves better phase control and reduced loss without excessive complexity.
2Productivity
If a single-line transmission structure is used for phase shifting, then the device structure is simple, but the phase shifting efficiency per unit loss is low
Solution Approach 1:
The transmission path is segmented into multiple parallel lines with progressively varying lengths. This segmentation enables more efficient phase shifting by distributing the phase adjustment across multiple paths, improving phase shifting efficiency per unit loss.
Solution Approach 2:
Each transmission line in the parallel structure has locally optimized characteristics, with different lengths tailored to contribute specific phase shifts. This local optimization of line lengths enhances the overall phase shifting efficiency while managing complexity.
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 proposed solution achieves a low signal loss and high phase shifting efficiency per unit loss, enabling effective phase control in microwave radio frequency devices.
Implementation Method 1
A phase shifter with an adjustable dielectric constant is a phase shifter for realizing a phase shifting effect by adjusting a dielectric constant of a dielectric layer of this phase shifter
Implementation Method 2
the dielectric layer includes a liquid crystal layer
Data Source
AI summary
A feeding structure is provided. The feeding structure includes a feeding unit, which includes: a reference electrode, first and second substrates opposite to each other, and a dielectric layer between the first and second substrates. The first substrate includes a first base plate and a first electrode thereon. The first electrode includes a first main body and a plurality of first branches connected to the first main body and spaced apart from each other. The second substrate includes a second base plate and a second electrode thereon. The second electrode includes a second main body and a plurality of second branches, which are connected to the second main body, spaced apart from each other, and in one-to-one correspondence with the plurality of first branches. Orthographic projections of each second branch and a corresponding first branch on the first base plate partially overlap each other.