Waveguide-Microstrip Converter Layout for Leakage Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The waveguide microstrip line converter faces challenges in achieving high reliability and reducing leakage of electromagnetic waves.
Innovation Solution
The converter includes a waveguide with an open end, a dielectric substrate with a ground conductor and a slot, and line conductors with specific impedance transforming units to improve impedance matching and reduce electromagnetic wave radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional waveguide microstrip line converter structure is used, then the basic signal transmission function is achieved, but electromagnetic wave leakage occurs and reliability is reduced
Solution Approach 1:
The patent converts the harmful electromagnetic wave leakage into a beneficial effect by strategically positioning conductors to generate electromagnetic waves that cancel out the leaked waves through destructive interference. The second conductor is positioned to radiate electromagnetic waves that are out of phase with the leaked waves from the slot, thereby reducing the net leakage and improving converter reliability.
Solution Approach 2:
The patent introduces a second conductor as an intermediary element that mediates the electromagnetic field between the slot and the external environment. This conductor acts as a controlled source of electromagnetic radiation that interferes with and reduces the unwanted leakage from the slot, serving as a mediator to achieve the desired electromagnetic compatibility.
2Ease of manufacture
If the microstrip line width is uniform, then the manufacturing is simple, but impedance matching between different sections is poor
Solution Approach 1:
The patent applies local quality by varying the width of the microstrip line at specific locations to achieve impedance matching. The first microstrip line has a first width, and the second microstrip line has a second width different from the first, allowing each section to have optimized impedance characteristics. This localized variation in geometry enables precise impedance control while maintaining overall manufacturing simplicity.
Data Source
AI summary
A waveguide microstrip line converter includes: a waveguide; a dielectric substrate; a ground conductor provided with a slot; a line conductor; and a conductor located at a distance from the line conductor and adjacent to the line conductor. The line conductor includes a microstrip line, a conversion unit, a first impedance transforming unit, a second impedance transforming unit, and a third impedance transforming unit, the microstrip line having a first line width, the conversion unit being located immediately above the slot and having a second line width larger than the first line width, the first impedance transforming unit, the second impedance transforming unit, and the third impedance transforming unit extending in a first direction from the conversion unit and having a role in impedance matching between the microstrip line and the conversion unit. The conductor is adjacent to at least part of the conversion unit of the line conductor.