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Applying Characteristic Impedance Compensation Cut-Outs to Full Radio Frequency Chains in Multi-Layer Printed Circuit
Vaidotas Barzdenas1, Aleksandr Vasjanov1
1Department of Computer Science and Communications Technologies, Vilnius Gediminas Technical University, 10105 Vilnius, Lithuania.
Sensors (Basel, Switzerland)
|January 26, 2024
Summary
This study enhances microstrip line signal integrity for wireless systems by introducing a novel structure that mitigates impedance discontinuities caused by surface mount technology (SMT) pads. The proposed compensation techniques effectively improve impedance matching and transmission performance in high-frequency applications.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Signal Integrity
Background:
- Modern wireless communication systems are crucial for healthcare, education, IoT, and 5G, necessitating advanced electronic devices.
- Improving wireless systems requires addressing engineering challenges in microstrip line signal integrity.
- Surface mount technology (SMT) component pads can negatively impact signal integrity in high-frequency circuits.
Purpose of the Study:
- To investigate the impact of SMT component pads on microstrip line signal integrity.
- To propose and analyze a novel high-frequency microstrip line structure for mitigating impedance discontinuities.
- To demonstrate effective characteristic impedance compensation techniques for improved signal transmission.
Main Methods:
- Introduction of stepped microstrip lines and characteristic impedance compensation techniques.
- Design and analysis of a six-layer printed circuit board (PCB) structure.
- Experimental validation using time-domain reflectometry and scattering parameter measurements.
Main Results:
- The proposed compensated microstrip line structure achieved an average impedance of 52.7 Ω, a 2.5% deviation from the reference.
- Compensation methods, including reference plane cut-outs, effectively adjusted impedance towards target values within a 10% tolerance.
- Significant improvements in impedance matching and transmission coefficients were observed.
Conclusions:
- The novel microstrip line structure and compensation techniques are effective in enhancing signal integrity.
- This research provides valuable insights for robust high-frequency microstrip transmission line design in advanced wireless systems.
- The findings contribute to the development of more reliable and higher-performing wireless communication technologies.
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