Planar Transmission Lines for MIC — Lesson 1

This lesson covers the introduction to microwave integrated circuits (MICs) and their various forms. It delves into the integration of different circuits to realize a system, the use of planar transmission lines for MICs, and the role of lumped elements in MIC fabrication. The lesson also explores the two basic forms of MICs: hybrid and monolithic. It further discusses various types of planar transmission lines such as stripline, microstrip line, inverted microstrip line, slot line, coplanar waveguide, and fin line. The lesson concludes with an overview of lumped elements used in MICs and the methodologies adopted in their fabrication. For instance, it explains how a stripline's characteristic impedance can be calculated when the conductor thickness is finite.

Video Highlights

00:28 - Introduction and outline
05:56 - Planar transmission lines and their types
08:47 - Structure and characteristics of stripline
17:49 - Characteristic impedance for a finite conductor thickness
23:33 - Structure and characteristics of microstrip line
34:13 - Suspended and inverted microstrip line, slot line, coplanar line
40:20 - Coupled transmission lines and their characteristics
47:05 - Coupled line theory
51:35 - Even mode excitation and conclusion

Key Takeaways

- Microwave integrated circuits (MICs) are created by integrating different circuits to realize a system.
- Planar transmission lines are commonly used in MICs due to their suitability for integration.
- Lumped elements, such as resistors, capacitors, and inductors, play a crucial role in MIC fabrication.
- Hybrid and monolithic are the two basic forms of MICs.
- Various types of planar transmission lines, including stripline, microstrip line, inverted microstrip line, slot line, coplanar waveguide, and fin line, offer different degrees of flexibility in circuit realization.
- The characteristic impedance of a stripline can be calculated considering the conductor thickness.