Free Webcast: RF and Microwave Filters


Bob Froelich

Enjoy the recording of our free webcast with Microwave Journal magazine on RF and Microwave Filters.

This webinar introduces the student to core filter concepts, parameters, and topologies.

  • Low Pass Filters with Lumped Elements
  • Using Filter Tables
  • Transformation to Band Pass
  • The Importance of Q
  • Impedance Inverter Concept
  • Coupled-Resonator Filters


Free Webcast: Introduction to Radar


Scott Bullock

A recording of instructor Scott Bullock's one hour webcast on Introduction to Radar is now available.

The following topics are covered:

  • Radar Detection and Ranging
  • Pulse vs Continuous wave with applications
  • Radar Modulation
  • Radar Path Budget - Basic Radar Equation
  • Radar Range Equation
  • Range Ambiguity and Mitigation
  • Maximum and Minimum Detectable Range
  • Plan Position Indicator – PPI and A-Scope

dBm to Milliwatts Conversion Tutorial with Python

I was recently updating one of the online workbooks for the RF Technology Certification program and decided to try and re-write one of the calculators using Python. The topic is teaching how to convert from dBm values to milliwatts without using a calculator, so the calculator does not just calculate the conversion, rather it tries to demonstrate the process of approximation in your head. In the end, I decided to keep the original Javascript calculator with some updates rather than replacing it with the Python version.

Transmission Line Elements on Smith Chart Web App

I've successfully added transmission line elements to the Smith Chart matching web app here on These include series, shorted shunt section, and open shunt section. There's a trick you can use to have these transmission line elements use an arbitrary characteristic impedance. The elements adopt the same characteristic impedance as the chart normalization impedance (default is 50 Ohms).

Femtocells: Design & Application


Joe Boccuzzi

This in-depth resource provides comprehensive coverage of femtocells and how they integrate with existing 3G and emerging wireless protocols and standards. Femtocells: Design & Application provides a technical roadmap for migrating to femtocell technology, covering network architecture, media protocols, system performance, and security issues. Detailed architectural diagrams illustrate various deployment options. This is a practical guide to the pioneering technology that enables extended indoor service coverage.

Analytical Impedance Match with Python

I created a quick Python function to calculate the component values for an impedance match between two real (resistive) terminations using the technique taught in the Introduction to Impedance Matching course. Here is what the code ends up looking like, and it shows how useful Python can be for working as a "quick programmable calculator." In the old days, I might have been tempted to program my old HP48 calculator to crank out the same values. It only took a few minutes to put the code together, which is the beauty of working with Python.

Free Webcast: What Will 5G Be?


Joe Boccuzzi

This webinar will provide an overview of areas 5G will address. We will begin with a sdiscussion on the shortcomings of present day cellular systems to highlight the items needing to be addressed in 5G. Provide the overall 5G goals and pillar use cases as defined by ITU. Several deployment options will be provided and summary of the 3GPP scenarios provided. Key system parameters will be discussed and the impact of 5G to a Cloud-RAN network architecture will be highlighted.

Smith Chart Matching HTML 5 Version

An early version of the Smith Chart web app is now available to try out. There are a couple of issues that I will be working on initially, such as the frequency entry dialog box appears to be transparent for some reason. I'll also be working on the layout to try and make the various parts of the app fit better on the page. At the moment, the app is only optimized for mouse input and does not respond to touch-based dragging events (to move elements around on the chart).

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