Stepped-Impedance LPF Takes New Approach

Sept. 21, 2010
In stepped-impedance lowpass filters (SI-LPFs), electrically short high- and low-impedance sections are cascaded to approximate the corresponding ladder LC lumped-circuit prototype. Typically, such filters are designed using charts and tables. ...

In stepped-impedance lowpass filters (SI-LPFs), electrically short high- and low-impedance sections are cascaded to approximate the corresponding ladder LC lumped-circuit prototype. Typically, such filters are designed using charts and tables. Hany Taher, who hails from Saudi Arabia's Umm Elqura University and Egypt's Electronics Research Institute, instead uses an artificial neural network (ANN) to learn the highly nonlinear relationship between the design specifications and physical dimensions of the microstrip SI-LPF.

This ANN was constructed by learning from a set of input/output data. After training, the ANN can generalize the relationship between the input and output. Essentially, ANN models were built to relate the physical dimensions of the target design to the design specificationswithout using any charts or tables. Using this technique, designers gain a fast and accurate computer-aided-design (CAD) tool to design a microstrip SI-LPF. See "A New Artificial Intelligent Technique for Designing of Microstrip Stepped Impedance Low-Pass Filter," Microwave And Optical Technology Letters, September 2010, p. 1946.

Sponsored Recommendations

What is a Vector Network Analyzer?

Feb. 19, 2024
For engineers that are outside of the RF and Microwave industry and work in industries like the healthcare and medical fields, food and beverage, agriculture, and beyond, a vector...

Time Domain Gating Measurements with a VNA Webinar

Feb. 19, 2024
Time domain gating is a very useful tool in vector network analysis. If a measurement can be made over sufficient bandwidth, there will be ample resolution in the time domain ...

Webinar: Introduction to OTA Measurement for mmWave and Sub-THz

Feb. 19, 2024
Join Jeanmarc Laurent, a leading expert from MilliBox, for an exclusive live webinar showcasing a complete Over-the-Air (OTA) testing system setup. In this immersive session, ...

Using a CMT VNA with Socket Server

Feb. 19, 2024
This application note describes use of a software application CMT Socket Server which is distributed and supported by Aphena Ltd. Please email [email protected] regarding purchase...