Electric field distributions in microwave planar circuits by small coaxial probe and comparison with FDTD method

Abstract

A detailed investigation of the two dimensional electric field distributions in bandpass filter elements that consist of microwave planar structures such as microstrip and coplanar waveguide is very useful for physical understanding, accurate and high-speed filter design and studies of electromagnetic coupling effects. By using a small electric coaxial probe, two dimensional electric field distributions for filter elements are measured. The proposed measurement system is very simple, wideband and accurate and is not required complicated system. Comparing the FDTD calculated results with measured results, the agreement is good. The upper limit of the operating frequency and the spatial resolution for the measurement system will be clarified.

Microwave microscopy applied to EMC problem: Visualisation of electromagnetic field in the vicinity of electronic circuit and effect of nanomaterial coating

“…The present work is focused on the frequency approach. To identify interferences within the circuit, it is possible to combine simulation and experimental approaches [4]. The existing simulation tools include several commercial solutions (HFSS , CST .…”

The Simulation, Design and Implementation of Bandpass Filters in Rectangular Waveguides

“…Microwaves filters were found to be necessary because a communication system can be used to separate the signals that would be needed for use. In several articles, researchers have studied the filters in waveguides, and the results of simulation programs are most interesting [1][2][3][4].…”

“…Each method has respective disadvantages and limitations for use in research and education. Some analysis methods for designing waveguide circuits are available in [1] to [8].…”

“…The problems with the design of filters often include a lack of equipment and tools used to design and build them. Numerical methods related to electromagnetic waves have caused a revolution in microwave engineering; techniques such as FDTD (Finite Differential Time Domain) [1], Smoothed Piecewise Linear model (SPEL) [2], TLM (Transmission Line Matrix) [3], and the Moment method [4] have been developed. Each method has respective disadvantages and limitations for use in research and education.…”

Wave Iterative Method for Electromagnetic Simulation

“…The problems with the design of circuits often include a lack of equipment and tools used to design and build them. Numerical methods related to electromagnetic waves have caused a revolution in microwave engineering; techniques such as FDTD (Finite Differential Time Domain) [1], TLM (Transmission Line Matrix) [2], and the Moment method [3] have been developed. Each method has respective disadvantages and limitations of usage foe both research and education.…”