Category: Electromagnetic

Matching network design

DVB Antenna Design and Matching with Antenna Magus, Optenni Lab and FEKO

An antenna is designed for VHF and UHF DVB operation using Antenna Magus, a matching network is designed in Optenni Lab and the full combination simulated in FEKO. Television broadcasts are moving to digital formats all over the globe, with … Read More

3D total gain patterns

Time Analysis of UWB Antennas

An elliptical patch antenna is simulated to illustrate how FEKO can be applied to investigate time domain characteristics of UWB antennas including the fidelity, a measure of how similar the radiated waveform is to the excitation signal. Ultra-wideband (UWB) antennas … Read More

SRR filter prototype

Compact Triple-Band Filter Using Multiple Split-Ring Resonators

A novel design for a compact triple-band filter using multiple split ring resonators is simulated and compared to measurements. Planar Green functions are an ideal solution method for the analysis of microstrip networks.   The Method of Moments (MoM) formulation that … Read More

Ray Launching Geometrical Optics for Scattering Analysis

Introduction The analysis of the scattering properties of electrically large objects has always been a challenging problem. For highly accurate solutions to such problems the premier method is full‐wave analysis with the MoM or MLFMM (as available in FEKO). For … Read More

Understanding Grating Lobes in the Context of Periodic Boundary Conditions

Simple equations are presented to help understand the appearance of grating lobes in connection with PBC simulations in FEKO. The purpose of this article is to discuss grating lobes in connection with periodic boundary conditions (PBC) in FEKO. Simple equations … Read More

UWB-filter at 7GHz

Ultra-Wideband Bandpass Filters with Hybrid Microstrip Slotline Structures

Li and Zhu [1] experimented with various microstrip structures to realize ultra-wideband (UWB) filters.  These structures typically include microstrip lines that couple with slots in a metallic ground plane, such as the one showed here. Dimensions s and t were varied experimentally to optimize … Read More

Radiation Hazard Investigation for Multiple Simultaneous Transmitters

Introduction Radiation hazards have to be within standardised limits for many different hazard applications, e.g. human safety (HERP), fuel (HERF) and ordnance (HERO). Most radiation safety standards define maximum limits for field strength in frequency bands and form an equivalent … Read More