Category: Electromagnetic

Microstrip-Fed Slot Antenna

A microstrip-fed slot antenna was designed using Antenna Magus for the following specifications: 5 GHz centre frequency 50 Ω input impedance FR4 substrate, ε = 4.35, height = 1.5mm Dimensions of the slot and feed-line are: Ws = 743.3 μm … Read More

Excalibur tag antenna

Electromagnetic Modelling of UHF RFID Systems

An overview of UHF RFID system EM modeling, including tag antenna in isolation, tag antenna placement and reader antenna operating environment. Introduction The use of radio frequency identification (RFID) solutions is becoming ever more widespread. From simply tagging retail items … Read More

Diplexer schematic in FEST3D

Waveguide Diplexer Design with FEKO, FEST3D and SPARK3D

A waveguide diplexer is designed using the interface between FEKO and FEST3D. A part of the design is modelled in FEKO and the obtained generalised scattering matrix is used as a component in the FEST3D model. A multipactor analysis is … Read More

Singly-Fed Circularly Polarized Electromagnetically Coupled Patch Antenna

A description of the FEKO model for an antenna presented at the ACES 2007 conference. Model Description Hajiaboli and Popovic presented a paper on a novel circularly polarized patch structure at the ACES 2007 conference, [1]. The antenna consists of … Read More

Solving a Patch Antenna with the FEM

The FEM current source and complex load for the FEM region enables the setting of an excitation inside a FEM dielectric region and to calculate S-parameters. This load is set at an arbitrary position inside the FEM mesh, i.e. it … Read More

OMNI_topview Lead Image

Isosurfaces for Near-Field Characterisation of Transmitter ICNIRP Boundaries

A description of how isosurfaces may be used to evaluate radiation hazard safety boundaries around transmitter structures against ICNIRP guidelines. Physical Problem In this example a large truss structure is used to support omnidirectional GSM antennas and Yagi-Uda antennas at … Read More

Wide-Band Stacked Annular-Ring Dielectric Resonator Antenna

A wide-band stacked annular-ring dielectric resonator antenna is modelled efficiently with the FEM/MOM and 2 planes of magnetic symmetry. Introduction: The FEM/MoM is often overlooked as an efficient technique for modelling dielectrics. This is even more true when the model consists of more than one dielectric layer. The traditional … Read More