Design of a TEM-Cell with Increased Usable Test Area

Transversal electromagnetic mode cells (TEM-cells) are used for electromagnetic compatibility measurements (emission and immunity), and for biomedical applications. Over the years, higher and higher frequencies are being used, which demands smaller transmission structures in order to obtain the homogeneous field distribution due to resonance. Such resonance destroys the TEM field, introducing higher order modes. The goal was to design the TEM-cell for GSM frequencies that will have a larger area with a homogeneous field used for testing, while still obtaining the characteristic impedance. Commercial TEM-cells used for frequencies of 900 MHz have only 2 cm in height available for testing, while the proposed TEM-cell has 5 cm in vertical dimension suitable for EMC testing. The problems regarding characteristic impedance, resonance, higher order modes, dimensions and usable test area are discussed. Numerical modeling with the ``Quickfield", which uses finite element method (FEM), and ``MAFIA", which uses finite integration technique (FIT) gave the electromagnetic field distribution and calculation of the higher order modes. The measurements of VSWR and insertion loss showed good correlation with the model. At 935 MHz, the VSWR is 1.1 which makes the cell applicable for GSM frequencies. The higher order modes appear at 490 MHz and 740 MHz, but another frequency area is usable. The TEM-cell has a characteristic impedance of 75 W and an increased usable test area. It can be utilized for EMC measurements and biomedical applications from DC to 1 GHz.

Design of a TEM-Cell with Increased Usable Test Area

Transversal electromagnetic mode cells (TEM-cells) are used for electromagnetic compatibility measurements (emission and immunity), and for biomedical applications. Over the years, higher and higher frequencies are being used, which demands smaller transmission structures in order to obtain the homogeneous field distribution due to resonance. Such resonance destroys the TEM field, introducing higher order modes. The goal was to design the TEM-cell for GSM frequencies that will have a larger area with a homogeneous field used for testing, while still obtaining the characteristic impedance. Commercial TEM-cells used for frequencies of 900 MHz have only 2 cm in height available for testing, while the proposed TEM-cell has 5 cm in vertical dimension suitable for EMC testing. The problems regarding characteristic impedance, resonance, higher order modes, dimensions and usable test area are discussed. Numerical modeling with the ``Quickfield", which uses finite element method (FEM), and ``MAFIA", which uses finite integration technique (FIT) gave the electromagnetic field distribution and calculation of the higher order modes. The measurements of VSWR and insertion loss showed good correlation with the model. At 935 MHz, the VSWR is 1.1 which makes the cell applicable for GSM frequencies. The higher order modes appear at 490 MHz and 740 MHz, but another frequency area is usable. The TEM-cell has a characteristic impedance of 75 W and an increased usable test area. It can be utilized for EMC measurements and biomedical applications from DC to 1 GHz.

Kaynak Göster

Bibtex @ { tbtkelektrik144567, journal = {Turkish Journal of Electrical Engineering and Computer Science}, issn = {1300-0632}, eissn = {1303-6203}, address = {}, publisher = {TÜBİTAK}, year = {2003}, volume = {11}, pages = {143 - 154}, doi = {}, title = {Design of a TEM-Cell with Increased Usable Test Area}, key = {cite}, author = {Malarıc, Kresimir and Bartolıc, Juraj} }
APA Malarıc, K , Bartolıc, J . (2003). Design of a TEM-Cell with Increased Usable Test Area . Turkish Journal of Electrical Engineering and Computer Science , 11 (2) , 143-154 .
MLA Malarıc, K , Bartolıc, J . "Design of a TEM-Cell with Increased Usable Test Area" . Turkish Journal of Electrical Engineering and Computer Science 11 (2003 ): 143-154 <
Chicago Malarıc, K , Bartolıc, J . "Design of a TEM-Cell with Increased Usable Test Area". Turkish Journal of Electrical Engineering and Computer Science 11 (2003 ): 143-154
RIS TY - JOUR T1 - Design of a TEM-Cell with Increased Usable Test Area AU - Kresimir Malarıc , Juraj Bartolıc Y1 - 2003 PY - 2003 N1 - DO - T2 - Turkish Journal of Electrical Engineering and Computer Science JF - Journal JO - JOR SP - 143 EP - 154 VL - 11 IS - 2 SN - 1300-0632-1303-6203 M3 - UR - Y2 - 2021 ER -
EndNote %0 Turkish Journal of Electrical Engineering and Computer Science Design of a TEM-Cell with Increased Usable Test Area %A Kresimir Malarıc , Juraj Bartolıc %T Design of a TEM-Cell with Increased Usable Test Area %D 2003 %J Turkish Journal of Electrical Engineering and Computer Science %P 1300-0632-1303-6203 %V 11 %N 2 %R %U
ISNAD Malarıc, Kresimir , Bartolıc, Juraj . "Design of a TEM-Cell with Increased Usable Test Area". Turkish Journal of Electrical Engineering and Computer Science 11 / 2 (Şubat 2003): 143-154 .
AMA Malarıc K , Bartolıc J . Design of a TEM-Cell with Increased Usable Test Area. Turkish Journal of Electrical Engineering and Computer Science. 2003; 11(2): 143-154.
Vancouver Malarıc K , Bartolıc J . Design of a TEM-Cell with Increased Usable Test Area. Turkish Journal of Electrical Engineering and Computer Science. 2003; 11(2): 143-154.
IEEE K. Malarıc ve J. Bartolıc , "Design of a TEM-Cell with Increased Usable Test Area", Turkish Journal of Electrical Engineering and Computer Science, c. 11, sayı. 2, ss. 143-154, Şub. 2003