Parallel plate transmission line transformer

S.J. Voeten, G.J.H. Brussaard, A.J.M. Pemen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)


A Transmission Line Transformer (TLT) can be used to transform high-voltage nanosecond pulses. These transformers rely on the fact that the length of the pulse is shorter than the transmission lines used. This allows connecting the transmission lines in parallel at the input and in series at the output. In the ideal case such structures achieve a voltage gain which equals the number of transmission lines used. To achieve maximum efficiency, mismatch and secondary modes must be suppressed. Here we describe a TLT based on parallel plate transmission lines. The chosen geometry results in a high efficiency, due to good matching and minimized secondary modes. A second advantage of this design is that the electric field strength between the conductors is the same throughout the entire TLT. This makes the design suitable for high voltage applications. To investigate the concept of this TLT design, measurements are done on two different TLT designs. One TLT consists of 4 transmission lines, while the other one has 8 lines. Both designs are constructed of DiBond™. This material consists of a flat polyethylene inner core with an aluminum sheet on both sides. Both TLT's have an input impedance of 3.125 O. Their output impedances are 50 and 200 O, respectively. The measurements show that, on a matched load, this structure achieves a voltage gain factor of 3.9 when using 4 transmission lines and 7.9 when using 8 lines.
Original languageEnglish
Title of host publicationProceedings of the 2011 IEEE Pulsed Power Conference, 19-23 June 2011, Chicago, Illinois
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Publication statusPublished - 2011
Event18th IEEE International Pulsed Power Conference, PPC 2011 - Chicago, United States
Duration: 19 Jun 201123 Jun 2011
Conference number: 18


Conference18th IEEE International Pulsed Power Conference, PPC 2011
Abbreviated titlePPC 2011
Country/TerritoryUnited States


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