At high mmWave frequencies, all antenna features are smaller than ever before. This means that the RF base material for antenna printed circuit boards (PCBs) have to have tighter tolerances at the lowest loss. Different PCB solutions require different RF laminates: hybrid multilayers (RF laminate + FR4), all-RF multilayers, and double-sided PCBs. From electrical and mechanical reliability points of view, ceramic filled PTFE based materials provide a leading edge over thermoset resin system base materials. The high consistency of dielectric constant and loss factor of the thermoplastic material PTFE over the required operating temperature range at the resonance frequency of the antennas has been recognized by the RF and microwave industry for a long time. This technical presentation discusses the main reasons why such types of base materials are being used. All-RF multilayers are the main PCB type for phased array radar PCBs. There, the thin RF laminate must also show a very high dimensional stability in order to get combined with a suitable lowest loss prepreg, which is provided by an engineered selection of suitable glass fabrics. Hybrid multilayer PCBs are widely used for 77/79 GHz automotive radar PCBs. Tested electrical and reliability data confirm that very thin ceramic-filled non-reinforced PTFE laminates are most suitable in order to meet the requirements of next-generation ADAS sensors. Double-sided PCBs for mmWave systems usually consist of relatively thin (10 mil / 0.25 mm) thick laminates. There, the combination of PTFE resin, woven glass fabric, ceramic filler systems and ultra-low profile copper foil provides the lowest loss at the highest dimensional stability. The market introduction of an ultra-low profile ED copper foil provides an even improved insertion loss over rolled annealed copper foil, in addition to its lower cost. The higher the frequency, the better the value. Only PTFE laminates result in high enough copper peel strength even at repeated rework cycles. Almost all PCB manufacturers capable of making mmWave PCBs have processing experience of PTFE laminates; and several of these also use PTFE laminates together with the lowest loss RF prepregs. Speaker Manfred Huschka Dipl.-Ing. Manfred Huschka spent his entire professional career in the printed circuit board industry: After graduation, he was manufacturing printed circuit boards (Braun Ireland Ltd). Thereafter manufacturing FR4 base materials (AlliedSignal Laminate Systems), with his final position being Director Technology Europe. From mid-1997 until mid-2019 Manfred was with Taconic Advanced Dielectric Division. In those more than 20 years he was in charge of the Irish PTFE base material manufacturing plant for 10 years and was Vice President Global Sales for more than 10 years. Following the acquisition of Taconic ADD by AGC Manfred is now Vice President Global Marketing Coordination. Manfred is the author of several printed circuit board technology books including A comprehensive guide to the design and manufacture of printed board assemblies, Multilayer bonding guide, and Pocket dictionary PCB technology. He is also an author and presenter at many international conferences. Email: [email protected] Address: AGC Multi-Materials General Division, Ireland Registration https://events.vtools.ieee.org/m/278272  The Zoom link will be sent one day beforehand.   The event is co-organised by Australian IEEE AP-MTT Chapters.  For further details, please contact Fatemeh Babaeian ([email protected]).  

Imagine one day you could access the Internet from anywhere on Earth! Can we do that?  Satellites are envisioned to provide the ultimate flexibility in complementing the next generation terrestrial networks. Whether it is the need for higher bandwidth, lower latency, or global connectivity, dense satellite networks are gradually becoming a viable engineering and business solution to addressing these demands. This seminar will skim through some of the key advances in this field and explore the challenges and research opportunities for connecting Internet-of-Things devices using satellite networks. It will also provide an overview of the recently completed largest open IoT network built in Victoria where RMIT provided the key expertise for creating this network along with 5 Victorian councils. Looking forward to talking to you in this seminar!  Biography Dr Akram Al-Hourani, Is a Senior Lecturer and Telecommunication Program Manager at the School of Engineering, RMIT University. Prior to joining academia, Dr Al-Hourani had extensively worked in the ICT industry, the total value of industry projects directed by Dr Al-Hourani exceeded $190M. Dr Al-Hourani has extensive industry/government engagement as a chief investigator in multiple research projects related to IoT, Smart Cities, Satellite / Wireless Communications. As a Lead Chief Investigator, he provided key expertise in delivering the largest open IoT network in Victoria in collaboration with 5 local governments “Northern Melbourne Smart Cities Network”, this project attracted two prestigious industry awards from the Municipal Association of Victoria (MAV) "Technology Awards for Excellence 2020", and the IoT Alliance Australia (IoTAA) "Smart Cities Award for 2020". His current research domains include the applications of UAV communication systems, stochastic geometry, radars, and the Internet-of-Things over satellite.   For more information, please see the link: https://www.akramalhourani.net/  Email: [email protected] Registration: https://events.vtools.ieee.org/m/277731

Zoom Link:  https://deakin.zoom.us/j/81684191734?pwd=UjNRNVNBaG9jZjdEQUl2NG1JMGtWdz09 Contact: IEEE PES Victorian chapter– [email protected] Speaker: Professor Junwei Lu, Griffith University, Australia) The Harmonic Balance Method (HBM) is mainly used for studying nonlinear system oscillations in aeronautical and mechanical engineering. The main advantages of this approximate analysis method are that it can be computationally very efficient and that it often gives accurate results along with useful insights into system behaviour. In electrical engineering, HBM has not been widely used and the very limited application was the Microwave circuit in 1980’s. The HBM has been successfully adopted to analyse nonlinear electromagnetic field and design electrical machines by Prof. Yamada Sotoshi and Prof. Junwei Lu in Japan in the late 1980’s, and to solve harmonics problem caused by DC-biased transformer in HVDC power system with Prof. Lu and his former PhD student (Prof. Xiaojun Zhao) in later 2000’s. However, such accurate HBM has not been effectively used to analyse and calculate harmonics caused by half-cycle saturation of the DC-biased transformer during GDM/GIC events and non-linear inductive loads and power electronics in distributed energy system. The study of these harmonics problems is normally focused on the electrical circuit level, the harmonic problem in the component and structure level (or electromagnetic fields) and power system level has not been fully investigated due to a lack of understanding of the characteristics of non-linear electromagnetic fields, and a lack of theory and methodology dealing with harmonics generated from non-linear electromagnetic fields and power electronics. In this seminar, the HBM for modelling and analysis of DC-biased power transformers including nonlinear magnetic field and Microgrid and distributed energy system (DES) will be introduced. The HBM can calculate all forms of harmonics generated from nonlinear inductive loads, saturated transformers and power electronics; therefore it can provide accurate prediction of harmonic distribution in electric power and renewable energy systems. This seminar intends to provide a detailed concept of HBM and its application in calculating the harmonics caused by non-linear inductive loads, half-cycle saturation of the DC-biased power transformers in HVDC power system and HV power system during GDM/GIC events, and power electronic devices in electric power and renewable energy systems. Registration: https://www.eventbrite.com.au/e/harmonic-analysis-in-power-systems-using-harmonic-balance-method-tickets-161194999583