Talk 1 The half-wave dipole is a widely used antenna in Amateur Radio and other communications. It is often one of the first antennas studied in college courses. Professor R.W.P. King dedicated over 100 years to studying dipoles, and his accurate measurements continue to validate modeling software. Professor John Kraus, through his 1950 book Antennas, inspired many in the field, including the speaker. This presentation will explore key topics related to the half-wave dipole. First, we will assess the accuracy of various antenna modeling codes, using a unique surface model in FEKO as a reference dipole compared to wire Method of Moments (MoM) methods. We will also review the famous formula 468/f, which calculates the length of a half-wave dipole in feet (where f is in MHz), and discuss its effectiveness and common misconceptions. It does not reliably tune all antennas to resonance for different wire or tubing diameters, so we will provide a simple interpolation method for adjustments. Lastly, we will present a new design method for constructing a half-wave dipole antenna that is independent of the conductor's diameter, whether wire or tubing. Talk 2 Nearly every aspect of society relies on Positioning, Navigation, and Timing (PNT) services from Global Navigation Satellite Systems (GNSS) like the Global Positioning System (GPS). However, GPS signals are vulnerable to spoofing and jamming due to their unauthenticated nature and weak signal strength at the Earth's surface. Implementing such attacks is relatively easy with low-cost hardware and open-source software, leaving many regions susceptible to these threats. Research over the past few decades has focused on improving PNT performance amid jamming and spoofing, typically categorized into five main approaches: 1) signal processing methods, 2) antenna-based methods, 3) artificial intelligence (AI) techniques, 4) non-GNSS sensors, and 5) hybrid methods combining various strategies. This presentation will provide an overview of GPS and GNSS technologies, common attack strategies, and various mitigation methods, primarily focusing on antenna-based techniques. It will introduce a taxonomy of these techniques aimed at enhancing signal reception by maximizing authentic GPS signals and minimizing those from attackers. The presentation will highlight well-known techniques and ongoing research and discuss key research gaps and future directions. Co-sponsored by: IEEE North Jersey Section AP/MTT17, ED/CAS, and PHOTONICS Chapter Speaker(s): Prof. James K. Breakall, Jack L. Burbank Agenda: 4:150 PM - Refreshments and Networking 4:30 PM-6:30 PM: Talk by Prof. James K. Breakall, Penn State University, University Park, PA 16802 and You do not have to be an IEEE Member to attend. Refreshments are free for all attendees. Please invite your friends and colleagues to take advantage of these Invited Lectures. Room: 202, Bldg: ECEC, 141 Warren St, New Jersey Institute of Technology, The Lewis and Julia P. Kieman Conference Room, Newark, New Jersey, United States, 07102
