Talks: Classical half-wave dipole antenna, GPS, HAARP & more
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Talks: (1) Some Further Thoughts and ideas concerning the classical half-wave diploe antenna (2) The State-of-the-Art in Antenna-based Techniques for Mitigating Threats to the Global Positioning System (GPS), (3) HAARPP
IEEE North Jersey Section AP/MTT, ED/CAS, Photonics Chapters, and SIGHT Co-sponsor the workshop and panel session with three Talks: (1) Some Further Thoughts and ideas concerning the classical half-wave diploe antenna (2) The State-of-the-Art in Antenna-based Techniques for Mitigating Threats to the Global Positioning System (GPS), (3) The High Frequency Active Auroral Research Program, “HAARP”, A Brief History and Engineering Review
Talk 1: Some Further Thoughts and ideas concerning the classical half-wave diploe antenna
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. Through his 1950 book Antennas, Professor John Kraus 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 that we will provide a simple interpolation method for adjustments. Lastly, we will present a new design method for constructing a half-wave dipole antenna independent of the conductor's diameter, whether wire or tubing.
Talk 2:The State-of-the-Art in Antenna-based Techniques for Mitigating Threats to the Global Positioning System (GPS)
Nearly every aspect of society relies on positioning, navigation, and timing (PNT) services from Global Navigation Satellite Systems (GNSS), such as 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 with low-cost hardware and open-source software is relatively easy, 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 to enhance 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.
Talk 3:The High Frequency Active Auroral Research Program, “HAARP”, A Brief History and Engineering Review
The HAARP Research Facility is a state-of-the-art ionospheric research project in Alaska and was jointly funded by the U.S. Air Force, U.S. Navy, and the Defense Advanced Research Projects Agency (DARPA). Designed and built by a Washington, DC based APTI/BAE Systems team, its purpose is to analyze the Earth’s ionosphere and investigate the potential for developing ionospheric enhancement technology for radio communications and surveillance, in addition to new Radar and Radio Communications research. The HAARP facility was built in three stages, starting in 1993, research operations began in 1996, and it was completed in 2007. In 2015, the HAARP program and all assets were officially transferred to the University of Alaska Fairbanks (UAF), and it continues to operate today. The most prominent instrument at the HAARP Research Station is the Ionospheric Research Instrument (IRI), a 180-antenna tower phased array, and 180 individual radio transmitter systems, operating in the high frequency (HF) band with an adequate radiated power of 5 Gigawatts. The HAARP IRI is recognized as one of the highest-powered HF transmitting systems in the world and is used to temporarily excite a limited area of the ionosphere for scientific study. Other instruments at the facility include VHF and UHF radars, a fluxgate magnetometer, a Digi-sonde (an ionosphere sounding device), an induction magnetometer, and low-light CCD camera optics systems, which are all used to study the physical processes that occur in the excited ionosphere region. The HAARP facility has a 15-megawatt diesel engine-based power generation plant and a modern operations center.
The HAARP program is recognized as a highly successful research project that has overcome many unique and unusual radio engineering design challenges. This presentation will provide an inside view describing how the HAARP systems were designed, constructed, installed, and operated, with emphasis on the unique engineering aspects of constructing this modern research facility. Examples of scientific research conducted at the facility will also be presented.
The HAARP program is recognized as a highly successful research project that has overcome many unique and unusual radio engineering design challenges. This presentation will provide an inside view describing how the HAARP systems were designed, constructed, installed, and operated, with emphasis on the unique engineering aspects of constructing this modern research facility. Examples of scientific research conducted at the facility will also be presented.
Date and Time
- Date: 20 May 2025
- Time: 04:30 PM EDT to 06:30 PM EDT
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Location
- 141 Warren St, New Jersey Institute of Technology
- The Lewis and Julia P. Kieman Conference Room
- Newark, New Jersey
- United States 07102
- Building: ECEC
- Room Number: 202
Hosts
- North Jersey Section Jt Chapter,AP03/MTT17
- North Jersey Section Jt Chapter,CAS04/ED15
- North Jersey Section Chapter,PHO36
- North Jersey Section SIGHT
- North Jersey Section Affinity Group,WIE
- Contact Event Hosts
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Dr. Ajay K. Poddar, email: akpoddar@ieee.org
Dr. Durga Misra, email: dmisra@njit.edu
Dr. Anisha Apte, email: anisha_apte@ieee.org
Dr. Nahresh Chand
Dr. Edip Niver
- Co-sponsored by IEEE North Jersey Section AP/MTT17, ED/CAS, and PHOTONICS Chapter
Registration
- Starts 04 April 2025 12:00 PM EDT
- Ends 20 May 2025 12:00 PM EDT
- No Admission Charge
Speakers
Prof. James K. Breakall of Penn State University
Topic:
Some Further Thoughts and ideas concerning the classical half-wave diploe antenna
Jack L. Burbank of Advanced Communications Technologies at Sabre Systems
Topic:
The State-of-the-Art in Antenna-based Techniques for Mitigating Threats to the Global Positioning System (GPS)
Steve Floyd
Topic:
The High Frequency Active Auroral Research Program, “HAARP”, A Brief History and Engineering Review
Agenda
4:15 PM - Refreshments and Networking
4:30 PM-6:30 PM: Talk by James K. Breakall, Penn State University, University Park, PA 16802. Jack L. Burbank is the Vice President for Advanced Communications at Sabre Systems, and Steve Floyd is the HAARP Chief Engineer and Principal Systems Engineer at Ultra Electronics.
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.
Co-sponsor by IEEE North Jersey Section
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