A resonant dipole antenna for testing immunity of equipment to intentional electromagnetic interference (IEMI) is described, along with simulated and measured test results which are in good agreement and demonstrate the high voltage operation

Bale, Simon

Dawson, John F.

Dawson, Linda

Hoad, Richard

Hough, Mark

Marvin, Andy

Petit, Barney

Porter, Stuart

Rees, Tim

Robinson, Martin

Will, Iain

White Rose Research Online

This is a repository copy of A 1.3 GHz, High Voltage Mesoband Dipole Antenna for IEMI Testing.White Rose Research Online URL for this paper:https://eprints.whiterose.ac.uk/173672/Version: Accepted VersionProceedings Paper:Dawson, John F. orcid.org/0000-0003-4537-9977, Rees, Tim, Petit, Barney et al. (8 more authors) (Accepted: 2021) A 1.3 GHz, High Voltage Mesoband Dipole Antenna for IEMI Testing. In: Joint IEEE International Symposium on Electromagnetic Compatibility, Signal Power Integrity and EMC Europe. . (In Press) eprints@whiterose.ac.ukhttps://eprints.whiterose.ac.uk/Reuse Items deposited in White Rose Research Online are protected by copyright, with all rights reserved unless indicated otherwise. They may be downloaded and/or printed for private study, or other acts as permitted by national copyright laws. The publisher or other rights holders may allow further reproduction and re-use of the full text version. This is indicated by the licence information on the White Rose Research Online record for the item. Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. A 1.3 GHz, High Voltage Mesoband Dipole Antenna for IEMI Testing John F. Dawson1, Tim Rees2, Barney Petit2, Richard Hoad2, Simon Bale1, Mark Hough1, Linda Dawson1, Martin Robinson1,  Andy Marvin1, Iain Will1, and S J Porter1 1Department of Electronic Engineering, University of York, York, UK, email: john.dawson@york.ac.uk 2 QinetiQ, Farnborough, UK, email: BJPETIT@qinetiq.com  Abstract— A resonant dipole antenna for testing immunity of equipment to intentional electromagnetic interference (IEMI) is described, along with simulated and measured test results which are in good agreement and demonstrate the high voltage operation. I. INTRODUCTION In this paper we present the design simulation and measurement of a high voltage dipole antenna which provides a damped sinusoidal pulsed fields working with a pulsed source. The antenna is intended to work with a single pulse generator [1] having a double exponential waveform with a rise-time of 90 ps a FWHH of 2.5 ns and an output amplitude of up to 34 kV. II. ANTENNA DESIGN Optimisation of the antenna was carried out using the CST Microwave studio time domain solver.  Fig. 1. 1.3 GHz dipole under test in QinetiQ’s anechoic chamber  Fig. 2. View of simulation CAD model with enclosure lid removed As the case size was comparable to the dipole it was decided to use a reflector to control the interaction of the case and antenna (Fig. 1). A compact transition from the modified high voltage 7-16 connector was manufactured using a polypropylene insulator and an aluminium taper to feed a FR4 circuit board based matching network, ferrite bead balun, low-pass filter, and antenna (Fig. 2). III. RESULTS AND CONCLUSIONS Measurements of the antenna performance were carried out in QinetiQ’s Anechoic chamber using both a Vector network analyser (VNA) and a high voltage pulse source with D-dot sensor and 20 Gsample/s sampling oscilloscope.  Fig. 3. Comparing Hyperband antenna numerical model results with VNA and pulse measurement Fig. 3 shows the received pulse scaled to 1 V excitation and 1 m distance. For the frequency domain measurement (VNA V) with a VNA the pulse response is obtained from the inverse FFT of the transmission measurement convolved with the expected source pulse. Two measurements are shown with the pulse generator set to 6 kV with the antenna in vertical and horizontal polarisations. In all cases the measurements are adjusted for D-dot sensor cable and cable losses, the pulses are offset in time to allow the initial peak to be clearly seen. The lower amplitude of measured with the pulse generator may be due to the pulse shape and amplitude differing from the ideal assumed in the model and VNA results. Overall the antenna performs as predicted during the design phase with slightly reduce field levels. The reflector provides increased field level compared with a simple dipole.  REFERENCES [1] R. Hoad, L. Chatt, B. Petit, T. Rees, and G. Eastwood, “Mesoband and Hyperband Immunity Test Generator and Standards,” in AMEREM, 2018. Take-Home Messages:   A high voltage pulse driven 1.3G Hz Mesoband dipole  Robust simple to build antenna for IEMI testing  Operates from external Broadband pulse generator  Simple high voltage balun and low pass filter  Computational model matches measured results © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.2021 Joint IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC Europe

A 1.3 GHz, High Voltage Mesoband Dipole Antenna for IEMI Testing

https://eprints.whiterose.ac.uk/173672/1/Mesoband_1G3Hz_Ant_EMC2021_V06_postprint.pdf

A 1.3 GHz, High Voltage Mesoband Dipole Antenna for IEMI Testing

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