·     In Media: News article in This Week, 2017 Aug 15.

·   2017 July: After two rounds of nominee eliminations, Karu has been selected as one of the two candidates in the ballot for 2019 President of the IEEE Antennas & Propagation Society (APS), the premier international learned society in antenna field, which has over 8,000 members worldwide and headquarters in the USA. In the 69-year history of this learned society, Karu is the first ever Australian academic selected for APS presidential ballot. During this 69 years, only three others from Asia and Pacific received this honour – one Australian and two Japanese. Two of them got elected including Dr Trevor Bird, former Chief Scientist of CSIRO and Adjunct Professor of Macquarie University.

·    2017 July: Hey! now there is a new method for optimisation of RF circuits, antennas, microwave components, electromagnetic structures, etc. Our paper entitled “Cross-Entropy Method for Electromagnetic Optimization with Constraints and Mixed Variables” has been accepted for IEEE Transactions on Antennas and Propagation, and is now available as a pre-print. It can do a lot of things current EM optimisers can’t do well, including handling mixed (discrete and continuous) variables and imposing constraints. For example, you can direct this optimiser to consider only commercially available values for some variables that are discrete (e.g. dielectric constant and thickness of substrates). You can optimise your device (i.e. all parts of the device) while ensuring that the total length of the device is exactly equal to a specified value.

· 2017 July: Our invited chapter on “Making UWB Antennas Unidirectional: Phase Coherence with an Ultra-Wide Band Frequency Selective Surface Reflector,” is available in the book entitled The World of Applied Electromagnetics in Appreciation of Magdy Fahmy Iskander, edited by Akhlesh Lakhtakia and Cynthia Furse, Springer (USA), 2017.

·  2017 July: This paper we published in IEEE Transactions on Antennas and Propagation shows how to achieve a record gain bandwidth product from a small antenna using resonant cavity antenna concept and particle swarm optimisation: 
Achieving a Large Gain-Bandwidth Product from a Compact Antenna.

·  2017 April: Your high-gain antenna is totally stationary. Yet you can steer its beam to any direction within a very large conical volume (apex angle > 100 degrees) without any electronics! Our innovative near-field phase transformation method with two rotating metasurfaces placed at a fraction of wavelength from a high-gain antenna has many advantages over current electronic or mechanical antenna beam steering methods. See our paper in IEEE Transactions on Antennas and Propagation for details: “Steering the Beam of Medium-to-High Gain Antennas Using Near-Field Phase Transformation”.

· 2016 December: Karu has been re-elected as the 2017 Chair of IEEE New South Wales (NSW) Section, which has approximately 2,000 IEEE members including approximately 50 IEEE Fellows. He will also represent NSW in IEEE Australia Council - the national body of IEEE, and will chair the IEEE NSW AP/MTT Chapter in 2017.

·   2016 July: Karu has also been selected as one of the three new Distinguished Lecturers of IEEE AP Society for 2017-2019. He is the only Australian AP Distinguished Lecturer (DL) in almost two decades, and second Australian AP DL ever.

· 2016 June: How do you steer the beam of a leaky-wave antenna without changing frequency and without changing bias voltages, i.e. using only two fixed DC bias voltages? Answer: by cascading reconfigurable binary unit cells to form multi-state macro cells. Details are in our paper in IEEE Transactions on Antennas and Propagation: “Fixed-Frequency Beam Steering of Microstrip Leaky-Wave Antennas using Binary Switches”.

·  2016 April: Leaky-wave antennas with dual side beams can have a wide bandwidth too. See our paper in IEEE Transactions on Antennas and Propagation for details: “Wideband Microstrip Leaky-Wave Antennas with Two Symmetrical Side Beams for Simultaneous Dual-Beam Scanning”.

·  2016 February: This paper we published in IEEE Transactions on Antennas and Propagation has set a new world record for the Gain-Bandwidth Product per Unit Area of any low-profile (< one-wavelength tall) high-gain antenna: “A class of extremely wideband resonant cavity antennas with large directivity-bandwidth products”.

·  2016 January: This paper in IEEE Transactions on Antennas and Propagation describes how phase correction of the aperture field of an aperture antenna can be done right at the aperture, using a thin printed metasurface placed at a fraction of a wavelength from the antenna top: “A low-profile printed planar phase correcting surface to improve directive radiation characteristics of electromagnetic band gap resonator antennas”.

·  2015 November: In a state-wide election held in November 2015, Professor Karu Esselle has been elected as 2016 Chair of IEEE New South Wales (NSW) Section. This Section, with about 2,000 members, oversees all IEEE activities in the state. This is the first time a Macquarie University academic has been elected to lead IEEE at state level. He will also represent NSW in IEEE Australia Council - the national body of IEEE, and will chair the IEEE NSW AP/MTT Chapter in 2016.

·  2014 November: Karu was elected to the IEEE AP Society Administrative Committee (AdCom) for a three-year term in 2014. He is said to be the only person residing in Asia and Pacific (IEEE Region 10) to be elected to this highly competitive position over a period of at least six years (2010-2015).

Contact Details

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(please inquire for visiting hours by email)

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School of Engineering
Faculty of Science and Engineering
Macquarie University, NSW 2109

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