Jean Paul Santos, Prof. Rahmat-Samii, and I were invited to write a feature article for a news featured on an online news organization sourced from the academic and research community, The Conversation. Through a collaboration with JPL engineers, we were able to prototype a 4×4 subarray antenna with excellent measured results, potentially allowing its use for the upcoming Mars2020 mission. This was a great opportunity to publicize our work, considering that The Conversation website has an annual...
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Author: Joshua Kovitz
Conference Paper on CP Antennas using CRLH
The annual IEEE International Symposium on Antennas and Propagation (IEEE APS) conference was held in Vancouver, BC, Canada for the year 2015. While I was excited about travelling to an awesome city with great latte's, I was even more excited about presenting some of my recent work on CP antenna designs. The grand challenge inherent to CP antennas is to satisfy two performance requirements simultaneously. Antenna engineers describe these performance parameters as impedance matching and axial...
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Normalized Plane Wave Spectra: Quantification of Measured Near-Field Distributions for the ISS-RapidScat using Measured Far-field Patterns
Y. Rahmat-Samii, J.M. Kovitz and L.R. Amaro, "Normalized Plane Wave Spectra: Quantification of Measured Near-Field Distributions for the ISS-RapidScat using Measured Far-field Patterns," in Proceedings of the IEEE Antenna and Propagation Society International Symposium, pp. 1702 - 1703, July 2015.
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The CP Half E-shaped patch: Evolving from linear polarization to compact single feed circularly polarized antennas
J.M.Kovitz, J.P.Santos and Y.Rahmat-Samii, "The CP Half E-shaped patch: Evolving from linear polarization to compact single feed circularly polarized antennas," in Proceedings of the IEEE Antenna and Propagation Society International Symposium, pp. 1918 - 1919, July 2015.
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Dispersion engineered right/left-handed transmission lines enabling near-octave bandwidths for wideband CP patch arrays
J.M.Kovitz, Y.Rahmat-Samii and J.Choi, "Dispersion engineered right/left-handed transmission lines enabling near-octave bandwidths for wideband CP patch arrays," in Proceedings of the IEEE Antenna and Propagation Society International Symposium, pp. 2525 - 2526, July 2015.
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Design and Implementation of Broadband MEMS RHCP/LHCP Reconfigurable Arrays Using Rotated E-Shaped Patch Elements
J.M. Kovitz, H. Rajagopalan and Y. Rahmat-Samii, "Design and Implementation of Broadband MEMS RHCP/LHCP Reconfigurable Arrays Using Rotated E-Shaped Patch Elements," IEEE Transactions on Antennas and Propagation, vol. 63, no. 6, pp. 2497 - 2507, June 2015.
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New Journal Paper on CP MEMS Reconfigurable Arrays
I am excited to announce my latest journal paper entitled "Design and Implementation of Broadband MEMS RHCP/LHCP Reconfigurable Arrays Using Rotated E-Shaped Patch Elements" with co-authors Harish Rajagopalan and Yahya Rahmat-Samii. This paper describes our development of a wideband antenna design that can switch between right-handed and left-handed circular polarization states, increasing the antenna flexibility for remote terminal applications. Our design used the E-shaped patch antenna t...
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Book Chapter on Spectral Theory Now Available
Over the last year, I have been collaborating with Prof. Rahmat-Samii on a project with JPL related to the characterization of radiation in the near field zone of large antennas, such as reflector dish antennas. Our goal was to quantify the absolute magnitudes of the electric field distributions in their respective V/m values. Our approach relies on the spectral theory of radiation, which has often been termed the Plane Wave Expansion technique. The beauty of this approach is that one can relate...
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Novelties of Spectral Domain Analysis in Antenna Characterizations: Concept, Formulation, and Applications
Joshua M. Kovitz and Yahya Rahmat-Samii, "Novelties of Spectral Domain Analysis in Antenna Characterizations: Concept, Formulation, and Applications," in Advanced Computational Electromagnetics Methods and Applications, pp.1-82, Artech House, 2015.
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Enhancing the Power Capabilities of the Stepped Septum Using an Optimized Smooth Sigmoid Profile
I. Kim, J. M. Kovitz, and Y. Rahmat-Samii, "Enhancing the Power Capabilities of the Stepped Septum Using an Optimized Smooth Sigmoid Profile," IEEE Antennas and Propagation Magazine, vol. 56, no. 5, pp. 16-42, October 2014.
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