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Journal Papers

2009

7. P. Izdebski, H. Rajagopalan, and Y. Rahmat-Samii, “Conformal Ingestible Capsule Antenna: A Novel Chandelier Meandered Design,” IEEE Transactions on Antennas and Propagation (Special Issue on Body-Centric Antennas), Vol. 57, n 4, pp. 900–909, April 2009.

2008

6. H. Rajagopalan, Y. Rahmat-Samii, and W. A. Imbriale, “RF MEMS Actuated Reconfigurable Reflectarray Patch-Slot Element,” IEEE Transactions on Antennas and Propagation, Vol. 56, n 12, pp. 3689–3699, December 2008.

5. H. Rajagopalan and Y. Rahmat-Samii, “Dielectric and Conductor Loss Quantification for Microstrip Reflectarray: Simulations and Measurements,” IEEE Transactions on Antennas and Propagation, Vol. 56, n 4, pp. 1192-1196, April 2008.

2007

4. R. Swamy, H. Rajagopalan, P. Vippa, M. Thakur, A. Sen, “Quadratic electro-optic effect in a nano-optical material based on the nonconjugated conductive polymer, poly(ethylenepyrrolediyl) derivative,” Solid State Communications, Vol. 143, Issues 11-12, Pages 519-521, September 2007.[pdf]

2006

3. H. Rajagopalan, Y. Rahmat-Samii, “Equivalent Strip Width for Cylindrical Wire for Mesh Reflector Antennas: Experiments, Waveguide and Plane Wave Simulations,” IEEE Transactions on Antennas and Propagation, Vol. 54, n 10, pp. 2845 - 2853, Oct. 2006. [pdf]

2. H. Rajagopalan, P. Vippa, M. Thakur, “Quadratic electro-optic effect in a novel nano-optical material based on nonconjugated conductive polymer, poly(ß-pinene),” Applied Physics Letters, Vol. 88, 033109, Jan. 2006.[pdf]

2005

1. P. Vippa, H. Rajagopalan, M. Thakur, “Electrical and optical properties of a novel nonconjugated conductive polymer,poly(ß-pinene),” Journal of Polymer Science Part B: Polymer Physics, Vol. 43, pp. 3695 – 3698, Nov. 2005.[pdf]

Conference Presentations

2009

21. Y. Rahmat-Samii and H. Rajagopalan,“From a PEC Ground Plane to an EBG Surface: A New Look at Their Underlying EM Properties,” accepted to PIERS, Moscow, August 2009.

20. H. Rajagopalan and Y. Rahmat-Samii, “A Novel Conformal All-Surface Mount RFID Tag Antenna Design,” accepted to IEEE Antennas and Propagation International Symposium, Charleston, SC, June 2009. (Invited).

19. H. Rajagopalan, P. Izdebski, and Y. Rahmat-Samii, “A Miniaturized Ingestible Antenna for Capsule Medical Imaging System,” accepted to IEEE Antennas and Propagation International Symposium, Charleston, SC, June 2009.

18. T. Koskinen, H. Rajagopalan, and Y. Rahmat-Samii, “Impedance Measurements of Various Types of Balanced Antennas with the Differential Probe Method,” IEEE International Workshop on Antenna Technology (IWAT), Santa Monica, California, March 2009. (Invited)

17. P. Izdebski, H. Rajagopalan, and Y. Rahmat-Samii, “Ingestible capsule antenna for bio-telemetry,” IEEE International Workshop on Antenna Technology (IWAT), Santa Monica, California, March 2009. (Invited)

16. H. Rajagopalan and Y. Rahmat-Samii, “On the Assessment of Dielectric Loss in Microstrip Reflectarray for Low/High Loss Substrates,” North American Radio Science Meeting (URSI) , Boulder, CO, Jan 2009.

15. H. Rajagopalan, P. Izdebski and Y. Rahmat-Samii, “Conformal Antenna Design for Ingestible Capsule Imaging System,” North American Radio Science Meeting (URSI) , Boulder, CO, Jan 2009.

2008

14. H. Rajagopalan, Y. Rahmat-Samii, “Loss Quantification for Microstrip Reflectarray: Issue of High Fields and Currents,” IEEE Antennas and Propagation International Symposium, San Diego, CA, July 2008.

13. H. Rajagopalan, Y. Rahmat-Samii, W. A. Imbriale, “Integration of RF MEMS Switches with the Reconfigurable Reflectarray Element:A Novel Patch-Slot Implementation,” IEEE Antennas and Propagation International Symposium, San Diego, CA, July 2008.

12. H. Rajagopalan, Y. Rahmat-Samii, “RF MEMS Actuated Reconfigurable Reflectarray: A Novel Patch-Slot Element Design,” North american Radio Science Meeting (URSI) 2008, Boulder, CO, Jan 2008. [pdf]

2007

11. H. Rajagopalan, Y. Rahmat-Samii,“MEMS Based Reconfigurable Reflectarray Element,” International Symposium on Elcetrocmagnetic Theory (EMTS) 2007, Ottawa, Canada, July 2007.[pdf]INVITED

10. H. Rajagopalan, Y. Rahmat-Samii,“S-Curve Characterization of Reconfigurable Reflectarray Element: Simulations and Measurements,” North american Radio Science Meeting (URSI) 2007, Ottawa, Canada, July 2007. [pdf]

9. H. Rajagopalan, Y. Rahmat-Samii, W. A. Imbriale, “Reconfigurable Patch-Slot Reflectarray Elements using RF MEMS Switches: A Subreflector Wavefront Controller,” IEEE Antennas and Propagation International Symposium, Honolulu, Hawaii, June 2007.[pdf]

8. S. Xu, H. Rajagopalan, Y. Rahmat-Samii, W. A. Imbriale, “A Novel Reflector Surface Distortion Compensating Technique Using a Sub-Reflectarray,” IEEE Antennas and Propagation International Symposium, Honolulu, Hawaii, June 2007.[pdf]

7. H. Rajagopalan, Y. Rahmat-Samii,Amane, Miura, “Mesh Reflector Antennas with Complex Weaves: PO/Periodic MoM and Equivalent Strip Width Verification,” IEEE Aerospace Conference, Big Sky, MT, March 2007.[pdf]

2006

6. H. Rajagopalan, Y. Rahmat-Samii, “Reconfigurable reflectarray element characterization,” European Conference on Antennas and Propagation, Nice, France, Nov. 2006.[pdf]

5. H. Rajagopalan, Y. Rahmat-Samii, “Experimental and Numerical Analysis to determine the equivalent strip width for cylindrical wire for mesh reflector antennas,” IEEE Antennas and Propagation International Symposium, Albuquerque, NM, July 2006.[pdf]

4. A. Narayanan, J. Titus, H. Rajagopalan, P. Vippa, M. Thakur, “Single-crystal films of a combination of materials (co-crystal) involving DAST and IR-125 for electro-optic applications,” American Physical Society March Meeting,Baltimore, MD, March 13-17, 2006.[pdf]

3. H. Rajagopalan, Y. Rahmat-Samii, “Equivalent Strip Width for Cylindrical wire: Experimental and Numerical Verification,” National Radio Science Meeting, Boulder, CO, Jan. 4-7, 2006.[pdf]

2005

2. R. Swamy, P. Vippa, H. Rajagopalan, J. Titus, M. Thakur, A. Sen, “Quadratic Electro-Optic Effect and Electroabsorption in a Novel Nano-Optical Material based on the Nonconjugated Conductive Polymer, Poly(ethylenepyrrolediyl) Derivative,” American Physical Society March Meeting, Los Angeles, CA, March 21-25, 2005.[pdf]

2004

1. M. Thakur, P. Vippa, H. Rajagopalan, “Poly-beta-pinene, a Novel Nonconjugated Conductive Polymer,” American Physical Society March Meeting, Montreal, Quebec, Canada, March 22-26, 2004.[pdf]

In Submission

1. H. Rajagopalan and Y. Rahmat-Samii, “Dielectric Loss Assessment: Conductor Backed Slab, Reflectarray Element and Patch Antenna,” submitted to IEEE Transactions on Antennas and Propagation.

In Preparation

1. H. Rajagopalan, T. Koskinen and Y. Rahmat-Samii, “Simple Conformal Platform Tolerant RFID Tag Design.”

2. H. Rajagopalan and Y. Rahmat-Samii, “EBG surfaces: Physics and EM charateristics.” (book chapter)

Awards

1. Best Poster Award - First place in the 2009 is awarded first place in the 2009 Student Poster Competition organized by he UCLA Engineering Tech Forum for the paper entitled “Conformal Ingestible Antenna for Capsule Medical Imaging System.”

2. National Aeronautics and Space Administration (NASA) Tech Brief Award: “Microelectromechanical Systems (MEMS) actuated Wave Front Correcting Subreflector: Distortion Compensation for Large Reflector Antennas,” December 2008

3. Student Paper Finalist Award (Top 15 out of 176 student papers) - H. Rajagopalan, Y. Rahmat-Samii and W. A. Imbriale, “Integration of RF MEMS switches with the Reconfigurable Reflectarray Element: A Novel Patch-Slot Element Implementation,” IEEE Antennas and Propagation Symposium, San Diego, CA, July 2008.

4. Best Paper Award - First place in the 2008 Student Paper Competition organized by The United States National Committee for the International Union of Radio Science (URSI) for the paper entitled “RF MEMS Actuated Reconfigurable Reflectarray: A Novel Patch-Slot Element Design.”