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H.D. Hristov, L.P. Kamburov, J.R. Urumov and
R Feick. Reply to Comments on 'Focusing Characteristics of Curvilinear Half-Open Fresnel Zone Plate Lenses: Plane Wave Illumination'. In IEEE Transactions on Antennas and Propagation, Vol. 54(9):2692-2693, September 2006. 
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H.D. Hristov, L.P. Kamburov, J.R. Urumov and
R Feick. Focusing Characteristics of Curvilinear Half-Open Fresnel Zone Plate Lenses: Plane Wave Illumination. In IEEE Transactions on Antenna and Propagation, Vol. 53(6):1912-1919, June 2005.
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L.P. Kamburov,
H.D. Hristov, J.R. Urumov and
R Feick. Corvilinear Fresnel-Zone Plate Lens Antena: Radiation Theory. In International Journal of Infrared and Milimeter Waves, Vol. 26(11):1593-1611, November 2005.
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L.P. Kamburov,
H.D. Hristov and
R Feick. Optimum Design of Millimeter-Wave Double-Dielectric Fresnel Zone-Plate Lens and Antenna. In International Journal of Infrared and Millimeter Waves, Pages 301-316, February 2004.
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H.D. Hristov,
R Feick,
W. Grote and P. Fernández. Indoor Signal Focusing by Means of Fresnel Zone Plate Lens Attached to Building Wall. In IEEE Transactions on Antennas and Propagation, Vol. 52(4):933-940, April 2004.
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H Carrasco,
H.D. Hristov,
R Feick and D. Cofré. Mutual Coupling between Planar Inverted-F Antennas. In Microwave and Optical Technology Letters, Vol. 42(3):224-227, August 2004.
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D. Peña,
H.D. Hristov,
R Feick and
W. Grote. Measurement and Modeling of Propagation Losses in Brick and Concrete Walls for the 900-MHz Band. In IEEE Transactions on Antenas and Propagation, Vol. 51(1):31-39, January 2003.
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H.D. Hristov,
R Feick,
W. Grote and P. Fernández. Indoor signal focusing by use of Fresnel zone plate. In Electronics Letters, Vol. 39(1):67-68, January 2003.
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H.D. Hristov,
R Feick, J.R. Urumov and G. Kirov. Dual-band assembly of integrated short back-fire antennas: design and numerical study. In Microwave Journal, Vol. 50(1):86-88, January 2007.
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H.D. Hristov, L.P. Kamburov, J.R. Urumov,
R Feick, A.I. Atanassov and
W. Grote. Conical double-dielectric Fresnel-zone lens and antenna. In IEEE Microwave and Wireless Components Letters, Vol. 17(5):325-327, May 2007.
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H Carrasco,
R Feick and
H.D. Hristov. Experimental Evaluation of Indoor MIMO Channel Capacity for Compact Arrays of Planar Inverted-F Antennas. In Microwave and Optical Technology Letters, Vol. 49(7):1754-1756, July 2007.
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G. Kirov, L.P. Kamburov and
H.D. Hristov. Feed line losses in microstrip antenna arrays. In Journal of Applied Electromagnetics, Vol. 7(1):1-8, 2005.
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H.D. Hristov, L.P. Kamburov,
R Feick and J.R. Urumov. Compound fresnel zone lens conformal to truncated cone: Antenna application. In International Journal of Infrared and Millimeter, Vol. 28(6):451-464, June 2007.
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A. Kumar and
H.D. Hristov. Modified backfire antenna lowers cross-polarization. In Microwaves, Vol. 16:70-73, Horizon House, USA, 1977.
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B. L. Ooi, Y. J. Fan,
H.D. Hristov,
R Feick, X. Shan and A. Lu. A Hybrid Fast Multipole Pseudo-Spectral Time Domain Method. In IEEE Transactions on Antennas and Propagation, Vol. 56(5):1394-1401, May 2008.
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B. L. Ooi, I. Ang, X. Shan, A. Lu,
R Feick and
H.D. Hristov. Wide-Slot Waveguide Antenna on LTCC Technology. In Microwave and Optical Technology Letters, Vol. 5(8):2181-2184, August 2008.
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B. L. Ooi, M. S. Leong, Z. Shong, Y. Wang, S. C. Hui,
H.D. Hristov and
R Feick. An EBG Spatial Power Combiner. In Microwave and Optical Technology Letters, Vol. 50(5):1534-1536, June 2008.
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H.D. Hristov,
W. Grote and
R Feick. Antenna Passive Repeaters for Indoor Recovery of Microwave Cellular Signals. In Microwave Journal, Vol. 51(9), September 2008.
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H.D. Hristov,
H Carrasco and
R Feick. Low-Profile X Antenna with Flat Reflector for Polarization Diversity Application. In Microwave and Optical Technology Letters, Vol. 51(6):1508-1512, June 2009.
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G. Kirov,
H.D. Hristov and
R Feick. Backfire Disk-on-rod Antenna for Long-range Point-to-point Communications. In Microwave Journal, Vol. 52(6):64, June 2009.
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H.D. Hristov, M. S. Leong, G. Kirov and
W. Grote. Waveguide-fed Backfire Antennas for Low-terahertz Frequencies. In JAE-Journal of Applied Electromagnetism, Vol. 11(2):34-44, December 2009.
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Y. J. Fan, B. L. Ooi,
H.D. Hristov and M. S. Leong. Compound diffractive lens consisting of Fresnel Zone Plate and Frequency Selective Screen. In IEEE Transactions Antennas and Propagation, Vol. 58(6):1842-1847, June 2010.
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H.D. Hristov,
H Carrasco,
R Feick and G. Kirov. Broadband two port X antenna array with flat reflector for polarization diversity actions. In Microwave and Optical Technology Letters, Vol. 52(12):2833-2837, December 2010.
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G. Kirov and
H.D. Hristov. Study of backfire antennas. In Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol. 10(1):1-12, June 2011.
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H.D. Hristov. Terahertz Harmonic Operation of Microwave Fresnel Zone Plate Lens and Antenna: Frequency Filtering and Space Resolution Propierties. In International Journal of Antennas and Propagation, Vol. 2011:8, December 2011.
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H.D. Hristov and
J.M. Rodríguez_(alumno). Design Equation for Multidielectric Fresnel Zone Plate Lens. In IEEE Microwave and Wireless Components Letters, Vol. 22(11):574-576, November 2012.
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L.A. Haralambiev and
H.D. Hristov. Radiation Characteristics of 3D Resonant Cavity Antenna with Grid-Oscillator Integrated Inside. In International Journal of Antennas and Propagation, Vol. 2014(ID 479189), 16 January 2014.
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L.P. Kamburov,
J.M. Rodríguez_(alumno), J.R. Urumov and
H.D. Hristov. Millimeter-Wave Conical Fresnel Zone Lens of Flat Dielectric Rings. In IEEE Transactions on Antennas and Propagation, Vol. 62(4):2140-2148, April 2014.
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H.D. Hristov, J.R. Urumov,
R Feick and G. Kirov. Dual-band array of integrated short nackfire antennas. In ANTEM/URSI 2006 International Symposium, Vol. 1:543-546, Montreal, Canada, 16-19 July 2006.
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B. L. Ooi,
H.D. Hristov, Y. Q. Zhang, Y. J. Fan, Y. Gao, G. Zhao, A. Lu, H. J. Lu and M. S. Leong. Development of conformal plane-conical binary Fresnel zone plate antenna for millimeter waves. In 10 th IEEE Int. Conference on Communication Systems (IEEE ICCS), Singapore, 30 October - 1 November 2006.
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J.R. Urumov, L.P. Kamburov and
H.D. Hristov. Panel Conformal Fresnel Lenses. Vol. 1:253-257, 2nd International Scientific Congress on Mechanical, Electrical and Marine Industry, MEEMI 2005, Varna, Bulgaria, 7-9 October 2005.
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H.D. Hristov, L.P. Kamburov and
R Feick. Microwave Antenna with Compound Fresnel Zone-Plate Lens Conformal to Truncated Conical Dome. Pages 113-116, 4th European Workshop on Conformal Antennas (EWCA'05), Stockholm, Sweden, 23-24 May 2005.
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R Feick,
W. Grote and
H.D. Hristov. Criterios y Procedimientos para mediciones de propagación electromagnetica en ambientes confinados. In IX Congreso Internacional de Telecomunicaciones Senacitel 2000, Valdivia, Chile, November 2000.
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L.P. Kamburov, J.R. Urumov and
H.D. Hristov. Measurement Method for Fresnel Antennas with Curved Axially-Symmetric Surface. In 11th Int. Conference Radioelektronika-2001, Vol. 2:421-424, Brno, Czech Republic, 10-11 May 2001.
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H.D. Hristov,
R Feick and
W. Grote. Improving Indoor Signal Coverage by Use of Through-Wall Passive Repeaters. In IEEE Antannas & Propagation Int. Symposium, Symp., Digest, Vol. 2:158-161, Boston, 2001.
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R Feick,
H.D. Hristov,
D. Peña and
W. Grote. Prediction of Through Wall Attenuation in the 900 MHz Band. In Proceedings of the IASTED International Conference Wireless and Optical Communications, Pages 70-74, Banff Canada, 27-29 June 2001.
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H.D. Hristov and
R Feick. The Dome-Like Fresnel-Zone Antennas (or How to Convert a Dome into Antenna) In USNC/URSI, Nat. Radio Science, Meeting, URSI Digest, Pages 46, Boston, 2001.
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R Feick,
H.D. Hristov and
W. Grote. Attenuation Measurements for Double-Mesh Reinforced Concrete Walls at the 900-MHz Cellular Band. In Int. Wireless Design Conference (WDC), Pages 165-168, London, U.K, May 2002.
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R Feick,
D Torres,
H.D. Hristov and
W. Grote. Passive Repeater for Mobile Signal Coverage of Lossy Wall Building Rooms. In Int. Wireless Design Conference (WDC), Pages 173-176, London, U.K, May 2002.
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R Feick, S Villanueva,
H.D. Hristov and
W. Grote. 3-D Source Position Determination Using Vector Correlation in a Ring Array. In IASTED Wireless and Optical Communications Conference, Vol. 1: 21-26, Banff, Canadá, July 2002.
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M. Olmos,
H.D. Hristov,
R Feick and
W. Grote. Development of Planar Inverted-F antennas with Increased Input Bandwidth. In XII Simposium Nacional de la Unión Científica Internacional de Radio (URSI), Pages 627-628, Alcalá de Henares (Madrid), September 2002.
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H.D. Hristov, L.P. Kamburov and J.R. Urumov. Comparison on Focusing Characteristics of Curvilinear Fresnel Zone Plates. In XII Simposium Nacional de la Unión Científica Internacional de Radio (URSI), Pages 469-470, Alcalá de Henares (Madrid), September 2002.
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Y. J. Fan, B. L. Ooi, M. S. Leong, X. Shan, A. Lu,
H.D. Hristov and
R Feick. PSTD-FDTD Analysis for Complex Irregular Fresnel Zone Plates. In 2nd EUCAP 2007, Pages WePa035, Edinburgh, UK, 11-16 November 2007.
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B. L. Ooi, M. S. Leong,
H.D. Hristov,
R Feick and I. Ang. An Efficient Algorithm Macrobasis-function and Progressive Method for Analyzing Microwave Filter (Invited paper) In Progress in Electromagnetics Research Symposium, PIERS 2008, Hangzhou, China, 24-28 March 2008.
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B. L. Ooi, M. S. Leong,
H.D. Hristov,
R Feick, I. Ang and C-H. Sing. An Efficient Algorithm for Analyzing Large Microstrip Structure using Macro-Baseis-Function and Progressive Method (Invited paper) In IEEE Applied Electromagnetics Conference (AEMC 2007), Kolkata, India, 19-20 December 2007.
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H.D. Hristov. Microwave Fresnel Zone Plate Antenna Runs at Multiple Terahertz Frequencies. In The International Association of Science and Technology for Development, Massachusetts, USA, 1-3 November 2010.
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H.D. Hristov,
H Carrasco, M..B. Perotoni, G. Kirov and L.P. Kamburov. Double-band backfire antenna for low-terahertz frequencies. In Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, IEEE, Chicago, IL, USA, 8-14 July 2012.
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