[1] A. J. Richardson and P. A. Watson, "Use of the 55-65 GHz oxygen absorption band for short-range broadband radio networks with minimal regulatory control," in IEE Proceedings I - Communications, Speech and Vision, vol. 137, no. 4, pp. 233-241, Aug. 1990. [2] H. O. Peterson, H. H. Beverage and J. B. Moore, "Diversity Telephone Receiving System of R.C.A. Communications, Inc.," in Proceedings of the Institute of Radio Engineers, vol. 19, no. 4, pp. 562-584, April 1931. [3] W. C. Lee, "Antenna spacing requirement for a mobile Radio base-station diversity," in The Bell System Technical Journal, vol. 50, no. 6, pp. 1859-1876, July-Aug. 1971. [4] W. Lee and Yu Yeh, "Polarization Diversity System for Mobile Radio," in IEEE Transactions on Communications, vol. 20, no. 5, pp. 912-923, October 1972. [5] A. Adrian and D. H. Schaubert, "Dual aperture-coupled microstrip antenna for dual or circular polarization," in Electronics Letters, vol. 23, no. 23, pp. 1226-1228, 5 November 1987. [6] L. Quesnel, "Dual-polarized microstrip antenna with inset matching network," Symposium on Antenna Technology and Applied Electromagnetic, Ottawa, Canada, pp. 713-716,1994. [7] Y. Guo, K. Khoo, and L. C. Ong, "Wideband Dual-Polarized Patch Antenna With Broadband Baluns," in IEEE Transactions on Antennas and Propagation, vol. 55, no. 1, pp. 78-83, Jan. 2007. [8] C. Sim, C. Chang, and J. Row, "Dual-Feed Dual-Polarized Patch Antenna With Low Cross Polarization and High Isolation," in IEEE Transactions on Antennas and Propagation, vol. 57, no. 10, pp. 3321-3324, Oct. 2009. [9] B. Li, Y. Yin, W. Hu, Y. Ding, and Y. Zhao, "Wideband Dual-Polarized Patch Antenna With Low Cross Polarization and High Isolation," IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 427-430, 2012. [10] Zhang, Xiao-Yan, Xinxing Zhong, Bincheng Li, and Yiqiang Yu. "A Dual-Polarized MIMO Antenna with EBG for 5.8 GHz WLAN Application." Progress in Electromagnetics Research, Vol. 51, pp. 15-20, 2015. [11] Z. Frank, "A dual polarized horn with a scanning beam," 17th Convention of Electrical and Electronics Engineers in Israel, Tel Aviv, Israel, pp. 155-158, 1991. [12] F. Alessandri and R. Ravanelli, "A new class of dual-mode directional couplers for compact dual-polarization beam-forming networks," IEEE Microwave and Guided Wave Letters, vol. 7, no. 9, pp. 300-301, Sept. 1997. [13] L. Juan, F. Guang, and Y. Lin, "Design of a dual-polarized wideband short backfire antenna with high gain," in IET Microwaves, Antennas & Propagation, vol. 7, no. 9, pp. 735-740, 18 June 2013. [14] Robert E.Collin "Surface Waveguides," in Field Theory of Guided Waves, IEEE, 1991, pp.697-748. [15] R. Lawrie and L. Peters, "Modifications of horn antennas for low sidelobe levels," in IEEE Transactions on Antennas and Propagation, vol. 14, no. 5, pp. 605-610, September 1966. [16] E. Lier and T. Schaug-Pettersen, "The strip-loaded hybrid-mode feed horn," in IEEE Transactions on Antennas and Propagation, vol. 35, no. 9, pp. 1086-1089, September 1987. [17] Sievenpiper, "High-impedance electromagnetic surfaces," Ph.D. Thesis, University of California, Los Angeles, 1999. [18] P. Kildal, E. Alfonso, A. Valero-Nogueira, and E. Rajo-Iglesias, "Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates," in IEEE Antennas and Wireless Propagation Letters, vol. 8, pp. 84-87, 2009. [19] G. L. James, "Surface reactance of corrugated planes," in Electronics Letters, vol. 15, no. 23, pp. 751-753, November 1979. [20] H. Minnett and B. Thomas, "A method of synthesizing radiation patterns with axial symmetry," in IEEE Transactions on Antennas and Propagation, vol. 14, no. 5, pp. 654-656, September 1966. [21] T. Scharten, J. Nellen, and F. van den Bogaart, "Longitudinally slotted conical horn antenna with small flare angle," in IEE Proceedings H - Microwaves, Optics and Antennas, vol. 128, no. 3, pp. 117-123, June 1981. [22] M. S. Aly and S. F. Mahmoud, "Propagation and radiation behaviour of a longitudinally slotted horn with dielectric-filled slots," in IEE Proceedings H - Microwaves, Antennas and Propagation, vol. 132, no. 7, pp. 477-479, December 1985. [23] P. Kildal, "Definition of artificially soft and hard surfaces for electromagnetic waves," in Electronics Letters, vol. 24, no. 3, pp. 168-170, 4 Feb. 1988. [24] P. Kildal, E. Lier, and J. A. Aas, "Artificially soft and hard surfaces in electromagnetics and their application," IEEE AP-S. International Symposium, Antennas, and Propagation, Syracuse, NY, Vol. 2, pp. 832-835, 1988. [25] J.Bowman, T.Senior, and P.Uslenghi, "Electromagnetic and acoustics scattering by simple shapes," John Wiley & Sons, pp 5,1970. [26] P. Kildal and A. Kishk. "EM Modeling of surfaces with STOP or GO characteristics-artificial magnetic conductors and soft and hard surfaces," Applied Computational Electromagnetics Society Journal, Vol. 18, no. 1, pp. 32-40, 2003. [27] E. Rajo-Iglesias, Ó. Quevedo-Teruel and L. Inclan-Sanchez, "Planar Soft Surfaces and Their Application to Mutual Coupling Reduction," in IEEE Transactions on Antennas and Propagation, vol. 57, no. 12, pp. 3852-3859, Dec. 2009 [28] Rajo-Iglesias, Eva, Luis Inclán-Sánchez, and Oscar Quevedo-Teruel. "Back radiation reduction in patch antennas using planar soft surfaces," Progress In Electromagnetics Research, Vol. 6, pp. 123-130, 2009. [29] I. Novikova, P. -. Kildal, M. Celuch-Marcysiak, and W. Gwarek, "FDTD investigation of the field distributions in rectangular hard waveguides," IEEE Antennas and Propagation Society International Symposium, Baltimore, USA, Vol. 2, pp. 1304-1307, 1996. [30] E. Alfonso, A. Valero-Nogueira, J. I. Herranz and D. Sanchez, "Oversized waveguides for TEM propagation using hard surfaces," 2006 IEEE Antennas and Propagation Society International Symposium, Albuquerque, NM, 2006, pp. 1193-1196. [31] W.Stutzman and Thiele, "Antenna Theory and Design, " John Wiley & Sons, Inc, 2012. [32] F.Yang and Y. Rahmat-Samii, "Electromagnetic Band Gap Structures in Antenna Engineering, " Cambridge, U.K.: Cambridge Univ. Press, 2009. [33] J.Joannopoulos, S. Johnson, J. Winn, and R. Meade, "Photonic crystals: Molding the flow of light, Princeton, " New Jersey.: Princeton University Press,2007. [34] A.Zaman and P. Kildal, "Gap waveguides," in Handbook of Antenna Technologies, Z. N. Chen, D. Liu, H. Nakano, X. Qing, and T. Zwick, Eds. Singapore: Springer, 2016. [35] Y.Al-Alem, A.A Kishk, and R. M. Shubair, "Enhanced Wireless Interchip Communication Performance Using Symmetrical Layers and Soft/Hard Surface Concepts," in IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 1, pp. 39-50, Jan. 2020. [36] A. Valero-Nogueira, E. Alfonso, J. I. Herranz, and P. Kildal, "Experimental Demonstration of Local Quasi-TEM Gap Modes in Single-Hard-Wall Waveguides," in IEEE Microwave and Wireless Components Letters, vol. 19, no. 9, pp. 536-538, Sept. 2009. [37] D. Deslandes and K. Wu, "Integrated microstrip and rectangular waveguide in planar form," in IEEE Microwave and Wireless Components Letters, vol. 11, no. 2, pp. 68-70, Feb. 2001. [38] D.Pozar, "Microwave Engineering," John Wiley & Sons, Fourth Edition, pp.110-117,2012. [39] M. Esquius-Morote, M. Mattes and J. R. Mosig, "Orthomode Transducer and Dual-Polarized Horn Antenna in Substrate Integrated Technology," in IEEE Transactions on Antennas and Propagation, vol. 62, no. 10, pp. 4935-4944, Oct. 2014. [40] R. B. Keam and A. G. Williamson, "Broadband design of coaxial line/rectangular waveguide probe transition," in IEE Proceedings - Microwaves, Antennas and Propagation, vol. 141, no. 1, pp. 53-58, Feb. 1994. [41] S. I. Shams and A. A. Kishk, "Wideband Coaxial to Ridge Gap Waveguide Transition," in IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 12, pp. 4117-4125, Dec. 2016. [42] A. U. Zaman, E. Rajo-Iglesias, E. Alfonso, and P.-S. Kildal, "Design of transition from coaxial line to ridge gap waveguide," IEEE International Symposium on Antennas and Propagation and URSI National Radio Science Meeting, Charleston, SC, pp.1-4,2009. [43] D. Deslandes, "Design equations for tapered microstrip-to-Substrate Integrated Waveguide transitions," 2010 IEEE MTT-S International Microwave Symposium, Anaheim, CA, 2010, pp. 704-707. [44] Y.Cassivi, L. Perregrini, P. Arcioni, M. Bressan, K. Wu and G. Conciauro, "Dispersion characteristics of substrate integrated rectangular waveguide," in IEEE Microwave and Wireless Components Letters, vol. 12, no. 9, pp. 333-335, Sept.2007. [45] N. Bayat-Makou and A. A. Kishk, "Millimeter-Wave Substrate Integrated Dual Level Gap Waveguide Horn Antenna," in IEEE Transactions on Antennas and Propagation, vol. 65, no. 12, pp. 6847-6855, Dec.2017. [46] Yongxi Qian and T. Itoh, "A broadband uniplanar microstrip-to-CPS transition," Proceedings of 1997 Asia-Pacific Microwave Conference, Hong Kong, vol 2, pp. 609-612, 1997. [47] P. C. Ooi and K. T. Selvan, "The Effect of Ground Plane on the Performance of a Square Loop CPW-Fed Printed Antenna," Progress In Electromagnetics Research Letters, Vol. 19, 103-111, 2010. [48] D. Schaubert, E. Kollberg, T. Korzeniowski, T. Thungren, J. Johansson, and K. Yngvesson, "Endfire tapered slot antennas on dielectric substrates," in IEEE Transactions on Antennas and Propagation, vol. 33, no. 12, pp. 1392-1400, December 1985. [49] M.M.Zinieris, R.Sloan and, L. E. Davis, "A broadband microstrip to slot line transition," in Microwave and optical letters, Vol.18,no.5,pp.339-342, December 1988. [50] A. M. Bøifot, "Classification of ortho-mode transducers," Eur. Trans. Telecomm. Rel. Techn., vol. 2, no. 5, pp. 503–510, Sep. 1991. [51] W. Steffe, "A novel compact OMJ for Ku band Intelsat applications," IEEE Antennas and Propagation Society International Symposium. 1995 Digest, Newport Beach, CA, USA, vol.1, pp. 152-155, 1995. [52] A. Navarrini and R. L. Plambeck, "A turnstile junction waveguide orthomode transducer," in IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 1, pp. 272-277, Jan. 2006. [53] M. A. Abdelaal, S. I. Shams, and A. A. Kishk, "Asymmetric Compact OMT for X-Band SAR Applications," in IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 4, pp. 1856-1863, April 2018. [54] J. Attari, T. Djerafi, and K. Wu, "Planar orthogonal mode transducer based on orthogonal LSM10 and TE10 modal fields of co-layered image SINRD (iSINRD) and SIW guides," 2013 European Microwave Conference, Nuremberg, pp. 597-600,2013. [55] C. Ding, F. Meng and L. Song, "Design of a Ku-band Compact Dual Polarized Horn Arrays with OMT," 2018 IEEE/MTT-S International Microwave Symposium - IMS, Philadelphia, PA, pp. 1585-1588,2018. [56] H. Jin, Y. M. Huang, H. Jin and K. Wu, "E-Band Substrate Integrated Waveguide Orthomode Transducer Integrated with Dual-Polarized Horn Antenna," in IEEE Transactions on Antennas and Propagation, vol. 66, no. 5, pp. 2291-2298, May 2018. [57] M. A. Ali, S. C. Ortiz, T. Ivanov, and A. Mortazawi, "Analysis and measurement of hard-horn feeds for the excitation of quasi-optical amplifiers," in IEEE Transactions on Microwave Theory and Techniques, vol. 47, no. 4, pp. 479-487, April 1999. [58] Y. Zhang, A. A. Kishk, A. B. Yakovlev, and A. W. Glisson, "Analysis of Wideband Dielectric Resonator Antenna Arrays for Waveguide-Based Spatial Power Combining," in IEEE Transactions on Microwave Theory and Techniques, vol. 55, no. 6, pp. 1332-1340, June 2007. [59] P. Kildal and E. Lier, "Hard horns improve cluster feeds of satellite antennas," in Electronics Letters, vol. 24, no. 8, pp. 491-492, 14 April 1988. [60] Kyung-Ho Chung, Sung-Ho Pyun, S. Chung, and Jae-Hoon Choi, "Design of a wideband TEM horn antenna," IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting, Columbus, OH, pp. 229-232 vol.1, 2003. [61] A. A. Kishk and P. Kildal, "Quasi-TEM H-plane horns with wideband open hard sidewalls," Proceedings of the Fourth European Conference on Antennas and Propagation, Barcelona, pp. 1-4,2010. [62] N. Bayat-Makou and A. A. Kishk, "Substrate Integrated Horn Antenna With Uniform Aperture Distribution," in IEEE Transactions on Antennas and Propagation, vol. 65, no. 2, pp. 514-520, Feb. 2017. [63] C. Granet, "Profile options for feed horn design," 2000 Asia-Pacific Microwave Conference. Proceedings (Cat. No.00TH8522), Sydney, NSW, Australia, pp. 1448-1451, 2000. [64] A. D. Olver and J. Xiang, "Design of profiled corrugated horns," in IEEE Transactions on Antennas and Propagation, vol. 36, no. 7, pp. 936-940, July 1988. [65] E.V. Jull, "Horn Antennas" In Encyclopedia of RF and Microwave Engineering, pp. 1006-1017, (2005). [66] C.A. Balanis, "Advanced Engineering Electromagnetics" John Wiley & Sons, Second Edition, pp. 260-275, (2012).