@article {20_TAP_PABLO_ESCALONA_SLOT_CONFORMAL_CIRCULAR_WAVEGUIDE,
	title = {High-Gain Conical-Beam Traveling-Wave Array Antenna Based on a Slotted Circular Waveguide at $Ku$ -Band},
	journal = {IEEE Transactions on Antennas and Propagation},
	volume = {68},
	number = {8},
	year = {2020},
	month = {Aug},
	pages = {6435-6440},
	abstract = {A high-gain conical-beam traveling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band. A single radiating element is formed by a ring of eight equally spaced slots fed by a circular waveguide. The excitation of the nonfundamental TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the design rules of traveling-wave arrays. Every ring is properly designed to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite and fifth-generation communications. The proposed antenna design has been manufactured in plastic material by using a 3-D printing process and plated by a spray metallization process. A -10 dB impedance bandwidth higher than 23\%, high-gain values around 13.5 dB, or total efficiency higher than 98\% has been achieved for the whole frequency band.},
	keywords = {Antenna arrays, antenna radiation patterns, circular waveguides, Couplings, Dipole antennas, omnidirectional antennas, Slot antennas},
	issn = {1558-2221},
	doi = {10.1109/TAP.2020.2970031},
	author = {P Sanchez-Olivares and J L Masa-Campos and E Garcia-Marin and D Escalona-Moreno}
}
@conference {19_URSI_PABLO_CONICAL_ARRAY_SLOTTED_ESCALONA,
	title = {Conical-beam travelling-wave array antenna based on slotted circular waveguide at Ku-band},
	booktitle = {Simposium Nacional URSI 2019},
	year = {2019},
	month = {September},
	abstract = {A high-gain conical-beam travelling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band (16-18 GHz). The single radiating element is formed by a ring of equally spaced slots fed by a circular waveguide. The excitation of the TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the conventional design rules of travelling-wave arrays. Every ring is optimized to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite communications. The proposed design has been manufactured by using a 3D printing process. Input matching under -15 dB, high-gain values around 13.5 dB or total efficiency higher than 98\% have been achieved for the whole frequency band.},
	author = {P Sanchez-Olivares and J L Masa-Campos and D Escalona-Moreno and E Garcia-Marin}
}
@article {15-Bazil-Miriam,
	title = {Hypo-Rayleigh Distribution for Short Range Wide -Band Directive Indoor Channel Fading Modeling at 3.3 and 5.5 GHz Bands},
	journal = {Springer},
	year = {2015},
	month = {July},
	pages = {22},
	abstract = {Propagation loss models for indoor environment are presented. The directive channel propagation loss in indoor environment at frequency bands of 3.3 GHz with a channel bandwidth of 200 MHz and 5.5 GHz band with 320 MHz bandwidth is measured using vertical polarizations. A Set of directive panel antennas is used in the measurements. Network analyzer is used in the measurement campaign. It is noticed that the propagation loss can be modelled by two slopes propagation model giving a rise to two propagation zones. It is noticed that the first zone of propagation is almost free space propagation zone. In general, the second zone has a higher deviation from the mean value of propagation loss. A new Hypo-Rayleigh distribution is proposed to model the channel induced fading in the second zone of the propagation zones.},
	url = {http://link.springer.com/article/10.1007/s11277-015-2879-z},
	author = {Taha-Ahmed, B and M Esteban-Plaza}
}
@article {12_FED_Montejo-GaraiLeal-SevillanoRuiz-CruzEtAl_SynthesisanddesignPlasma,
	title = {Synthesis and design of waveguide band-stop filters without out-of-band spurious responses for plasma diagnosis},
	journal = {Fusion Engineering and Design},
	volume = {89},
	number = {9},
	year = {2012},
	month = {September},
	pages = {1662-1666},
	issn = {0920-3796},
	doi = {10.1016},
	url = {http://www.sciencedirect.com/science/article/pii/S0920379612003146},
	author = {Montejo-Garai, J R and C A Leal-Sevillano and J A Ruiz-Cruz and Rebollar, J M and Estrada, T}
}
@article {11_IEEEMWCL_Montejo-GaraiRuiz-CruzRebollar_In-lineEPlaneBandStop,
	title = {In-line Pure E-Plane Waveguide Band-Stop Filter with Wide Spurious-Free Response},
	journal = {IEEE Microwave and Wireless Components Letters},
	volume = {21},
	number = {4},
	year = {2011},
	month = {April},
	pages = {209-211},
	abstract = {A new compact pure E-plane waveguide structure is proposed for coupling band-rejection cavities to the main rectangular waveguide in bandstop in-line filters. This coupling structure reduces drastically the unwanted resonances in filters with a very large pass band requirement. Moreover, it has some additional advantages. First, unlike typical inductive irises, large coupling coefficients can be implemented. Second, a pure E-plane configuration is achieved, which simplifies the manufacturing and also reduces significantly the computational effort. Third, in the design, by means of distributed model circuits, the rejection cavities are individually designed and connected by phase shifters maintaining the E-plane layout. Experimental validation is demonstrated by a pseudoelliptic fifth-order bandstop filter centered at 28 GHz and 2\% fractional stop band. It is free of spurious resonances in the full Ka-band.},
	issn = {1531-1309},
	doi = {10.1109/LMWC.2011.2105468},
	url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5723025\&tag=1},
	author = {Montejo-Garai, J R and J A Ruiz-Cruz and Rebollar, J M and Estrada, T.}
}
@conference {11_MULCOPINN_Montejo-GaraiLeal-SevillanoRuiz-CruzEtAl_MultipactorpredictionBandStopFilters,
	title = {Multipactor prediction in waveguide band-stop filters with wideband spurious-free response},
	booktitle = {Proc. International workshop on Multipactor, Corona and Passive Intermodulation (MULCOPIM)},
	year = {2011},
	month = {Sep.},
	pages = {1-6},
	keywords = {corrugated waveguide, dual-band, mode-matching, optimization, Waveguide polarizers},
	url = {http://mulcopim.webs.upv.es/programme.html},
	author = {Montejo-Garai, J R and C A Leal-Sevillano and J A Ruiz-Cruz and Rebollar, J M and Estrada, T}
}
@article {03_IEEPMAP_Ruiz-CruzEstebanRebollar_Efficientboundarycontour,
	title = {Efficient boundary contour mode-matching method of H- and E-plane junctions by fast Fourier transform algorithm},
	journal = {IEE Proceedings Microwaves, Antennas and Propagation},
	volume = {150},
	number = {5},
	year = {2003},
	month = {Oct.},
	pages = {332-338},
	abstract = {An efficient boundary contour mode-matching method (BCMM) is applied to the analysis of H- and E-plane junctions with planar and circular boundaries. The proposed approach is based on the use of the fast Fourier transform (FFT) to improve an analytical BCMM method. The electromagnetic field inside the structure is expressed in terms of circular waves, whereas in the rectangular ports a modal expansion is used. Depending on the shape of the contour, the original field expansion is rewritten in plane waves or in other sets of circular waves, replacing the conventional numerical integrations by a new, more suitable procedure. Finally, the transformation between the different expansions is carried out by means of the FFT, increasing notably the efficiency of the method. The presented formulation is verified by comparing simulated results with those obtained by other numerical techniques},
	keywords = {boundary contour mode-matching method, circular boundary, circular waves, coupling integrals, efficient method, electromagnetic field, electromagnetic fields, fast Fourier transform algorithm, fast Fourier transforms, FFT algorithm, field expansion, fullwave analysis, H-plane junctions, junction matrix, mode matching, planar boundary, plane waves, simulated results, waveguide junctions E-plane junctions},
	issn = {1350-2417},
	doi = {10.1049/ip-map:20030775},
	url = {http://ieeexplore.ieee.org/iel5/2196/28221/01262347.pdf?tp=\&isnumber=\&arnumber=1262347},
	author = {J A Ruiz-Cruz and Esteban,J and Rebollar, J M}
}
