At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate... more At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without the need of large profiles. Unfortunately, they also present larger Fresnel reflection loss than conventional lenses. This is usually tackled by implementing unattractive cumbersome designs. Here we demonstrate that simplicity is not at odds with performance and we show how the fishnet metamaterial can improve the radiation pattern of a Soret lens. The building block of this advanced Soret lens is the fishnet metamaterial operating in the near-zero refractive index regime with one of the edge layers designed with alternating opaque and transparent concentric rings made of subwavelength holes. The hybrid Soret fishnet metalens retains all the merits of classical Soret lenses such as low profile, low cost and ease of manufacturing. It is designed for the W-band of the millimeter-waves range with a subwavelength focal length FL=1.58 mm(0.5l0) aiming at a compact antenna or radar systems. The focal properties of the lens along with its radiation characteristics in a lens antenna configuration have been studied numerically and confirmed experimentally, showing a gain improvement of ,2 dB with respect to a fishnet Soret lens without the fishnet metamaterial.
This paper describes some manufacturing techniques that can be employed in order to manufacture s... more This paper describes some manufacturing techniques that can be employed in order to manufacture sub-mm wavelengths circuitry. In particular the manufacturing process of a sub-mmw mixer is analysed.
IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010), 1999
IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36194), 1998
Introduction: Quality control systems in industry can benefit from the new possibilities offered ... more Introduction: Quality control systems in industry can benefit from the new possibilities offered by THz frequency range. THz imaging systems can complement actual quality control systems and at the same time offer new information about products, improving quality and reducing costs. In this case we have implemented and imaging system to control the evolution of water content in leaves. THz
In the present paper the state of the art, possibilities, advantages and disadvantages of the pat... more In the present paper the state of the art, possibilities, advantages and disadvantages of the patented corrugated horn antennas that combine horizontal and vertical corrugations is being covered. These rather new type and probably not very well known yet, corrugated horn profiles; combine in the same horn antenna both horizontal and vertical corrugations. This horn antenna produces with reasonable bandwidth,
IEEE Transactions on Antennas and Propagation, 2002
A new horn antenna profile is presented. This new profile based on Gaussian techniques offers the... more A new horn antenna profile is presented. This new profile based on Gaussian techniques offers the best solution when the requirements related to the radiation pattern are very stringent. Short-horn antennas with high-conversion efficiency to a fundamental Gaussian beam, and therefore, very low sidelobe and cross-pol levels in a wide-frequency band, could be obtained by using the design technique presented
Corrugated horn antennas have been widely used as feedhorns for radio telescopes and radiometers.... more Corrugated horn antennas have been widely used as feedhorns for radio telescopes and radiometers. It is well known the corrugated horn high performance radiation patterns that have made them famous for very stringent applications as radio astronomy requires. However, in the last decade some very important improvements have been made to corrugated horns in terms of length, return loss, sidelobe
Telecommunication satellite horn antennas require now-a-days more and more stringent requirements... more Telecommunication satellite horn antennas require now-a-days more and more stringent requirements based mainly in the increased bandwidth necessary to accommodate more transponders to increase the capacity of the new satellite services. In this aspect horn antennas play a key role in the development of wider bandwidth services on board satellites because they are usually the reason that limits bandwidth in
International Journal of Infrared and Millimeter Waves, 1999
In this paper, the design and the measurements of a Gaussian profiled horn antenna for the 11.7-1... more In this paper, the design and the measurements of a Gaussian profiled horn antenna for the 11.7-12.2 GHz frequency band for the HISPASAT 1C satellite are presented. The study shows the possibility of improving the electromagnetic and physical features of conventional horn antennas by using Gaussian techniques.
IEEE Microwave and Wireless Components Letters, 2002
Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes ... more Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes and low crosspolar levels in a very wide bandwidth. Gaussian profiled horn antennas (GPRAs) have demonstrated their feasibility as one of the best solutions. A corrugated Gaussian horn antenna design with more than 40% bandwidth is proposed. The measured radiated far field patterns are in good agreement
IEEE Antennas and Wireless Propagation Letters, 2002
A new concept of a really compact corrugated horn antenna for global coverage with very low sidel... more A new concept of a really compact corrugated horn antenna for global coverage with very low sidelobe and cross-polar level and quite wide bandwidth is presented in this letter. This consists on the concatenation of a choke antenna together with a Gaussian profile horn antenna. A comparison of the performances of this horn design versus other author designs is included.
IEEE Antennas and Propagation Society International Symposium 1997. Digest, 1997
ABSTRACT In this paper, we present an original and short corrugated horn antenna profile to obtai... more ABSTRACT In this paper, we present an original and short corrugated horn antenna profile to obtain the Ell corrugated circular waveguide mode exciting with a pure TEll monomode smooth circular waveguide mode. We will obtain a far field pattern with a very low ...
At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate... more At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without the need of large profiles. Unfortunately, they also present larger Fresnel reflection loss than conventional lenses. This is usually tackled by implementing unattractive cumbersome designs. Here we demonstrate that simplicity is not at odds with performance and we show how the fishnet metamaterial can improve the radiation pattern of a Soret lens. The building block of this advanced Soret lens is the fishnet metamaterial operating in the near-zero refractive index regime with one of the edge layers designed with alternating opaque and transparent concentric rings made of subwavelength holes. The hybrid Soret fishnet metalens retains all the merits of classical Soret lenses such as low profile, low cost and ease of manufacturing. It is designed for the W-band of the millimeter-waves range with a subwavelength focal length FL=1.58 mm(0.5l0) aiming at a compact antenna or radar systems. The focal properties of the lens along with its radiation characteristics in a lens antenna configuration have been studied numerically and confirmed experimentally, showing a gain improvement of ,2 dB with respect to a fishnet Soret lens without the fishnet metamaterial.
This paper describes some manufacturing techniques that can be employed in order to manufacture s... more This paper describes some manufacturing techniques that can be employed in order to manufacture sub-mm wavelengths circuitry. In particular the manufacturing process of a sub-mmw mixer is analysed.
IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010), 1999
IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36194), 1998
Introduction: Quality control systems in industry can benefit from the new possibilities offered ... more Introduction: Quality control systems in industry can benefit from the new possibilities offered by THz frequency range. THz imaging systems can complement actual quality control systems and at the same time offer new information about products, improving quality and reducing costs. In this case we have implemented and imaging system to control the evolution of water content in leaves. THz
In the present paper the state of the art, possibilities, advantages and disadvantages of the pat... more In the present paper the state of the art, possibilities, advantages and disadvantages of the patented corrugated horn antennas that combine horizontal and vertical corrugations is being covered. These rather new type and probably not very well known yet, corrugated horn profiles; combine in the same horn antenna both horizontal and vertical corrugations. This horn antenna produces with reasonable bandwidth,
IEEE Transactions on Antennas and Propagation, 2002
A new horn antenna profile is presented. This new profile based on Gaussian techniques offers the... more A new horn antenna profile is presented. This new profile based on Gaussian techniques offers the best solution when the requirements related to the radiation pattern are very stringent. Short-horn antennas with high-conversion efficiency to a fundamental Gaussian beam, and therefore, very low sidelobe and cross-pol levels in a wide-frequency band, could be obtained by using the design technique presented
Corrugated horn antennas have been widely used as feedhorns for radio telescopes and radiometers.... more Corrugated horn antennas have been widely used as feedhorns for radio telescopes and radiometers. It is well known the corrugated horn high performance radiation patterns that have made them famous for very stringent applications as radio astronomy requires. However, in the last decade some very important improvements have been made to corrugated horns in terms of length, return loss, sidelobe
Telecommunication satellite horn antennas require now-a-days more and more stringent requirements... more Telecommunication satellite horn antennas require now-a-days more and more stringent requirements based mainly in the increased bandwidth necessary to accommodate more transponders to increase the capacity of the new satellite services. In this aspect horn antennas play a key role in the development of wider bandwidth services on board satellites because they are usually the reason that limits bandwidth in
International Journal of Infrared and Millimeter Waves, 1999
In this paper, the design and the measurements of a Gaussian profiled horn antenna for the 11.7-1... more In this paper, the design and the measurements of a Gaussian profiled horn antenna for the 11.7-12.2 GHz frequency band for the HISPASAT 1C satellite are presented. The study shows the possibility of improving the electromagnetic and physical features of conventional horn antennas by using Gaussian techniques.
IEEE Microwave and Wireless Components Letters, 2002
Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes ... more Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes and low crosspolar levels in a very wide bandwidth. Gaussian profiled horn antennas (GPRAs) have demonstrated their feasibility as one of the best solutions. A corrugated Gaussian horn antenna design with more than 40% bandwidth is proposed. The measured radiated far field patterns are in good agreement
IEEE Antennas and Wireless Propagation Letters, 2002
A new concept of a really compact corrugated horn antenna for global coverage with very low sidel... more A new concept of a really compact corrugated horn antenna for global coverage with very low sidelobe and cross-polar level and quite wide bandwidth is presented in this letter. This consists on the concatenation of a choke antenna together with a Gaussian profile horn antenna. A comparison of the performances of this horn design versus other author designs is included.
IEEE Antennas and Propagation Society International Symposium 1997. Digest, 1997
ABSTRACT In this paper, we present an original and short corrugated horn antenna profile to obtai... more ABSTRACT In this paper, we present an original and short corrugated horn antenna profile to obtain the Ell corrugated circular waveguide mode exciting with a pure TEll monomode smooth circular waveguide mode. We will obtain a far field pattern with a very low ...
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Papers by Jorge Teniente
showing a gain improvement of ,2 dB with respect to a fishnet Soret lens without the fishnet metamaterial.
showing a gain improvement of ,2 dB with respect to a fishnet Soret lens without the fishnet metamaterial.