Junior Recital

List of performers and performances

Junior Recital

List of performers and performances

Low-cost manufacturing by fused filament fabrication of microwave waveguide passive devices for space applications

Presentación en poster de impresión 3D de guias de onda

Master\u27s Recital

Program listing performers and works performe

Novel dual-band single circular polarization antenna feeding network for satellite communications

In this paper a novel dual-band single circular polarization antenna feeding network for satellite communications is presented. The novel antenna feed chain1 is composed of two elements or subsystems, namely a diplexer and a bi-phase polarizer. In comparison with the classic topology based on an orthomode transducer and a dual-band polarizer, the proposed feed chain presents several advantages, such as compactness, modular design of the different components, broadband operation and versatility in the subsystems interconnection. The design procedure of this new antenna feed configuration is explained. Different examples of antenna feeding networks at 20/30 GHz are presented. It is pointed out the excellent results obtained in terms of isolation and axial ratio

Senior Recital

List of performers and performances

Junior Recital

List of performers and performances

Compact duplexing for a 680-GHz radar using a waveguide orthomode transducer

A compact 680-GHz waveguide orthomode transducer (OMT) and circular horn combination has been designed, tested, and characterized in a radar transceiver's duplexer. The duplexing capability is implemented by a hybrid waveguide quasi optical solution, combining a linear polarization OMT and an external grating polarizer. Isolation between the OMT's orthogonal ports' flanges was measured with a vector network analyzer to exceed 33 dB over a >10% bandwidth between 630 and 710 GHz. Calibrated Y-factor measurements using a mixer attached to the OMT ports reveal losses through the transmit and receive paths that sum to an average of 4.7 dB of two-way loss over 660-690 GHz. This is consistent with radar sensitivity measurements comparing the new OMT/horn with a quasi-optical wire grid beam splitter. Moreover, the radar performance assessment validates the OMT as a suitable compact substitute of the wire grid for the JPL's short-range 680-GHz imaging radar

Duplicación de miembro anterior en <i>Iguana iguana</i> (Linnaeus, 1758): registro de caso

Esta nota registra el caso de polimelia en una hembra juvenil de Iguana iguana (Squamata: Iguanidae) o iguana verde de entre cinco y seis meses de edad (camada del 2012), con talla (punta del hocico a punta de la cola) de 43 cm y peso de 60 g. El ejemplar fue capturado por el tercer autor durante la última semana de septiembre del 2012 sobre la rama de un árbol de guamuchilillo, Pithecellobium lanceolatum (Willd.) Benth., en las inmediaciones de la zona centro de la mancha urbana de Puerto Vallarta, Jalisco, México y depositado para su resguardo en la Unidad para la Conservación, Manejo y Aprovechamiento Sustentable de la Vida Silvestre (UMA) “Reptilario Cipactli” (registro INE/CITES/ DGVS-CR-IN-0610-JAL./00; Centro Universitario de la Costa de la Universidad de Guadalajara).Asociación Herpetológica Argentina (AHA

Duplicación de miembro anterior en <i>Iguana iguana</i> (Linnaeus, 1758): registro de caso

Esta nota registra el caso de polimelia en una hembra juvenil de Iguana iguana (Squamata: Iguanidae) o iguana verde de entre cinco y seis meses de edad (camada del 2012), con talla (punta del hocico a punta de la cola) de 43 cm y peso de 60 g. El ejemplar fue capturado por el tercer autor durante la última semana de septiembre del 2012 sobre la rama de un árbol de guamuchilillo, Pithecellobium lanceolatum (Willd.) Benth., en las inmediaciones de la zona centro de la mancha urbana de Puerto Vallarta, Jalisco, México y depositado para su resguardo en la Unidad para la Conservación, Manejo y Aprovechamiento Sustentable de la Vida Silvestre (UMA) “Reptilario Cipactli” (registro INE/CITES/ DGVS-CR-IN-0610-JAL./00; Centro Universitario de la Costa de la Universidad de Guadalajara).Asociación Herpetológica Argentina (AHA