Modeling, Design and Demonstration for Discrete Lens Antennas with Circular-Polarization in the 60-GHz Band

International audience—This paper presents the modeling, design and demonstration of two circularly-polarized Transmit-Arrays (TA) operating in the 60-GHz band and generating a broadside beam and a 30°-tilted beam respectively. These arrays have a fairly simple structure with only three metal layers and are fabricated with a standard printed-circuit board technology. The simulated results show the performances of the unit-cells as well as the whole arrays, and detail their power budget. The experimental results in V-band are in very good agreement with the simulations and demonstrate very satisfactory characteristics. Power efficiencies up to 53.7% are reached with a 1-dB gain-bandwidth up to 9.1%, and low cross-polarization level

Réalisation d'une analgésie péridurale malgré un souhait contraire : le vécu de dix femmes

Realization of epidural analgesia despite a contrary desire : the experience of ten women. The rate of epidural analgesia in France is one of the highest in the world. This rate does not always reflect women's desire, therefore it seemed important for us to meet women who delivered under epidural analgesia despite a contrary desire to. We wanted to understand their motivation, the course of events, as well as their feelings to support maternity and finally deficiency and satisfaction. This allows us to provide avenues for professionals to ensure proper support to each patient in accordance with her plan. We conducted a qualitative study with 10 women, on the basis of semi-structured interview, between October and December 2013 interview in an independent midwife's surgery. The main motivation survey among ten women is the fear of technical gesture of epidural analgesia, often in connection with the fulfillment of a culture Other motivations are the desire for a natural childbirth, considered the best workflow and delivery. The majority of women were satisfied with their delivery and their care, with the exception of two. All the women expressed shortages. Childbirth without epidural analgesia is a thoughtful choice. It is therefore important that professionals understand the different motivations to adapt their care to each patient. Childbirth is a unique moment for both the woman and the couple, it is not standard event.Le taux d'analgésie péridurale en France est l'un des plus élevé au monde. Ce taux ne reflétant pas toujours le souhait des femmes, il nous a donc paru important d'aller à la rencontre des femmes qui ont accouché sous analgésie péridurale malgré un souhait contraire afin de comprendre leur motivation, le déroulement des événements, ainsi que leur ressenti sur la prise en charge en maternité et enfin leur manque et satisfaction. Ceci nous permettra de donner des pistes aux professionnels afin d'assurer un accompagnement propre à chaque patiente dans le respect de son projet. Nous avons mené une étude qualitative sur 10 femmes, par entretien semi dirigé entre octobre et décembre 2013, dans un cabinet de sage-femme libéral. La principale motivation relevée auprès des dix femmes est la peur du geste technique de l'APD, souvent en relation avec le respect d'une culture. Les autres motivations sont le souhait d'un accouchement naturel, considéré comme meilleur au déroulement du travail et de l'accouchement. Les femmes sont toutes satisfaites de leur accouchement et de leur prise en charge, à l'exception de deux. Mais toutes les femmes exprimaient des manques. L'accouchement sans analgésie péridurale est un choix réfléchi. Il est donc important que les professionnels comprennent les différentes motivations afin d'adapter leur prise en charge à chaque patiente et non de faire de l'accouchement, qui est un moment unique pour la femme et le couple, un événement standard

Circularly-Polarized Discrete Lens Antennas in the 60-GHz Band

This paper presents the design and demonstration of two circularly-polarized transmit-arrays operating in the 60-GHz band and generating a broadside beam and a 30°-tilted beam respectively. These arrays have a fairly simple structure with only three metal layers and are fabricated with a standard printed-circuit board technology. The simulated results show the performances of the unit-cells as well as the whole arrays, and detail their power budget. The experimental results in V-band are in very good agreement with the simulations and demonstrate very satisfactory characteristics. Power efficiencies up to 53.7% are reached with a 1-dB gain-bandwidth up to 9.1%, and low cross-polarization level

Design and demonstration of Linearly-Polarized Transmit-Arrays in X-band

International audienc

Design and Demonstration of Linearly-Polarized Transmit-Arrays in X-Band

International audienc

Wideband high-efficiency unit-cell for 1-bit and 2-bit transmit-arrays operating in X-band

International audienc

Tri-layer linearly-polarized discrete lens antenna operating in X-band, design & characterization

International audienc

Bandpass Antenna-Filter-Antenna Arrays for Filtering Applications at 40 GHz

International audience—The paper introduces new wideband Antenna-Filter-Antenna (AFA) uniform arrays that can be utilized as frequency selective surfaces (FSS) with low loss and sharp roll-off response, which are highly desirable characteristics in Q-Band. The design adopts a simple 3-layer single polarization structure consisting of two patch antennas and a resonator. Both simulations and measurements are used to characterize the performances of the proposed design. Overall results show 18.5 % 10-dB bandwidth. For the targeted band the insertion loss is less than 0.2 dB. Possible applications include quasi-optical amps, grid mixers and radomes for aircraft radar antennas

Design and demonstration of Linearly-Polarized Transmit-Arrays in X-band

International audienc