Publications related to Radiation resistance

Reconfigurable Pixel-Layer Isolator for Frequency-Tunable On-Frequency Repeaters

The maximum gain in on-frequency repeaters is limited by the isolation level between their two antennas due to close-loop stability conditions. In this letter, a novel pixel-layer isolator for tunable on-frequency repeaters is presented. The scattered fiel ...

Institute of Electrical and Electronics Engineers2014

Frequency, Radiation Pattern and Polarization Reconfigurable Antenna Using a Parasitic Pixel Layer

Daniel Rodrigo Lopez

This communication presents a reconfigurable antenna capable of independently reconfiguring the operating frequency, radiation pattern and polarization. A switched grid of small metallic patches, known as pixel surface, is used as a parasitic layer to prov ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Comparison of Cavity-based Ultra Wideband Antenna Efficiency Measurement Methods

Anja Skrivervik, Nuno Miguel Faria Pires

This article reviews the family of Ultra Wideband (UWB) antenna radiation efficiency measurement methods com- monly known as the UWB Wheeler cap. Measurement results of one UWB and two narrowband antennas are compared with the recently introduced source-st ...

2014

Dual-Polarized Partially Reflective Surface Antenna With MEMS-Based Beamwidth Reconfiguration

Julien Perruisseau-Carrier, Tomislav Debogovic

A partially reflective surface (PRS) antenna design enabling 1-bit dynamic beamwidth control is presented. The antenna operates at X-band and is based on microelectromechanical systems (MEMS) technology. The reconfigurable PRS unit cell monolithically inte ...

Institute of Electrical and Electronics Engineers2014

A novel, low-profile, vertically-polarized UWB antenna for WBAN

Anja Skrivervik, Jean-François Zürcher, Mohsen Koohestani

This paper proposes a novel, low-profile UWB antenna for wireless body area network (WBAN) applications. The antenna has a polarization perpendicular to the body-free-space interface, which is interesting in order to minimize the coupling into the body. It ...

Institute of Electrical and Electronics Engineers2014

Acoustic Leaky-Wave Antenna

Hervé Lissek, Sami Driss Karkar, Seyyed Hussein Seyyed Esfahlani

In the last years, the number of studies carried out in the field of acoustic metamaterials has significantly increased. In year 2009, our group proposed a concept of acoustic composite right/left hand transmission line (CRLH-TL) metamaterial, consisting o ...

2014

Synthesis of uniform amplitude focused beam arrays

Juan Ramon Mosig, Anja Skrivervik, Benjamin Fuchs

An iterative algorithm to synthesize uniform amplitude focused beam arrays is presented. While the number of array elements and the excitations are fixed and known, the locations of the elements are optimized to radiate a narrow beam low sidelobe pattern. ...

IEEE2013

On the Validity of Approximate Formulas for the Evaluation of the Lightning Electromagnetic Fields in the Presence of a Lossy Ground

The accuracy of approximate formulas for the evaluation of lightning electromagnetic fields above and inside a lossy ground is investigated taking as reference full-wave numerical results obtained using a parallel implementation of the finite-difference ti ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Design, manufacture and test of a low-cost shaped-beam reflectarray using a single layer of varying-sized printed dipoles

This paper presents the design, manufacture and test of a low-cost reflectarray antenna that provides a sectored-cosecant squared beam. The bandwidth limitation of single-layer reflectarrays is overcome by using three parallel dipoles in each cell. First, ...

Institute of Electrical and Electronics Engineers2013

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Radiation resistance

Reconfigurable Pixel-Layer Isolator for Frequency-Tunable On-Frequency Repeaters

Frequency, Radiation Pattern and Polarization Reconfigurable Antenna Using a Parasitic Pixel Layer

Comparison of Cavity-based Ultra Wideband Antenna Efficiency Measurement Methods

Dual-Polarized Partially Reflective Surface Antenna With MEMS-Based Beamwidth Reconfiguration

Physical bounds on absorption and scattering for cloaked sensors

A novel, low-profile, vertically-polarized UWB antenna for WBAN

Acoustic Leaky-Wave Antenna

Synthesis of uniform amplitude focused beam arrays

On the Validity of Approximate Formulas for the Evaluation of the Lightning Electromagnetic Fields in the Presence of a Lossy Ground

Design, manufacture and test of a low-cost shaped-beam reflectarray using a single layer of varying-sized printed dipoles

Graph Chatbot

Chat with Graph Search

Comparison of Cavity-based Ultra Wideband Antenna Efficiency Measurement Methods

On the Validity of Approximate Formulas for the Evaluation of the Lightning Electromagnetic Fields in the Presence of a Lossy Ground

Design, manufacture and test of a low-cost shaped-beam reflectarray using a single layer of varying-sized printed dipoles

Dual-Polarized Partially Reflective Surface Antenna With MEMS-Based Beamwidth Reconfiguration

Physical bounds on absorption and scattering for cloaked sensors

Reconfigurable Pixel-Layer Isolator for Frequency-Tunable On-Frequency Repeaters

Frequency, Radiation Pattern and Polarization Reconfigurable Antenna Using a Parasitic Pixel Layer

A novel, low-profile, vertically-polarized UWB antenna for WBAN

Acoustic Leaky-Wave Antenna

Synthesis of uniform amplitude focused beam arrays