Open Access. Powered by Scholars. Published by Universities.®
Electromagnetics and Photonics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Aircraft communication antenna radiation patterns circular waveguides electromagnetic wave polarisation elemental semiconductors light sources microstrip antennas planar inverted-F antennas silicon solar cells wireless sensor networks Si circularly polarised solar cell antenna ground plane light source low-power airborne communication nodes multicrystalline silicon solar cell insolation oblique angle insolation sequentially rotated printed inverted-F antennas solar cell shadow minimisation wireless sensor network (1)
- Antenna arrays elemental semiconductors silicon solar cells telecommunication power management wireless sensor networks Antenna arrays Antenna measurements Arrays Photovoltaic cells Silicon Transmission line measurements Si antenna array antenna shadows beam switching dual inverted-F array frequency 2.45 GHz lattice bus bars low-power wireless sensor multicrystalline silicon solar cell solar integrated antennas transmission lines Antenna array low profile printed inverted-F antenna multicrystalline solar cell solar integration (1)
- Asymptotic boundary conditions (1)
- Body Area Network Body-area network Footwear antenna ISM 433 MHz ISM 433??MHz Propagation Channel footwear antenna propagation channel Antenna measurements Dipole antennas Foot Footwear Surface impedance (1)
- Circular polarization (1)
- Publication
Articles 1 - 8 of 8
Full-Text Articles in Electromagnetics and Photonics
Design Method For Wideband Circularly Polarized Slot Antennas, Adam Narbudowicz, Matthias John, Vit Sipal, Xiulong Bao, Max Ammann
Design Method For Wideband Circularly Polarized Slot Antennas, Adam Narbudowicz, Matthias John, Vit Sipal, Xiulong Bao, Max Ammann
Articles
A compact ultrawideband (UWB) circularly polarized (CP) slot antenna is proposed with a methodology for automated reoptimization for packaging with proprietary devices. The slot structure employs a dual-feed with an integrated compact UWB phase shifter. The design process involves an advanced optimization algorithm and demonstrates the use of spline curves for generation of CP signals. These allow easy optimization, while preserving phase coherency across a wideband. The prototyped antennahas a CP bandwidth of 54% (from 3.2 to 6.1 GHz).
Planar Dual-Mode Mimo Antenna With Enhanced Bandwidth, Adam Narbudowicz, Slawomir Koziel, Max Ammann, Dirk Heberling
Planar Dual-Mode Mimo Antenna With Enhanced Bandwidth, Adam Narbudowicz, Slawomir Koziel, Max Ammann, Dirk Heberling
Conference papers
The paper proposes a dual-port pa MIMO applications, optimized using optimization techniques. The antenna uses two (TM100 and TM200) to generate two indep patterns. To enhance the bandwidth of TM200 ground plane was realized as a meshed surfac approach provides 97 MHz of bandwidth, while profile of 1.5 mm between the patch and the g 3.5). The numerical optimization involved 12 adj parameters.
Towards Circularly Polarized Reconfigurable Huygens Source, Adam Narbudowicz, Max Ammann, Dirk Heberling
Towards Circularly Polarized Reconfigurable Huygens Source, Adam Narbudowicz, Max Ammann, Dirk Heberling
Conference papers
The paper investigates an array of two reconfigurable circularly-polarized antennas with omnidirectional radiation pattern. The results are based on a previously reported antenna, which offers a steerable dipolelike radiation pattern. Its capabilities allow reception of a signal from practically any direction with steering realized by rotation of the pattern around a single axis. In this paper we propose to extend this functionality by forming an array of two such antennas oriented as a Huygens source. Simulations demonstrate six distinctive radiation patterns, each illuminating a different sector of the surrounding sphere. This allows increased antenna gain and simplification of the steering …
Insole Antenna For On-Body Telemetry, Domenico Gaetano, Patrick Mcevoy, Max Ammann, Matthias John, Colm Brannigan, Louise Keating, Frances Horgan
Insole Antenna For On-Body Telemetry, Domenico Gaetano, Patrick Mcevoy, Max Ammann, Matthias John, Colm Brannigan, Louise Keating, Frances Horgan
Articles
A 433 MHz antenna is proposed for integration with the insole of footwear for a body area network. The folded dipole design with an asymmetric groundplane radiates from its edges and considers the close proximity of the human foot and ground surfaces. It functions for different ground conductivity conditions and an on-body communication link with an Inverted F Antenna in the upper body area was evaluated on a static and dynamic human subject. The antenna solution was compliant with Specific Absorption Rate requirements, remains matched and links with upper-body nodes regardless of the body posture and node location.
Circularly Polarized Solar Antenna For Airborne Communication Nodes, Oisin O’Conchubhair, Adam Narbudowicz, Patrick Mcevoy, Max Ammann
Circularly Polarized Solar Antenna For Airborne Communication Nodes, Oisin O’Conchubhair, Adam Narbudowicz, Patrick Mcevoy, Max Ammann
Articles
A circularly polarized solar cell antenna consisting of four sequentially rotated printed inverted-F antennas is proposed. Four multicrystalline silicon solar cells act as the ground plane and the antenna is suitable for low power airborne communication nodes and wireless sensor networks. The antenna design was developed to allow 100% insolation of the cells when directly facing a light source. The low-profile antenna minimises shadowing of the solar cell for oblique angle insolation.
On Pattern Reconfigurable Antennas Steered By Modulation Scheme, Adam Narbudowicz, Max Ammann, Dirk Heberling
On Pattern Reconfigurable Antennas Steered By Modulation Scheme, Adam Narbudowicz, Max Ammann, Dirk Heberling
Conference papers
The paper demonstrates how a modulation constellation can be used to steer the radiation pattern of a reconfigurable omnidirectional circularly polarized antenna. The proposed approach offers the benefit of digital beamforming while using a single antenna: the steering can be executed by low frequency electronics and independently for each frequency channel. In the proposed study, the antenna is excited by a signal generated by two I/Q modulators. By appropriately changing the I and Q components, a phase shift is generated which effectively steers the radiation pattern. The results were achieved using cosimulation between CST Microwave Studio and CST Design Studio.
Analysis And Characterization Of Finite-Size Curved Frequency Selective Surfaces, Francesco Mattiello, Giovanni Leone, Giuseppe Ruvio
Analysis And Characterization Of Finite-Size Curved Frequency Selective Surfaces, Francesco Mattiello, Giovanni Leone, Giuseppe Ruvio
Articles
Frequency Selective Surfaces (FSSs) are spatial filters that are largely employed in radomes for radars and antennas where high performance is necessary. FSS can be categorised in terms of their frequency behaviour. Band-pass FSS structures are able to let the electromagnetic wave pass in certain frequency ranges and shield others, which are especially suitable for out-of-band stealth of radomes. The properties of frequency selectiveness of these screens are used at microwave and infrared wavelengths. By tuning the electrical size and geometry of the unit-cell (patch or aperture) different frequency behaviours of the structure are generated. Although their analysis and simulation …
Integration Of Antenna Array With Multicrystalline Silicon Solar Cell, Oisin O'Conchubhair, Patrick Mcevoy, Max Ammann
Integration Of Antenna Array With Multicrystalline Silicon Solar Cell, Oisin O'Conchubhair, Patrick Mcevoy, Max Ammann
Articles
The integration of a low-profile antenna array with a multicrystalline silicon solar cell capable of powering a low-power wireless sensor at 2.45 GHz is reported. Lattice bus bars on the cell are exploited to minimize antenna shadows from low-profile antennas and transmission lines for a higher output power. The dual inverted-F array improves gain, and beam switching enables the array to sweep a wider coverage angle with larger beamwidths compared to other solar integrated antennas.