Search

Your search keyword '"CIRCULAR POLARIZED ANTENNAS"' showing total 5 results
Start Over Descriptor "CIRCULAR POLARIZED ANTENNAS" Search Limiters Available in Library Collection
5 results on '"CIRCULAR POLARIZED ANTENNAS"'

1. Miniatured ring slotted circular patch GNSS antenna

Author

Sheikh, R. A. (Rais Ahmad), Al-Hadi, A. A. (Azremi Abdullah), Sabapathy, T. (Thennarasan), Chun, F. M. (Fong Mun), Mirza, H. (Hidayath), Soh, P. J. (Ping Jack), Sheikh, R. A. (Rais Ahmad), Al-Hadi, A. A. (Azremi Abdullah), Sabapathy, T. (Thennarasan), Chun, F. M. (Fong Mun), Mirza, H. (Hidayath), and Soh, P. J. (Ping Jack)

Abstract

A compact circularly polarized antenna for the Global Navigation Satellite System L1 band at 1575 MHz is presented. A circular patch antenna is first designed to operate before being integrated with four ring slots to achieve the circular polarization. The antenna features a bandwidth of 1.15 % in L1, with an axial ratio bandwidth of 0.58 %. The antenna radiates towards 0° with a realized gain of 4.4 dB and an angular beamwidth of 101.3°.

Published
2021

2. Wearable Circular Polarized Antennas for Health Care, 5G, Energy Harvesting, and IoT Systems

Author

Albert Sabban

Subjects
metamaterial antennas, IoT, TK7800-8360, medical applications, Computer Networks and Communications, sensors, wearable antennas, circular polarized antennas, active sensors, 5G, energy harvesting, self-powered sensors, Hardware and Architecture, Control and Systems Engineering, Signal Processing, Electronics, Electrical and Electronic Engineering
Abstract

Novel circular polarized sensors and antennas for biomedical systems, energy harvesting, Internet of Things (IoT), and 5G devices are presented in this article. The major challenge in development of healthcare, IoT, 5G and communication systems is the evaluation of circular polarized active and passive wearable antennas. Moreover, a low-cost wearable sensor may be evaluated by printing the microstrip antenna with the sensor feed network and the active devices on the same substrate. Design considerations, comparison between simulation and measured results of compact circular polarized efficient sensors for wireless, 5G, energy harvesting, IoT, and medical systems are highlighted in this article. The electrical performance of the novel sensors and antennas on and near the user body were evaluated by employing electromagnetic software. Efficient passive and active metamaterial circular polarized antennas and sensors were developed to improve the system electrical performance. The wearable compact circular polarized passive and active sensors are efficient, flexible, and low-cost. The frequency range of the resonators, without Circular Split-Ring Resonators CSRRs, is higher by 4% to 10% than the resonators with CSRRs. The gain of the circular polarized antennas without CSRRs is lower by 2 dB to 3 dB than the resonators with CSRRs. The gain of the new passive antennas with CSRRs is around 7 dBi to 8.4 dBi. The bandwidth of the new circular polarized antennas with CSRRs is around 10% to 20%. The sensors VSWR is better than 3:1. The passive and active efficient metamaterials antennas improve the system performance.

Published
2022
Full Text
View/download PDF

3. Wearable Circular Polarized Antennas for Health Care, 5G, Energy Harvesting, and IoT Systems.

Author

Sabban, Albert

Subjects
ENERGY harvesting, ANTENNAS (Electronics), ANTENNA feeds, 5G networks, INTERNET of things, WIRELESS sensor networks, METAMATERIAL antennas, MICROSTRIP antennas
Abstract

Novel circular polarized sensors and antennas for biomedical systems, energy harvesting, Internet of Things (IoT), and 5G devices are presented in this article. The major challenge in development of healthcare, IoT, 5G and communication systems is the evaluation of circular polarized active and passive wearable antennas. Moreover, a low-cost wearable sensor may be evaluated by printing the microstrip antenna with the sensor feed network and the active devices on the same substrate. Design considerations, comparison between simulation and measured results of compact circular polarized efficient sensors for wireless, 5G, energy harvesting, IoT, and medical systems are highlighted in this article. The electrical performance of the novel sensors and antennas on and near the user body were evaluated by employing electromagnetic software. Efficient passive and active metamaterial circular polarized antennas and sensors were developed to improve the system electrical performance. The wearable compact circular polarized passive and active sensors are efficient, flexible, and low-cost. The frequency range of the resonators, without Circular Split-Ring Resonators CSRRs, is higher by 4% to 10% than the resonators with CSRRs. The gain of the circular polarized antennas without CSRRs is lower by 2 dB to 3 dB than the resonators with CSRRs. The gain of the new passive antennas with CSRRs is around 7 dBi to 8.4 dBi. The bandwidth of the new circular polarized antennas with CSRRs is around 10% to 20%. The sensors VSWR is better than 3:1. The passive and active efficient metamaterials antennas improve the system performance. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

4. Investigation of spherical and cylindrical Luneburg lens antennas by Green's function method

Author

Alexey Korotkov, Boris Panchenko, Sergey Knyazev, and Sergey Shabunin

Subjects
ANTENNA DESIGN, GREEN'S FUNCTION, Physics::Optics, GREEN'S FUNCTION METHODS, ANTENNA RADIATION FIELD, Astrophysics::Cosmology and Extragalactic Astrophysics, LENSES, MAGNETIC MULTILAYERS, Radiation pattern, law.invention, Optics, law, Dipole antenna, ANTENNA RADIATION, ELECTRIC FIELD COMPONENTS, Computer Science::Information Theory, Physics, DIRECTIONAL PATTERNS (ANTENNA), LAYERED STRUCTURES, Coaxial antenna, business.industry, CROSS-POLARIZED FIELDS, LENS ANTENNAS, Antenna aperture, Antenna measurement, Antenna factor, Luneburg lens, POLARIZATION LOSS, ELECTRIC FIELDS, Lens (optics), CYLINDRICAL ANTENNAS, APERTURE ANTENNAS, DIPOLE ANTENNAS, business, CIRCULAR POLARIZED ANTENNAS, ANTENNA RADIATION PATTERNS
Abstract

Luneburg lens antenna radiation fields are calculated with Green's functions of spherical and cylindrical layered structures. Electric field components for Luneburg lenses excited by a linear and circular polarized antenna are analyzed. Co-polarized and cross-polarized field radiation patterns are shown. Reflection from the lens, losses in the lens material, spillover and polarization loss are taken into account for antenna gain calculation. The proposed method significantly reduces computing time for multilayered lens in comparison with the most commonly used in antenna design. © 2015 Radio Society (Mauritius).

Published
2015
Full Text
View/download PDF

5. Investigation of spherical and cylindrical Luneburg lens antennas by Green's function method

Author

Knyazev, S., Korotkov, A., Panchenko, B., Shabunin, S., Knyazev, S., Korotkov, A., Panchenko, B., and Shabunin, S.

Abstract

Luneburg lens antenna radiation fields are calculated with Green's functions of spherical and cylindrical layered structures. Electric field components for Luneburg lenses excited by a linear and circular polarized antenna are analyzed. Co-polarized and cross-polarized field radiation patterns are shown. Reflection from the lens, losses in the lens material, spillover and polarization loss are taken into account for antenna gain calculation. The proposed method significantly reduces computing time for multilayered lens in comparison with the most commonly used in antenna design. © 2015 Radio Society (Mauritius).

Published
2015

Catalog

Books, media, physical & digital resources
See catalog results