Results 21 to 30 of about 17,964 (305)
IEEE Access, 2021 The Theory of Characteristic Modes (TCM) provides a natural and systematic approach for designing Multiple-Input Multiple-Output (MIMO) antennas with high efficiency and uncorrelated antenna patterns.
Ahmed Abdelaziz +2 more
doaj +1 more source
High directivity fractal boundary microstrip patch antenna [PDF]
, 2000 A novel patch antenna with a fractal boundary condition is proposed. Experimental and numerical results corroborate the fact that the fractal characteristic of the perimeter produces localised modes.
Blanch Boris, Sebastián +3 more
core +2 more sources
Electrically Small Spiral PIFA for Deep Implantable Devices
IEEE Access, 2020 In this paper, a miniaturized implantable circularly polarized spiral Planar Inverted-F Antenna (SPIFA) in the UHF (600-800 MHz) band is presented.
Arezoo Abdi +5 more
doaj +1 more source
Numerical simulation of miniature antennas applicators of microwave radiometry for diagnostics of the functional state of the brain [PDF]
ITM Web of Conferences, 2019 This paper describes the use of Finite Difference Time Domain technique of numerical modeling for development and simulation symmetrical dipole with triangular shoulders placed in a cylindrical housing and a spiral antenna placed in a cylindrical housing
Leushin Vitaly +6 more
doaj +1 more source
On Modeling Antennas Using MoM-Based Algorithms: Wire-Grid versus Surface Triangulation
Algorithms, 2023 This paper focuses on antenna modeling using wire-grid and surface triangulation as two of the most commonly used MoM-based approaches in this field.
Adnan Alhaj Hasan +6 more
doaj +1 more source
Microstrip to parallel strip balun as spiral antenna feed [PDF]
, 2012 This paper presents the design and implementation of a microstrip to parallel strip balun which are frequently used as balanced antennas feed. This wideband balun transition is composed of a parallel strip which is connected to the spiral antenna and a ...
Coetzee, Jacob +2 more
core +2 more sources
Passive UHF RFID Tags with Specific Printed Antennas for Dielectric and Metallic Objects Applications [PDF]
Radioengineering, 2017 Design process and respective results for the synthesis of specific Radiofrequency Identification(RFID) tag antennas, suitable for dielectric and metallic objects, are presented. The antennas were designed for the UHF(865MHz-869MHz) band and their basic
K. Siakavara +3 more
doaj
IEEE Access, 2021 This paper presents a new design for a wideband circularly polarized (CP) spiral antenna array fed by a differential aperture coupling. The differential excitation is realized by two vias located at the lateral sides of a transverse slot etched on the ...
Elham Baghernia +2 more
doaj +1 more source
Mixed-mode impedance and reflection coefficient of two-port devices [PDF]
, 2012 From the point of view of mixed-mode scattering parameters, Smm, a two-port device can be excited using different driving conditions. Each condition leads to a particular set of input reflection and input impedance coefficient definitions that should be ...
Carrasco, T. +5 more
core +1 more source
Polarization Diversity on ESM Systems
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsPolarization diversity antenna arrays are applied to electronic support measures (ESM) systems since the 1980s. However, even today modern systems are conceived with the employment of the traditional and inconvenient spiral antennas and there are no ...
Rafael Gonçalves Licursi de Mello +1 more
doaj +1 more source