Results 51 to 60 of about 136,904 (200)

Nonuniform Overlapping Method in Designing Microstrip Patch Antennas Using Genetic Algorithm Optimization [PDF]

, 2015
Genetic algorithm (GA) has been a popular optimization technique used for performance improvement of microstrip patch antennas (MPAs).When using GA, the patch geometry is optimized by dividing the patch area into small rectangular cells.This has an ...
Andújar, Aurora, Anguera Pros, Jaume, Uduwawala, Disala, Jayasinghe, Jeevani   +3 more
core   +1 more source

Alternative Formulation of Antenna Arrays for DF Systems Considering Active-Element Patterns and Scattering Matrices

Sensors, 2021
Direction finding (DF) systems are used to determine the direction-of-arrival (DoA) of electromagnetic waves, thus allowing for the tracking of RF sources. In this paper, we present an alternative formulation of antenna arrays for modeling DF systems. To
Bernardo Fabiani, Eduardo Sakomura, Eduardo Silveira, Daniel Nascimento, Daniel Ferreira, Marcelo Pinho   +5 more
doaj   +1 more source

Comparison of two planar elliptical ultra-wideband PPy conductive polymer antennas

, 2012
Conductive polymers are a new type of conductive materials that are attractive for application in flexible, and possibly reconfigurable antennas. Two planar elliptical ultra-wideband antennas based on conductive polymers are manufactured.
Kaufmann, T., Al-Sarawi, S., Christophe Fumeaux, Truong, V., Said F. Al-Sarawi, Van-Tan Truong, Fumeaux, C., Thomas Kaufmann, Akhilesh Verma, Verma, A.   +9 more
core   +1 more source

Bugs and Antennae [PDF]

Science, 1922
n ...
openaire   +2 more sources

Research on the Scattering Characteristics and the RCS Reduction of Circularly Polarized Microstrip Antenna

International Journal of Antennas and Propagation, 2013
Based on the study of the radiation and scattering of the circularly polarized (CP) antenna, a novel radar cross-section (RCS) reduction technique is proposed for CP antenna in this paper.
W. Jiang, T. Hong, S. X. Gong
doaj   +1 more source

Orthogonal Genetic Algorithm for Planar Thinned Array Designs

International Journal of Antennas and Propagation, 2012
An orthogonal genetic algorithm (OGA) is applied to optimize the planar thinned array with a minimum peak sidelobe level. The method is a genetic algorithm based on orthogonal design.
Li Zhang, Yong-Chang Jiao, Bo Chen, Hong Li   +3 more
doaj   +1 more source

Reconfigurable antennas based on stub-loaded substrate-integrated circuits

, 2016
A family of reconfigurable antennas based on stub-loaded substrate-integrated circuits, including a microstrip patch, a substrate-integrated waveguide (SIW) cavity and their variations is presented.
Leonard Hall, Christophe Fumeaux, Fumeaux, C., Nghia Nguyen-Trong, Nguyen-Trong, N., Hall, L.   +5 more
core   +1 more source

Microsrip Ring Antennas Operating at Higher-Oder Modes for Mobile Communications [PDF]

, 1995
An experimental study of microstrip ring antennas suitable for use in mobile communication systems is presented. Conical radiated beams are generated by the TM(21) and TM(41) modes.
Langley, Richard J., Batchelor, John C.
core   +1 more source

A broadband integrated microwave photonic mixer based on balanced photodetection

Frontiers of Optoelectronics, 2023
An integrated microwave photonic mixer based on silicon photonic platforms is proposed, which consist of a dual-drive Mach–Zehnder modulator and a balanced photodetector.
Zhenzhu Xu, Li Mei, Yuhua Chong, Xudong Gao, Shoubao Han, Chengkun Yang, Lin Li   +6 more
doaj   +1 more source

Triband Omnidirectional Circularly Polarized Dielectric Resonator Antenna with Top-Loaded Alford Loop

International Journal of Antennas and Propagation, 2014
A triband omnidirectional circularly polarized dielectric resonator antenna with a top-loaded modified Alford loop for GSM, WLAN, and WiMAX applications is proposed. Fed by an axial probe, the DRA (dielectric resonator antenna) radiates like a vertically
Chunxia Cheng, Fushun Zhang, Yali Yao, Fan Zhang   +3 more
doaj   +1 more source