Results 101 to 110 of about 167,149 (275)

The design and fabrication of microstrip omnidirectional array antennas for aerospace applications [PDF]

open access: yes
A microstrip antenna design concept was developed that will provide quasi-omnidirectional radiation pattern characteristics about cylindrical and conical aerospace structures. L-band and S-band antenna arrays were designed, fabricated, and, in some cases,
Appleton, M. W.   +2 more
core   +1 more source

A Broadband Single-Feed Circularly Polarized Patch Antenna with Wide Beamwidth

open access: yesInternational Journal of Antennas and Propagation, 2015
A broadband single-feed circularly polarized patch antenna with wide beamwidth is presented. The patch is coupled to four asymmetric cross slots via a microstrip ring with eight matching segments underneath the ground plane, traversing through the arms ...
Changhong Zhang   +4 more
doaj   +1 more source

High-gain self-steering microwave repeater, volume 1 Final engineering report, Jan. 1966 - Apr. 1969 [PDF]

open access: yes
Engineering model of high gain self steering microwave transponder and application to satellite communication ...
Birgenheier, R. A., Kummer, W. H.
core   +1 more source

Coplanar waveguide feeds for phased array antennas [PDF]

open access: yes
The design and performance is presented of the following Coplanar Waveguides (CPW) microwave distribution networks for linear as well as circularly polarized microstrip patches and dipole arrays: (1) CPW/Microstrip Line feed; (2) CPW/Balanced Stripline ...
Lee, Richard Q., Simons, Rainee N.
core   +1 more source

Antennas for mobile satellite communications [PDF]

open access: yes
A NASA sponsored program, called the Mobile Satellite (MSAT) system, has prompted the development of several innovative antennas at L-band frequencies. In the space segment of the MSAT system, an efficient, light weight, circularly polarized microstrip ...
Huang, John
core   +1 more source

Performance optimization of microstrip antenna array using frequency selective surfaces

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents the application of frequency selective surfaces in antenna arrays as an alternative to improve radiation parameters of the array.
Valdez A. Almeida Filho   +1 more
doaj   +1 more source

Passive Microstrip Transmitarray Lens for Ku Band [PDF]

open access: yes, 2010
The aim of this paper is to introduce a novel 12 GHz radiating design based on the idea of transmitarray lens device. In this document, an overview of the functioning of this kind of devices is given and the proposed transmitarray lens is studied, with ...
Muñoz Acevedo, Alfonso   +2 more
core   +1 more source

Adaptive Forming of the Beam Pattern of Microstrip Antenna with the Use of an Artificial Neural Network

open access: yesInternational Journal of Antennas and Propagation, 2012
Microstrip antenna has been recently one of the most innovative fields of antenna techniques. The main advantage of such an antenna is the simplicity of its production, little weight, a narrow profile, and easiness of integration of the radiating ...
Janusz Dudczyk, Adam Kawalec
doaj   +1 more source

Genetic Algorithm Optimization of a High-Directivity Microstrip Patch Antenna Having a Rectangular Profile [PDF]

open access: yes, 2013
A single high-directivity microstrip patch antenna (MPA) having a rectangular profile, which can substitute a linear array is proposed. It is designed by using genetic algorithms with the advantage of not requiring a feeding network.
Anguera, J.   +2 more
core  

A Novel Design Approach to X-Band Minkowski Reflectarray Antennas using the Full-Wave EM Simulation-based Complete Neural Model with a Hybrid GA-NM Algorithm [PDF]

open access: yes, 2014
In this work, a novel multi-objective design optimization procedure is presented for the Minkowski Reflectarray RAs using a complete 3-D CST Microwave Studio MWS-based Multilayer Perceptron Neural Network MLP NN model including the substrate constant εr ...
Demirel, S., Guneş, F., NESİL, S.
core   +1 more source

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