On end-fire super directivity of arrays of two elementary dipoles and isotropic radiators

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00335400" target="_blank" >RIV/68407700:21230/19:00335400 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1049/iet-map.2018.6013" target="_blank" >https://doi.org/10.1049/iet-map.2018.6013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1049/iet-map.2018.6013" target="_blank" >10.1049/iet-map.2018.6013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On end-fire super directivity of arrays of two elementary dipoles and isotropic radiators

Popis výsledku v původním jazyce

The concept of source currents of a radiating source can be employed to express its directivity in some particular cases analytically. For an antenna array, this concept can be extended to the concept of a generalised directivity based on self- and mutual radiation intensities, self- and mutual radiated powers and excitation currents of array elements. These approaches were applied to examples of the array of two elementary dipoles and the array of two isotropic radiators. Particularly, the evaluation of the directivity of the end-fire arrays, which are of special attention due to superdirective properties, was treated. Novel closed-form expressions for the directivity of these arrays with out-of-phase excitation were derived. It was observed that the end-fire directivity can be further enhanced by optimising the excitation currents of the arrays. Their optimal phase difference and corresponding increased directivity were also found analytically. The results were validated by a full-wave simulator.

Název v anglickém jazyce

On end-fire super directivity of arrays of two elementary dipoles and isotropic radiators

Popis výsledku anglicky

The concept of source currents of a radiating source can be employed to express its directivity in some particular cases analytically. For an antenna array, this concept can be extended to the concept of a generalised directivity based on self- and mutual radiation intensities, self- and mutual radiated powers and excitation currents of array elements. These approaches were applied to examples of the array of two elementary dipoles and the array of two isotropic radiators. Particularly, the evaluation of the directivity of the end-fire arrays, which are of special attention due to superdirective properties, was treated. Novel closed-form expressions for the directivity of these arrays with out-of-phase excitation were derived. It was observed that the end-fire directivity can be further enhanced by optimising the excitation currents of the arrays. Their optimal phase difference and corresponding increased directivity were also found analytically. The results were validated by a full-wave simulator.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IET Microwaves, Antennas & Propagation

ISSN

1751-8725

e-ISSN

1751-8733

Svazek periodika

13

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

2405-2411

Kód UT WoS článku

000500009400001

EID výsledku v databázi Scopus

2-s2.0-85075622123