Titre :

Improvement of Directivity Characteristics of Diffraction Radiation Antenna by Varying Profile of Radiating Opening
Улучшение Показателей Направленности Антенны Дифракционного Излучения Методом Вариации Профиля Излучающего Раскрыва

Auteur(s) :

Kryukov, D. [Auteur]
Ostankov, A. [Auteur]
Chernyshev, A. [Auteur]
Dachian, Serguei [Auteur]
Laboratoire Paul Painlevé - UMR 8524 [LPP]

Titre de la revue :

Bulletin of Voronezh State Technical University

Pagination :

79-90

Date de publication :

2022-03-14

Discipline(s) HAL :

Statistiques [stat]/Applications [stat.AP]

Résumé en anglais : [en]

Ensuring the effective operation of most modern radio engineering systems in the microwave and EHF ranges is impossible without the use of antennas with a high efficiency, capable of forming highly directional beams of the ...
Lire la suite >Ensuring the effective operation of most modern radio engineering systems in the microwave and EHF ranges is impossible without the use of antennas with a high efficiency, capable of forming highly directional beams of the directional pattern in space. The problem of providing the required width of the main lobe of the directional pattern at a low level of side radiation can be solved by realizing the optimal amplitude distribution of the field in the aperture. The article discusses a diffraction-type leaky wave antenna, which is an open radiating transmission line and contains a planar dielectric waveguide, shielded by a metal resonant comb-type grating. Antennas of this type are characterized by a high efficiency, and the required amplitude distribution in the aperture can be formed due to the longitudinal variation of the aiming distance - the gap between the dielectric waveguide and the comb grating. To establish the best regularity of changing the sighting distance, we used an original version of the energy calculation method, adapted to the conditions of the problem under consideration. According to the proposed method, the determination of the degree and direction of variation of the aiming distance is reduced to the problem of calculating the share of the power taken by each groove of the comb grating according to a given amplitude distribution in the aperture. The article presents the basic relationships that form the basis of the methodology. We found that the non-uniform profile of the distribution-radiating system allows improving the initial directivity of the antenna by increasing the degree of radiation concentration within the main lobe of the antenna pattern and reducing the level of the side lobes, as well as increasing the antenna gain. We established that when the sighting distance is changed in accordance with the theoretically found regularity, it is possible to reduce the level of side lobes and simultaneously increase the gain in comparison with the case of a fixed sighting distanceLire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Laboratoire Paul Painlevé - UMR 8524

Source :

Harvested from HAL