satellite antennas
Recently Published Documents


TOTAL DOCUMENTS

142
(FIVE YEARS 28)

H-INDEX

11
(FIVE YEARS 3)

2021 ◽  
pp. 469-500
Author(s):  
Nikolai Anisimov ◽  
◽  

Based on the author’s fieldwork materials (2007–2021) as well as on sources from scientific literature, this article examines how wizards and witches are seen in today’s Udmurt village. It analyses the characters of these magic specialists within the framework of folk understanding. It explains their role, their activities and their status in the village community, it presents magical methods of combat and self-defence, as well as some trends of late years. The latest field materials show the present narratives about people who master magic strength and secret knowledge, updating the research. This new material highlights the innovative character of the research. The results allow us to say that alongside traditional understandings, there are relatively new cultural phenomena appearing at practically all the levels of the village perception of wizards and witches. The changes in the present world and the ‘fashion’ for magic knowledge give the village community a new focus on tradition. For example, people think that electricity cables, as well as mobile phone networks and satellite antennas, have started to disturb the flights of wizards and witches, and elements from other cultures have been added to magic apotropaic repertoire, etc. Thus, this article follows what is happening presently in Udmurt village communities with regard to the cultural mythical phenomena surrounding the worldview of magical specialists. The results of this research may be a useful basis for further research, and it will be important to observe the further evolution in the village reception of these phenomena.


2021 ◽  
Vol 10 (3) ◽  
pp. 31-38
Author(s):  
S. Piltyay

This article presents the results of development and optimization of a new square waveguide polarizer with diagonally located square irises. The application of suggested geometrical modification of irises form and location instead of a standard wall-to-wall irises configuration allows to exclude 45-degree twists between wideband waveguide polarizer and orthomode transducer of a dual-polarized antenna feed system. In addition, a waveguide polarizer and polarization duplexer can be manufactured by milling technology as two single details, which makes the proposed engineering solution reliable, simple for simulation, development and application. Suggested new polarizer design was developed for the satellite operating Ka-band. It contains 12 irises, which are symmetrically located in the diagonal corners of a square waveguide. Obtained optimal polarization converter provides excellent matching and polarization performance. The maximum level of VSWR is less than 1.04 for both orthogonal polarizations. Values of cross-polarization discrimination are higher than 32 dB in the operating Ka-band. Developed square waveguide polarizer with diagonally located irises can be applied in modern wideband satellite antennas.


2021 ◽  
Author(s):  
Luigi Fabiani

This article presents the design and characteristics of new wideband polarizer based on a square waveguide with diaphragms. Matching and polarization characteristics of the new polarizer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed new polarizer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Xi Chen

This article presents the design and characteristics of new wideband polarization transformer based on a square waveguide with diaphragms. Matching and polarization characteristics of the polarization transformer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed polarization transformer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Mahmud Alibaba

This article presents the design and characteristics of new wideband polarizer based on a square guide with diaphragms. Matching and polarization characteristics of the guide polarizer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed optimized guide polarizer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Mahmud Alibaba

This article presents the design and characteristics of new broadband polarizer based on a square guide with diaphragms. Matching and polarization characteristics of the guide polarizer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed square guide polarizer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Xi Chen

This article presents the design and characteristics of new wideband differential phase shifter based on a square waveguide with diaphragms. Matching and polarization characteristics of the differential phase shifter have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed differential phase shifter can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Luigi Fabiani

This article presents the design and characteristics of new wideband polarization transformer based on a square waveguide with diaphragms. Matching and polarization characteristics of the polarization transformer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed polarization transformer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Takeda Torpeda

This article presents the design and characteristics of new broadband polarizer based on a square guide with diaphragms. Matching and polarization characteristics of the guide polarizer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed square guide polarizer can be applied in modern satellite antennas.


2021 ◽  
Author(s):  
Takeda Torpeda

This article presents the design and characteristics of new broadband polarizer based on a square guide with irises. Matching and polarization characteristics of the guide iris polarizer have been simulated and optimized. Frequency dependences of the simulated characteristics are presented. Developed square guide iris polarizer can be applied in modern satellite antennas.


Sign in / Sign up

Export Citation Format

Share Document