scholarly journals High Power Combline Filter for Deep Space Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. V. G. Subramanyam ◽  
D. Siva Reddy ◽  
V. K. Hariharan ◽  
V. V. Srinivasan ◽  
Ajay Chakrabarty
Keyword(s):  
High Power ◽  
Filter Design ◽  
Test Results ◽  
Rf Power ◽  
Space Applications ◽  
Power Filter ◽  
Rejection Filter ◽  
Design And Testing ◽  
High Rejection ◽  
Orbiter Mission

An S-band, compact, high power filter, for use in the Mars Orbiter Mission (MOM) of Indian Space Research Organization (ISRO), has been designed and tested for multipaction. The telemetry, tracking, and commanding (TT&C) transponder of MOM is required to handle continuous RF power of 200 W in the telemetry path besides simultaneously maintaining an isolation of greater than 145 dBc to its sensitive telecommand path. This is accomplished with the help of a complex diplexer, requiring high power, high rejection transmit path filter, and a low power receive path filter. To reduce the complexity in the multipaction-free design and testing, the transmit path filter of the diplexer is split into a low rejection filter integral to the diplexer and an external high rejection filter. This paper highlights the design and space qualification phases of this high rejection filter. Multipaction test results with 6 dB margin are also presented. Major concerns of this filter design are isolation, insertion loss, and multipaction. Mission performance of the on-board filter is normal.

Dielectric-loaded L-band filters for high-power space applications

2021 ◽  
pp. 1-11
Author(s):  
Paolo Vallerotonda ◽  
Fabrizio Cacciamani ◽  
Luca Pelliccia ◽  
Alessandro Cazzorla ◽  
Davide Tiradossi ◽  
...  
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Rf Power ◽  
Space Applications ◽  
High Q ◽  
Critical Issues ◽  
L Band ◽  
Multipactor Discharge ◽  
Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

scholarly journals High-Power Filter Design in Waveguide Technology: Future Generation of Waveguide Satellite Filters in Payloads Handling Increasing Bit Rates and Numbers of Channels

2020 ◽  
Vol 21 (6) ◽  
pp. 46-57
Author(s):  
Ivan Arregui ◽  
Fernando Teberio ◽  
Israel Arnedo ◽  
Jon Mikel Percaz ◽  
Petronilo Martin-Iglesias ◽  
...  
Keyword(s):  
High Power ◽  
Filter Design ◽  
Future Generation ◽  
Power Filter

High power SP4T MEMS switch for space applications

2012 ◽  
Author(s):  
Paola Farinelli ◽  
Hamza El Ghannudi ◽  
Giuseppe Resta ◽  
Benno Margesin ◽  
Mirko Erspan ◽  
...  
Keyword(s):  
High Power ◽  
Space Applications ◽  
Mems Switch

scholarly journals An Experimental Characterization of TORVEastro, Cable-Driven Astronaut Robot

Robotics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 21
Author(s):  
Francesco Samani ◽  
Marco Ceccarelli
Keyword(s):  
Mechanical Design ◽  
Vision System ◽  
Service Robot ◽  
Test Results ◽  
Operation Performance ◽  
Space Applications ◽  
Outdoor Space ◽  
Motion Characteristics ◽  
Three Degree Of Freedom

TORVEastro robot design is presented with a built prototype in LARM2 (Laboratory of Robot Mechatronics) for testing and characterizing its functionality for service in space stations. Several robot astronauts are designed with bulky human-like structures that cannot be convenient for outdoor space service in monitoring and maintenance of the external structures of orbital stations. The design features of TORVEastro robot are discussed with its peculiar mechanical design with 3 arm-legs as agile service robot astronaut. A lab prototype is used to test the operation performance and the feasibility of its peculiar design. The robot weighs 1 kg, and consists of a central torso, three identical three-degree of freedom (DoF) arm–legs and one vision system. Test results are reported to discuss the operation efficiency in terms of motion characteristics and power consumption during lab experiments that nevertheless show the feasibility of the robot for outdoor space applications.

Design and Testing of ITER TF Coil Insulations

2011 ◽  
Vol 21 (3) ◽  
pp. 3127-3131 ◽  
Author(s):  
Matthew W. Hooker ◽  
Jennifer K. Walsh ◽  
Mark W. Haynes ◽  
Naseem A. Munshi
Keyword(s):  
Radiation Exposure ◽  
Large Scale ◽  
Mechanical Performance ◽  
International Organization ◽  
Vacuum Impregnation ◽  
Test Results ◽  
Qualification Test ◽  
Insulation System ◽  
Cyanate Ester Resin ◽  
Design And Testing

The design of the ITER Toroidal Field (TF) coils requires an insulation system that is amenable to the very large scale vacuum impregnation processes planned for the construction of these devices, and that will provide reliable electro-mechanical performance after radiation exposure. To address this need, CTD has developed an epoxy/cyanate ester resin system designated CTD-425. This material meets the processing requirements for use in the TF coils, and cyclic mechanical testing of conductor assemblies has demonstrated its electro-mechanical strength after 60,000 mechanical cycles. In addition, this product recently passed radiation exposure tests coordinated by the ITER International Organization and is now qualified for use in constructing the TF coils. This paper summarizes the performance characterization and qualification test results for this insulation.

scholarly journals Sistem Keamanan Rumah Menggunakan RFID, Sensor PIR dan Modul GSM Berbasis Mikrokontroler

2018 ◽  
Vol 5 (1) ◽  
pp. 137-144
Author(s):  
Ade Mubarok ◽  
Ivan Sofyan ◽  
Ali Akbar Rismayadi ◽  
Ina Najiyah
Keyword(s):  
Information System ◽  
Security System ◽  
Test Results ◽  
Rfid Technology ◽  
Literature Study ◽  
Home Security ◽  
Key Word ◽  
Analysis Design ◽  
The Given ◽  
Design And Testing

Abstrak Keamanan merupakan hal sangat penting bagi setiap orang. Rumah yang sering ditinggal pemiliknya dapat dimanfaatkan oleh pencuri untuk melakukan aksinya. Oleh karena itu diperlukan sistem keamanan rumah yang efektif agar pemilik rumah dapat mengetahui informasi apabila rumahnya dibobol oleh pencuri. Penulis merancang sebuah sistem keamanan rumah dengan memanfaatkan teknologi RFID yang di lengkapi dengan sensor PIR dan modul GSM sebagai sistem informasi peringatan SMS, dimana semua sistemnya diolah dalam sebuah mikrokontroler ATmega328. Tujuan dari penelitian ini untuk mengganti kunci konvesional dengan kunci solenoid sehingga sulit untuk diduplikat serta mengurangi kesempatan aksi pencurian ketika rumah dalam keadaan kosong. Metode penelitian yang digunakan antara lain dimulai dari pengumpulan data (observasi, wawancara dan studi pustaka) serta pembuatan alat (planning, analisis, desain dan testing). Berdasarkan hasil pengujian diperoleh bahwa kunci solenoid dapat bekerja sesuai dengan kartu akses RFID yang diberikan. Sensor PIR dan modul GSM dapat bekerja dengan baik saat pencuri masuk kedalam rumah, sehingga rumah menjadi aman ketika ditinggalkan oleh pemiliknya. Kata Kunci: RFID, Sensor PIR, Modul GSM, ATmega328 Abstract Security is very important for everyone. Homes that are often left the owner can be used by thieves to perform the action. Therefore required an effective home security system so that homeowners can find out information if the house burglarized by thieves. The author designed a home security system by utilizing RFID technology that is equipped with PIR sensor and GSM module as SMS warning information system, where all the system is processed in an ATmega328 microcontroller. The purpose of this research is to change the conventional key with the solenoid key so that it is difficult to duplicate and reduce the chance of theft action when the house is empty. Research methods used, among others, starting from data collection (observation, interview and literature study) as well as making tools (planning, analysis, design and testing). Based on the test results obtained that the solenoid key can work in accordance with the given RFID access card. PIR sensors and GSM modules work well when thieves enter the house, so the house becomes secure when left by the owner. Key Word: RFID, PIR Sensor, GSM Module, ATmega328

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