High Q Dual Band Super High Frequency Notch Filter Based on Complementary Metamaterial

2018 ◽  
Author(s):  
Tanveer Ul Haq ◽  
Cunjun Ruan ◽  
Ruochen Wang ◽  
Tianyi Wu
Keyword(s):  
High Frequency ◽  
Notch Filter ◽  
Dual Band ◽  
High Q ◽  
Super High Frequency

High power and immunity high Q PMC packaged dual notch high power suspended defected stripline filter

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ahmed F. Elshafey ◽  
Mahmoud A. Abdalla
Keyword(s):  
High Power ◽  
Notch Filter ◽  
Dual Band ◽  
Magnetic Conductor ◽  
High Q ◽  
Perfect Magnetic Conductor ◽  
Resonance Frequencies ◽  
Frequency Independent ◽  
Sharp Rejection ◽  
3D Em

Abstract In this paper, a novel high power high selective and high-Q packaged dual band air suspended stripline notch filter is presented. The notch frequencies, at 2.4 and 3.5 GHz, were designed using defected suspended stripline (DSS). Moreover, the filter was packaged and shielded using perfect magnetic conductor (PMC). The DSS were designed using two frequency independent non-coupled cascaded U shape resonators. It has been proved that the filter attenuation has a sharp rejection characteristic (measured) at the two resonance frequencies (27 dB at 2.4 GHz) and (30 dB at 3.5 GHz) with Quality factor = (18). So, the sharp measured filter attenuation performance was further enhanced to become 38 dB at the two frequencies. The achieved results are discussed and confirmed using different circuit, 3D EM and experimental measurements. The designed filter can find many medium powers up to 20 kW applications.

scholarly journals Antena mikrostrip berpolarisasi lingkaran pada daerah ultra high frequency dan super high frequency

2021 ◽  
Vol 1 (2) ◽  
pp. 107-114
Author(s):  
Nurjanijan Madhatillah ◽  
Hepi Ludiyati ◽  
Bagus Edy Sukoco ◽  
Yaya Sulaeman
Keyword(s):  
High Frequency ◽  
Axial Ratio ◽  
Dual Band ◽  
Dual Frequency ◽  
Ultra High Frequency ◽  
Super High Frequency

Beberapa tahun terakhir terjadi peningkatan penggunaan teknologi komunikasi WiFi dan teknologi komunikasi 5G. Kedua teknologi tersebut akan terus melayani kebutuhan manusia secara simultan. Oleh karena itu, sangat dibutuhkan sebuah peralatan yang mampu mengakomodasi kedua jaringan yang berada pada frekuensi kerja daerah ultra high frequency (UHF) dan super high frequency (SHF) tersebut dalam satu perangkat khususnya antena untuk meningkatkan efisiensi penggunaan perangkat. Pada makalah ini telah dilakukan perancangan dan simulasi sebuah antena yang bersifat dual-band menggunakan metode multi-patch dual-frequency antennas, serta penambahan metode truncated corner untuk menghasilkan polarisasi lingkaran. Dari hasil simulasi diperoleh bahwa antena mikrostrip dual-band dengan metode truncated corner memiliki frekuensi kerja 2,378 MHz dan 3540,8 MHz, bandwidth minimal 50 MHz, pola radiasi unidirectional, gain minimal 3 dBi, dan axial ratio mendekati 1,00.

The SIRIO satellite, 1968––1977: Between scientific engagement and managerial inexperience

2004 ◽  
Vol 34 (2) ◽  
pp. 371-398
Author(s):  
LUCIA ORLANDO
Keyword(s):  
International Economic ◽  
Organizational Structure ◽  
Frequency Band ◽  
High Frequency ◽  
Aerospace Industry ◽  
Space Research ◽  
High Frequency Band ◽  
Political Uncertainty ◽  
The 1960S ◽  
Super High Frequency

ABSTRACT: The story of the first Italian communications satellite, SIRIO, started in 1968, after the failure of the European project for the vector ELDO-PAS. The story up to the launch in 1977 involved the encumbering legacy of the San Marco satellite's success in the 1960s, political uncertainty in Italy, international economic crises of the 1970s, an overtly complex management system, and an inexperienced aerospace industry. Despite these handicaps, SIRIO won the race with its nearest competitor, the European satellite OTS, which had a similar research aim in the super high frequency band. In addition to collecting a large amount of useful data, SIRIO catalyzed the process for developing an improved organizational structure for Italian space research.

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