High-power waveguide circulators using quarter-wave long composite ferrite/dielectric resonators

1981 ◽  
Vol 128 (5) ◽  
pp. 268 ◽  
Author(s):  
J. Helszajn
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Waveguide Circulators ◽  
Quarter Wave

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.

A High Power, GaN, Quarter-Wave Length Switch for X-Band Applications

2018 ◽  
Author(s):  
Onur Memioglu ◽  
Duygu Isinsu Turan ◽  
Fatih Kocer ◽  
Ozlem Aydin Civi
Keyword(s):  
High Power ◽  
Wave Length ◽  
X Band ◽  
Quarter Wave

scholarly journals Transmission Control of Electromagnetic Waves by Using Quarter-Wave Plate and Half-Wave Plate All-Dielectric Metasurfaces Based on Elliptic Dielectric Resonators

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ali Yahyaoui ◽  
Hatem Rmili ◽  
Karim Achouri ◽  
Muntasir Sheikh ◽  
Abdullah Dobaie ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Electromagnetic Waves ◽  
Quarter Wave Plate ◽  
Dielectric Resonators ◽  
Transmission Control ◽  
Half Wave Plate ◽  
Wave Plate ◽  
Polarized Waves ◽  
Half Wave ◽  
Quarter Wave

We present the design of all-dielectric Quarter-Wave Plate (QWP) and Half-Wave Plate (HWP) metasurfaces based on elliptic dielectric resonators (EDRs) for the transmission control of electromagnetic waves over the frequency band 20–30 GHz. First, an extensive numerical analysis was realized by studying the effect of the resonators geometry (thickness and ellipticity) on the transmission of both x- and y-polarized waves. Then, based on the numerical analysis, we have realized and characterized experimentally both QWP and HWP all-dielectric metasurfaces.

FILM ATTENUATORS BASED ON FILTER STRUCTURES WITH DISSIPATIVE LOSSES

2019 ◽  
pp. 84-89 ◽  
Author(s):  
A. S. Mitkov ◽  
A. A. Stolyarenko ◽  
M. G. Rubanovich
Keyword(s):  
High Power ◽  
Short Circuit ◽  
Power Level ◽  
Wide Band ◽  
Dielectric Substrate ◽  
Minimum Size ◽  
Initial Structure ◽  
Multi Stage ◽  
Microstrip Filters ◽  
Quarter Wave

The article presents the results of a study of the frequency properties of a multi-stage high-power attenuator with attenuation of 10 dB in the frequency range 0–3 GHz, obtained on a dielectric substrate made of beryllium ceramics. For its construction, microstrip filters with quarter-wave couplings and dissipative losses are used, as well as additional film resistors made in the form of trapezoidal plumes. These loops have a minimum size in the area of a short circuit. The design features of wide-band microwave attenuators of high power are determined, including the conditions for ensuring uniform distribution of the dissipated microwave power and distribution of the resonant frequencies of low-Q resonators. Equivalent circuits were compiled, which allow to determine the initial structure of the attenuator and optimize its frequency characteristics for any power level.

scholarly journals Wireless Power Transfer System Based on Strapping Resonators

2018 ◽  
Vol 8 (12) ◽  
pp. 2341
Author(s):  
Fei-Fei Guo ◽  
Shuai Ding ◽  
Bing-Zhong Wang
Keyword(s):  
High Power ◽  
Wireless Power Transfer ◽  
Dielectric Resonators ◽  
Transfer System ◽  
Power Transfer ◽  
Dual Frequency ◽  
Wireless Power ◽  
High Power Microwave ◽  
Power Transfer Efficiency ◽  
Wireless Power Transfer System

In this study, a kind of strapped resonator is proposed to deal with high power wireless power transfer (WPT) in microwave regimes. In many specific applications, such as high power microwave wireless power transfer system (WPT), a coil resonator is not suitable due to the frequency limitations. The high cost of the high-permittivity dielectric resonators also limits their application. As a high Q resonator, the strapped resonator is often used in the anode structure of a magnetron. The field distribution of π and π + 1 modes allow the system to operate in dual-frequency mode. Numerical simulation and experimental validation show that with a certain distance, the system provides power transfer efficiency of more than 80% and 70% at 630 MHz and 970 MHz, respectively. Compared to the system based on dielectric resonators, the proposed system has higher power capacity. The leakage and radiation loss of the system is also discussed using numerical methods.

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