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 Dual-Band Notch Filter Based on Twist Split Ring Resonators

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Haibin Sun ◽  
Cai Feng ◽  
Yongjun Huang ◽  
Ruiming Wen ◽  
Jian Li ◽  
...  
Keyword(s):  
Rectangular Waveguide ◽  
Notch Filter ◽  
Ring Resonators ◽  
Dual Band ◽  
Dielectric Slab ◽  
Split Ring ◽  
Resonance States ◽  
Split Ring Resonators ◽  
Resonance Frequencies ◽  
Two Sides

A novel dual-band rectangular waveguide notch filter is experimentally investigated in this paper. Such filter is realized by integrating two pairs of split ring resonators (SRRs) printed on the two sides of a dielectric slab with twist angles and separated as a distance in the center of the rectangular waveguide. Due to the coupling effects between the twist SRRs and between the original SRRs and their mirror images generated by the metallic walls perpendicular to the E-field direction, it can flexibly contribute two disjunct resonance states and result in the dual-band notch properties. Furthermore, the two resonance frequencies can be controlled by changing the twist angles, resulting in the shifts of notch frequency bands.

Analysis of Wideband Antenna Performance over Dual Band Artificial Magnetic Conductor (AMC) Ground Plane

2015 ◽  
Vol 735 ◽  
pp. 273-277 ◽  
Author(s):  
Raimi Dewan ◽  
M.K.A. Rahim ◽  
Mohamad Rijal Hamid ◽  
M.F.M. Yusoff
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Surface Current ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Wideband Antenna ◽  
Antenna Performance ◽  
Perfect Magnetic Conductor ◽  
Additional Resonance ◽  
Unit Cells

A Coplanar Waveguide (CPW) wideband antenna operates from 2.69 GH to 6.27 GHz which act as reference antenna (RA) has been designed. A Dual Band AMC (DBAMC) unit cells have been proposed to operate at 2.45 GHz and 5.8 GHz. AMC is a metamaterial which mimics the behavior of zero reflection phase of Perfect Magnetic Conductor (PMC) at resonance frequency which not naturally existed in nature. Subsequently the antenna is incorporated with AMC unit cell, herein referred as Antenna with Dual Band AMC (ADBAMC). The DBAMC succesfully excites additional resonance at 2.45 GHz outside the initial operating range of standalone CPW wideband antenna. Incorporation of DBAMC to antenna achieves back lobe suppression at 2.45 GHz and 5.8 GHz. The overall average gain of AMC incorporated antenna is improved from 2.69 to 6.29 GHz as opposed to the standalone reference CPW wideband antenna. Study of surface current is also presented and discussed.

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.

High-Q biquadratic notch filter synthesis using nodal admittance matrix expansion

2015 ◽  
Vol 69 (7) ◽  
pp. 981-987 ◽  
Author(s):  
Huu-Duy Tran ◽  
Hung-Yu Wang ◽  
Quoc-Minh Nguyen ◽  
Nan-Hui Chiang ◽  
Wei-Chun Lin ◽  
...  
Keyword(s):  
Notch Filter ◽  
High Q ◽  
Admittance Matrix ◽  
Filter Synthesis ◽  
Matrix Expansion ◽  
Nodal Admittance Matrix Expansion

Frequency reconfigurable antenna for cognitive radios with sequential UWB mode of perception and multiband mode of operation

2018 ◽  
Vol 10 (9) ◽  
pp. 1096-1102 ◽  
Author(s):  
Ali Mansoul ◽  
Farid Ghanem
Keyword(s):  
Narrow Band ◽  
Cognitive Radios ◽  
Dual Band ◽  
Uwb Antenna ◽  
Switch Operation ◽  
Resonance Frequencies ◽  
Mode Of Operation ◽  
The Mean ◽  
Conductive Strip ◽  
Good Agreement

AbstractIn this work, an UWB/narrow band reconfigurable elliptical-shaped monopole antenna for cognitive radio applications with sequential perception and operation modes is presented. The proposed approach consists in integrating a reconfigurable filter, in an UWB antenna ground plan, by the mean of four horizontal slots and integrated switches that allow inserting/removing/varying zeros and poles in the frequency response. By acting on the slot lengths in order to alter their resonance frequencies, the different switch configurations allow the antenna to switch between an UWB mode that could be used for the perception (sensing) and different narrowband modes, mono-band and dual-band, that could be used for the operation at 2.4 or/and 3.5 GHz. To validate the concept, an experimental prototype has been fabricated and a good agreement between the simulated and the measured S-parameters has been obtained. While the presented work uses the presence/absence of a perfect conductive strip (PEC) to model real switch operation, it is believed that the obtained results conjugated with previous work using real switches on a very similar structure allows validating approach.

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