Cold Test Validation of Metamaterial Based Rectangular Slow Wave Structure for High-Power Backward-Wave Oscillators

Date

2019-06-01

Author

Eser, Dogancan
Demir, Şimşek

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

267
views

0
downloads

In this paper, a novel S band metamaterial based rectangular slow-wave structure (RSWS) is proposed for high-power backward-wave oscillator (BWO). The circular waveguide is loaded with R-SWS that shows negative permittivity and permeability. Since RSWS shows negative permittivity and permeability which is the key characteristics of metamaterial, it can operate below the cut-off frequency. CST Studio Suite is used to analyze high frequency characteristic of SWS. Dispersion diagram of the unit cell is observed with Eigen Mode Solver which is dedicated to simulation of closed resonant structures. Interaction impedance of the unit cell is also observed. Since the beam-wave interaction occurs with TM mode, axial and absolute electric field are observed in simulation. Slow wave structure composed of 8 unit cell is fabricated and measured in network analyzer. Cold-Test measurement validates the TM mode propagation of RSWS. BWO based on this RSWS is shown to operate at 2.49 GHz with 23.8 % peak efficiency for 2 T magnetic field by using CST Particle Studio.

Subject Keywords

Backward-wave oscillator (BWO), Dispersion Diagram, Interaction Impedance, Metamaterial, Reversed Cherenkov Radiation, Slow wave structure (SWS)

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081626489&origin=inward
https://hdl.handle.net/11511/95389

DOI

https://doi.org/10.1109/ppps34859.2019.9009803

Conference Name

2019 IEEE Pulsed Power and Plasma Science, PPPS 2019

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Dual-band high-frequency metamaterial absorber based on patch resonator for solar cell applications and its enhancement with graphene layers Ustunsoy, Mehmet Pasa; Sabah, Cumali (2016-12-05) In this paper, a dual-band high-frequency metamaterial absorber based on patch resonator is designed and analyzed for solar cells. In order to obtain a metamaterial absorber, metal-semiconductor-metal layers are combined. The results of the designed structure are shown in the infrared and visible ranges of solar spectrum. Structural parameters and dimensions of the device have a significant importance on the performance of the designed absorber. The simulations are carried out with full-wave electromagnetic...
Time-domain mapping of electromagnetic ray movement inside anisotropic spherical resonator Biber, A; Golick, A; Tomak, Mehmet (2002-09-01) This paper presents the analytical proof of "Time-Domain Mapping Method" for the spherical resonator made up of uniaxial crystal. In this way, the main types of caustics inside the spherical resonator made up of uniaxial crystal, which were investigated numerically before, are confirmed analytically. It is engraved that the problem of the ray flow inside the spherical resonator can be reduced to the problem of the ray flow inside metal cavity shaped as spheroid.
Multi-Band Metamaterial Absorber: Design, Experiment and Physical Interpretation Dincer, F.; KARAASLAN, MUHARREM; ÜNAL, EKİN ANIL; Akgol, O.; Sabah, C. (2014-03-01) This paper presents the design, fabrication, characterization and experimental verification of a perfect Multi-Band Metamaterial (MTM) absorber (MA) based on a simple configuration of a rectangular resonator and strips operating in microwave frequency regime. The proposed multi-band MA provides perfect absorption with TE-incident angle independency. Maximum absorption rate is achieved as 99.43% at 5.19 GHz for simulation and 98.67% at 5.19 GHz for experiment, respectively. The measurement results of the fab...
Multi-band metamaterial absorber topology for infrared frequency regime Mulla, Batuhan; Sabah, Cumali (2017-02-01) In this paper, a new multiband metamaterial absorber design is proposed and the numerical characterization is carried out. The design is composed of three layers with differently sized quadruplets in which the interaction among them causes the multiband absorption response in the infrared frequency regime. In order to characterize the absorber. and explain the multiband topology, some parametric studies with respect to the dimensions of the structure are carried out and the contributions of the quadruplets ...
Analysis and design of slotted substrate integrated waveguide antenna on cylindrical surface Bayraktar, Ömer; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2014) This thesis presents novel traveling wave conformal shunt slot arrays on cylindrical substrate integrated waveguide (CSIW) placed on a cylindrical surface in the circumferential direction at K-band. Mutual couplings of longitudinal slots on broad wall of CSIW are formulated and active admittance formulas of the slots are derived which are used in Elliott’s design procedure to design slotted CSIW arrays. The designs are carried out at 25 GHz using non-uniform and uniform slot separations. The non uniform slo...

Citation Formats

D. Eser and Ş. Demir, “Cold Test Validation of Metamaterial Based Rectangular Slow Wave Structure for High-Power Backward-Wave Oscillators,” Florida, Amerika Birleşik Devletleri, 2019, vol. 2019-June, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081626489&origin=inward.