Showing 1-25 of 5,638 resultsfor "Index Terms":Metallic Waveguide
"Index Terms":Metallic Waveguide
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This standard gives specifications for the waveguide (including aperture dimensions,frequency range, cut-off frequency, etc). This standard considers the tolerances of the waveguide aperture dimensions and the effect these have on the electrical properties (in terms of return loss, transmission loss, etc) of the waveguide.Show More
Evaluating Performance of 3D-Printed Metallic Rectangular mm-Wave and THz Waveguides
Himanshu Gohil;Stefan Pöss;Rihab Hamad;Peter Hunyor;Andreas Stöhr;Hui Wang;Peter Huggard;Andreas Klein
2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Year: 2024 | Conference Paper |
Rectangular Waveguides are standard RF interconnects, but are increasingly difficult to manufacture and align at higher frequencies. 3D printing, which is constantly improving, allows for intricate shapes and compact designs, thus offering potential for future high-frequency waveguides. This abstract evaluates the performance of metallic 3D printed rectangular waveguides made of steel at various f...Show More
Benchmarking electrical loss in rectangular metallic waveguide at submillimeter wavelengths
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)
Year: 2017 | Conference Paper |
Cited by: Papers (5)
A series of documentary standards has recently been published (the IEEE 1785 series) that provides specification details for rectangular metallic waveguides used at frequencies from 110 GHz to at least 3.3 THz. This includes values of electrical loss (both reflection and transmission) for these waveguides. However, the values specified in these standards are based on calculated (i.e. modelled) per...Show More
Comparison of Micromachined Dielectric and Metallic Waveguides for THz applications
Pekka Pursula;Matteo Cherchi;Antti Lamminen;Mikko Kantanen;Jaakko Saarilahti;Vladimir Ermolov
2018 11th Global Symposium on Millimeter Waves (GSMM)
Year: 2018 | Conference Paper |
The paper considers micromachined dielectric and metallic waveguides for THz applications. Analytical analysis and simulation of losses for ideal structures are provided. Effect of fabrication nonidealities, such as surface roughness is also considered. In dielectric waveguide, the dielectric losses are the main loss mechanism, and Silicon tan8 is low above 1 THz, but increases rapidly at lower fr...Show More
Specifications for rectangular waveguide interfaces are given in this standard. It considers the tolerances of the waveguide interface dimensions and the effect these have on the electrical properties (in terms of reflection coefficient) of the waveguide.Show More
Electron Acceleration Inside a Circular and Elliptical Plasma Waveguide With Metallic Rod
In this paper, the electron acceleration by microwave radiation inside a cold plasma-filled circular and elliptical waveguide with metallic rod is studied. By applying the boundary condition on the waveguide the field components of the TMmr mode are obtained. The deflection angle of electron is calculated. The relativistic momentum and energy equations for an electron are solved, and the accelerat...Show More
Liquid Waveguide Antenna
2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting
Year: 2019 | Conference Paper |
Cited by: Papers (1)
A novel concept of liquid waveguide antenna (LWA) is proposed in this paper. An X-band liquid rectangular waveguide is demonstrated as an example for concept verification. A hollow-wall dielectric rectangular waveguide with standard aperture size is firstly designed and realized by 3-D printing technique. Subsequently, two rectangular metal rings are employed to seal the two waveguide ports so as ...Show More
Novel Air-Filled Waveguide Transmission Line Based on Multilayer Thin Metal Plates
This paper presents a novel way of constructing waveguiding structures by stacking several thin metal plates for millimeter-wave and terahertz applications. The metallic layers do not require any electrical contacts among them. An air-filled multi-layer waveguide (MLW) transmission line is successfully designed and manufactured at D-band. Five vertically stacked thin metal layers are used to form ...Show More
Design and Characterization Low-Loss Modes in Dielectric-Coated Hollow-Core Waveguides at THz Frequency
Journal of Lightwave Technology
Cited by: Papers (4)
Designs of hollow-core rectangular, circular, and elliptical waveguides with inner coating of silver and polystyrene (PS) are presented for low-loss terahertz guidance. The PS thickness deposited over silver is optimized to achieve the lowest possible loss for each waveguide at the frequency of 2.5 THz. The mode also tends to be a near-Gaussian in shape, easy for coupling to transmitter and receiv...Show More
In this paper, we propose to use a wedge-shaped plasmonic waveguide with a metallic double-layer structure for improving the propagation length of surface plasmon polaritons. The wedge silicon waveguide is covered by a first layer of Ag and by a second layer of Au outermost in which the former has a good lightwave guiding property but unstable to the operating medium and the latter is more stable ...Show More
Characterization of micromachined silicon rectangular waveguide at 400 GHz
We present the first characterization of a micromachined silicon rectangular waveguide at 400GHz. The silicon waveguide has an average loss of 0.086dB/mm for a range of 350-460GHz. The waveguides are formed using well known microfabrication techniques and demonstrate a successful first step towards the use of silicon waveguides as a viable option for THz systems.Show More
W-band Microstrip-to-Waveguide Transition without Back-short Structure
2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT)
Year: 2021 | Conference Paper |
Cited by: Papers (5)
A W-band microstrip-to-waveguide transition without back-short structure is presented in the article. It consists of three parts, which are the microstrip line, the coupling-matching structure, and the rectangular waveguide. The planar coupling-matching structure replaces the coupling probe and the back-short end in the traditional waveguide. So this microstrip-to-waveguide transition is fairly co...Show More
A CPW Excitation Using a Contactless Dielectric Waveguide Probe for the V-Band
Amr Samir;Mohamed Basha;Ahmed M. Hegazy;Safieddin Safavi-Naeini
In this paper, a design of V-band 50-75GHz millimeter-wave transition from coplanar waveguide (CPW) to dielectric rectangular waveguide (DWG) is presented for contactless measurement probe device. The aim of the probe is measuring CPW-based technology integrated systems without direct contact. The proposed design is based on high resistivity silicon wafer to implement the DWG and a laser machined ...Show More
MMIC-to-waveguide transition at 160 GHz with galvanic isolation
Martin Hitzler;Stefan Saulig;Linus Boehm;Winfried Mayer;Christian Waldschmidt
2016 IEEE MTT-S International Microwave Symposium (IMS)
Year: 2016 | Conference Paper |
Cited by: Papers (13)
In this paper a new approach for a monolithic microwave integrated circuit (MMIC) to rectangular waveguide transition is presented, which has no need for a specific package. The transition uses a partly integrated antenna with a patch radiator and a tapered dielectric waveguide to guide the wave into a widened metallic waveguide. Due to the usage of the dielectric waveguide the ground potentials o...Show More
Propagation Constant Measurement in Two Dimensional Post Array Waveguide with Triangular Lattice by Metallic Pillars
2014 Ninth International Conference on Broadband and Wireless Computing, Communication and Applications
Year: 2014 | Conference Paper |
In this paper, propagation characteristics of post array waveguides were measured by using microwave scale model. From phase measurement along with the waveguide by inserting a probe, phase as a function of propagation distance could be evaluated. The propagation characteristics were compared with numerical simulation by CIP method, to show good agreement for typical frequencies. From comparison o...Show More
Design of Broadband Gap Waveguide Transitions for Millimeter-Wave Antenna Arrays
Miguel Ferrando-Rocher;Daniel Sanchez-Escuderos;Jose I. Herranz-Herruzo;Alejandro Valero-Nogueira
This paper presents two novel transitions in gap-waveguide technology. The first transition, a rectangular waveguide to groove-gap waveguide in the V band, shows a return loss better than 15 dB within a 15% bandwidth. The second transition, a rectangular waveguide to ridge-gap waveguide in the Ka band, exhibits 20% bandwidth with a return loss level above 20 dB. These transitions are aimed to serv...Show More
Design of Broadband Gap Waveguide Transitions for Millimeter-Wave Antenna Arrays
Miguel Ferrando-Rocher;Daniel Sánchez-Escnderos;Jose I. Herranz-Herruzo;Alejandro Valero-Nogueira
This paper presents two novel transitions in gap-waveguide technology. The first transition, a rectangular waveguide to groove-gap waveguide in the V band, shows a return loss better than 15 dB within a 15% bandwidth. The second transition, a rectangular waveguide to ridge-gap waveguide in the Ka band, exhibits 20% bandwidth with a return loss level above 20 dB. These transitions are aimed to serv...Show More
Cross Polarization in Large-scale Rectangular Waveguide Slot Array Antenna with Parallel Metallic Plates
2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
A part of constructed large-scale waveguide slot array antenna ultilized in Surface Monitor Radar(SMR) is proposed in this thesis, to which slotted rectangular waveguide with parallel metallic plates in this narrow-beam antenna is applied in order to restrain cross-polarization and obtain relative pure linear polarization so that excellent radiation performance is guaranteed. However, it is figure...Show More
Metallic 3D Printed Rectangular Waveguides (WR3) for Rapid Prototyping of THz Packages
Sumer Makhlouf;Besher Khani;Jörg Lackmann;Sebastian Dülme;Andreas Stöhr
2018 First International Workshop on Mobile Terahertz Systems (IWMTS)
Year: 2018 | Conference Paper |
Cited by: Papers (7)
In this work, laser beam melting (LBM) is used for direct 3D printing of hollow-metallic rectangular waveguides (WRs) within the WR3-band (230-320 GHz). By using laser beam melting of stainless steel (SS) 316L powder, a WR3 waveguide is fabricated in a single 3D printing process. This eliminates the need for costly mechanical and chemical post-printing processes required in traditional micromachin...Show More
Advanced modeling and design of substrate integrated waveguide components
2014 IEEE International Wireless Symposium (IWS 2014)
Year: 2014 | Conference Paper |
Cited by: Papers (4)
This paper presents some recent advances in the electromagnetic modeling and design of substrate integrated waveguide (SIW) components. The modeling of losses in SIW structures is discussed in details, and a new formula for the calculation of the attenuation constant due to radiation loss is introduced. In addition, an efficient technique for the modeling of arbitrarily shaped SIW components is di...Show More
This article proposes a groove gap waveguide (GGW) for terahertz (THz) applications. At first, a metal unit cell is introduced, which shows a bandgap frequency range of 1-2 THz. The metal pins are surrounded by benzocyclobutene (BCB) polymer to facilitate the fabrication process. The GGW with a width of 133.40 μm has a cutoff frequency of 1.2 THz. A multimode interference (MMI) power divider is al...Show More
Parametric Analysis of Wideband Substrate Integrated Waveguide Structure with Negligible Loss for High Power Application
2022 IEEE International Conference of Electron Devices Society Kolkata Chapter (EDKCON)
Year: 2022 | Conference Paper |
Substrate integrated waveguide with insignificant loss is theoretically designed at X and Ku band with cutoff frequency 9.16 GHz. Very high return loss speaks in favor of the proposed design, and that is also increasing as progressed towards X to Ku band. Impedance variation with wavelength exhibits monotonic decreasing behavior for different effective width, which voices for higher width within p...Show More
Novel Broadband Transition for Rectangular Dielectric Waveguide to Planar Circuit Board at D Band
Wan-Ling Tsai;Ilja Ocket;Joren Vaes;Maarten Cauwe;Patrick Reynaert;Bart Nauwelaers
2018 IEEE/MTT-S International Microwave Symposium - IMS
Year: 2018 | Conference Paper |
Cited by: Papers (8)
This paper demonstrates a D-band transition between a coplanar waveguide line and a rectangular dielectric waveguide> The transition uses an intermediate metallic waveguide partially implemented on printed circuit board (PCB) to enhance the coupling efficiency and to offer a solid assembly base. The transition was designed to convert the CPW mode to the \pmbE11y mode in a dielectric rectangular wa...Show More
Analysis of coplanar-to-rectangular waveguide transition at D-band for UTC-PD THz source
Caixia Wang;Yuan Yao;Limei Qi;Zhijiao Chen;Junsheng Yu;Xiaodong Chen
2018 IEEE MTT-S International Wireless Symposium (IWS)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
This letter presents a broadband coplanar-to-rectangular waveguide transition using E-plane stepped probe for unitraveling carrier photodiode (UTC-PD) THz source application. The electromagnetic wave propagates from the CPW, and then radiates from the probe into the rectangular waveguide. A window is opened in parallel with the H-plane of the WR-6 waveguide. A stepped probe connecting to the end o...Show More
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