2024 Folded waveguide

Folded waveguide

Author: wsou

August undefined, 2024

WebThe folded waveguide (FWG) antenna is an advanced Cyclotron Range of Frequencies launcher being designed at Oak Ridge National Laboratory in collaboration with … Webat the waveguide has been achieved using a movable coaxial transmission line feed. Bench-top comparisons with loop antennas have been made. The folded waveguide coupler will be mounted on the Radio Frequency Test Facility for high-power tests up to 1.5 MW. INTRODUCTION A general description of the folded waveguide coupler concept …

Micromachining and Characterisation of Folded Waveguide Structure …

WebNov 10, 2024 · To realize the miniaturization of E-band traveling-wave tubes (TWTs), the size analysis and optimization design were carried out based on an improved cosine-vane folded waveguide (CV-FWG) slow-wave structure (SWS) that operates in a low voltage. In addition, a novel miniaturized T-shaped coupler was proposed to achieve a good voltage … WebNov 12, 2024 · A W-band folded waveguide with a total of 80 periods was designed for a traveling-wave-tube (TWT) amplifier operating at 90 GHz–100 GHz. The measured return loss and insertion loss of the W-band fabricated circuit were–10 dB and 0.42 dB/cm, respectively. A G-band circuit showed a higher insertion loss of 1.57 dB/cm. top talent group

JP2015091032A - Folded waveguide - Google Patents

WebDec 1, 2024 · A layer coupler was used to connect the arrayed waveguides of the AWG to the Si loop reflector. The folded AWG consisted of a half Si 3 N 4 AWG structure, an … WebThe folded waveguide according to the present invention includes an input side waveguide and an output side waveguide configured by arranging hollow waveguides having a … top talent images

Substrate integrated folded waveguides (SIFW) and filters

WebMay 10, 2024 · The ridge waveguide is an important transmission line for broadband communication systems. This reduces the size of the filter. Then fold this filter along the center coordinates. It has no coupling or tuning screws. A full-wave simulator has been employed for designing the filter. WebMar 3, 2009 · The periodic nonuniform folded waveguides are special structures, the physical dimension of which is between the periodic folded waveguide and the tapering period folded waveguide.... top talent insightsWebNov 7, 2024 · E-plane ridge. Combined with the initial parameters of folded waveguide, a tapered double ridge loaded folded waveguide slow wave structure with center frequency of 0.34THz is designed. The structural parameters are shown in table 1. Table 1. Design parameters of tapered double ridge loaded folded waveguide slow wave structure. top talent indianapolis

"WebSep 9, 2024 · Folded waveguide (FW) is a promising type of slow-wave structure (SWS) for millimeter-wave traveling-wave tubes. Results of development of several millimeter-band FW SWSs are presented. SWS... " - Folded waveguide

Folded waveguide

WebSep 9, 2014 · Design of RF structure for W-band folded waveguide traveling-wave tube was accomplished using electromagnetic simulation codes CST-MWS and GdfidL. The parameters characterizing the folded waveguide structure were optimized through a detailed analysis. CST-MWS and GdfidL simulated dispersion results have been … WebSep 1, 1998 · The folded-waveguide slow-wave structure (SWS) is a robust beam-wave interaction circuit for millimeter-wave traveling-wave tubes. We applied a particle-in-cell …

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WebJul 20, 2003 · A folded waveguide (FW) is a promising slow-wave structure (SWS) for millimeter-wave traveling-wave tubes (TWTs) with the advantages of high power and … WebJul 30, 2024 · 2.1 Investigation of Folded Waveguide Interaction Circuits A folded waveguide is a kind of periodic slow-wave circuit [ 12 ]. It is formed by bending of rectangular waveguide along the electric field surface with …

WebOct 1, 2024 · Abstract To gain higher power with a lower cathode current density and a simpler structure, a novel rectangular beam folded waveguide traveling-wave tube (RB-FW-TWT) operating at 220 GHz is... WebMay 26, 2024 · Abstract: Folded Waveguide (FW) Traveling Wave Tubes (TWT) is a kind of high frequency, high power, and moderate bandwidth slow-wave structures. In many applications, FWTWT is a seductive choice. Such as radars, communication systems and electron counter measure.

WebApr 1, 2024 · The influence of the surface roughness and conductivity of the waveguide on the loss of the high frequency circuit is considered. In order to improve the efficiency of the beam wave interaction, the two kinds of slow wave structures of the folded waveguide TWT are designed by using the variable period technology. WebA waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting the transmission of energy to one direction.Without the physical constraint of a …

WebNov 26, 2015 · Alternating-phase-fed waveguide slot arrays were then proposed to implement broadband resonant characteristics [ 9, 10 ]. This feeding scheme also removes the need for folded shorts because the shorting wall is located only one-quarter of a wavelength from the last slots in the feeding waveguide.

WebApr 11, 2024 · Based on this material, a spot size converter that expands the transverse electric (TE) mode field profile from a 0.5 µm wide silicon wire waveguide to a 15 µm wide waveguide within a length of ... top talent management agency mumbaiWebDec 1, 2010 · 1.. IntroductionRectangular folded-waveguide (RFW) slow-wave structures (SWS) became popular for millimeter-wave traveling-wave tubes (TWTs) for its potential for reasonable bandwidth along with its capability of high power operation and ease of fabrication [1], [2].However, analytical approaches available for the computation of slow … top talent managers in hollywoodWebJun 1, 2014 · The folded waveguide (FWG) is a rectangular waveguide folded in a serpentine shape (Figure 19 (a)) to reduce the axial phase velocity of the EM wave to have synchronism with the electron beam... top talent management consulting firmsWebA wideband folded waveguide traveling-wave tube (TWT) amplifier has advantages of simpler coupling structures and robust structure over the conventional helix TWT. The phase velocity of waves in folded waveguide is slowed down to the velocity of electron beam. top talent management softwareWebMar 31, 2024 · A W-band folded waveguide with a total of 80 periods was designed for a traveling-wave-tube (TWT) amplifier operating at 90 GHz–100 GHz. The measured return loss and insertion loss of the W-band ... top talent ocps 2022WebDec 16, 2016 · The folded-waveguide slow-wave structure along with input-output couplers and RF windows were fabricated. Cold test measurements were carried out for … top talent ocpsWebNov 10, 2024 · Compared to the helix slow-wave structure (SWS), folded waveguide (FWG) SWS is widely used in millimeter waves. Otherwise, the transverse size of the … top talent profile