# waveguide flanges

** New formulas for the reflection coefficient of an open-ended rectangular waveguide radiating into air including the effect of wall thickness or flange **

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New formulas are presented for the reflection coefficient at the open end of a rectangular waveguide radiating into air including the effect of wall thickness or flange . Existing formulas require significant amount of numerical calculations and do not cover the practical range of

** RF Test Results of Choke Flange for High Power Waveguide Valve**

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We need a waveguide valve with a peak rf power handling capability of 80 MW or more to reduce the replacement time of klystron tubes in the PLS linac. So we designed a wave- guide valve and made two prototypes. However, they have some problems caused by rf The problem of TEM-wave radiation from a coaxial waveguide with an infinite flange and thick inner conductor terminating in the plane of the flange is considered. Solution by the Wiener–Hopf–Fok method reduces to solution of an infinite system of linear algebraic

** Analysing Waveguide Flange for High Power Waveguide Systems by using Cavity Structure**

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In this paper, waveguide flange for high power waveguide systems are presented. To prevent breakdown problem due to the small groove for gasket, its location is changed to the outside of the groove for rubber O-ring. Rectangular cavity is fabricated and measured to The accuracy of modern etalon and standard measurement facilities for microwave circuit parameters (impedance, attenuation, noise and energy characteristics) is such that the fact waveguide connections are not ideal (the presence of reflections, losses, nonreproducibility The accuracy of modern standards and reference devices used in microwave measurements (impedance, attenuation, noise, and power) is so high that even slight imperfections in waveguide joints (reflection, attenuation, and their nonrepeatability when waveguide ele- ments are dismantled

** The ring-centered waveguide flange for submillimeter wavelengths**

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is not well suited for frequency bands above~ 110 GHz. The proposed ring-centered flange has a precisely machined boss centered on the waveguide aperture and is aligned by a ring which centers the bosses of two mating flanges. The flange is The reflection coefficient is determined for the Hit mode in a circular waveguide radiating from an aperture with an infinite flange . The calculations are carried out for various values of the permittivity of the medium outside the aperture, which, in general, differs from that inside The new dielectric waveguide diplexer as an alternative to the conventional waveguide diplexer is presented. Crystalline quartz is employed as the dielectric material because of its ultra low loss. The quality factor of the dielectric waveguide resonator becomes 2,000 at

** Modeling of Rectangular Waveguide without Infinite Flange **

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To model an open ended waveguide radiating in the free space, we usually consider it as a waveguide opened in an infinite metal flange in order to eliminate the rear radiation. In this work another approach is proposed for modeling it without flange . The basic idea is to use a Methods of analyzing the dynamic characteristics of finite waveguide grids with an ideally conducting flange have been developed fairly well [1, 2]. The problem of determining the matching characteristics and mutual coupling of a finite waveguide grid with an impedance

** Recommendations for flat and anti-cocking waveguide flanges **

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As discussed in ALMA Memo 278 , flat and anti-cocking1 waveguide flanges are preferred over the common Mil-F-3922/67B (UG-387 and-383) type of flange with its central boss. While flat and anti-cocking flanges are in many ways similar to the/67B flange, there are

** Waveguide flanges for ALMA instrumentation**

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In many waveguide bands more than one MIL Spec standard flange is available. Flat and anti-cocking flanges , compatible with certain MIL Spec flanges , are increasingly widely used. Alignment tolerances on standard flanges are acceptable for most practical

** Beam-forming capabilities of waveguide feeds assisted by corrugated flanges **

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The physical mechanisms behind the formation of shaped-beam radiation patterns by flat horns (ie open ended waveguide feeds with finite-size corrugated flanges ) are studied in a rigorous manner using the singular integral equation approach. The problem is considered

** IMPROVED MILLIMETER WAVEGUIDE FLANGES IMPROVED COMPONENT AND MEASUREMENTS**

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The current UG383/U flange is shown in Figure 1a. The principal features include a four-pin indexing pattern for alignment with two press-fit pins and two clearance holes on each flange, at a 45 angle to the waveguide aperture; raised boss in the center around the