EVALUATION OF THE EFFECT OF LENGTH ON THE PERFORMANCE OF RECTANGULAR TO RECTANGULAR WAVEGUIDE TAPER

Hasan F Khazaal ,Haider Th Salim Alrikabi ,Mansour S Farhan

doi:10.30772/qjes.v10i4.503

Hasan F Khazaal , Haider Th Salim Alrikabi + Show 1 more

Open Access

https://doi.org/10.30772/qjes.v10i4.503

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Abstract

RF Waveguide taper have a significant role in radar or communication systems through the use of it for joining two waveguides that have different cross sections, and this difference may be in dimensions of cross section or in the shape of it. the tapering may be from rectangular to rectangular waveguide (i.e. each waveguide operating at a certain frequency), or transition from rectangular to circular or elliptical waveguide. In this paper; two rectangular to rectangular waveguide tapers have been fabricated to join waveguide operating at C band frequencies with another one operating at X band frequencies. The fabricated tapers have the same shape but differ in length (8 cm, and 16 cm) in order to measure the effect of length on the most important parameters that have an effect on the performance of the taper, like voltage standing wave ratio VSWR, return losses, and input resistance. Many tests have been done using two - port network analyzer. The results of the tests indicate that there is no effect on the performance of the waveguide taper although there is an extra 8 cm in length.

Highlights

This RF waveguide transition or tapers are used to connect waveguide components with different cross sectional sizes and shapes
These tapers have difference in length but have the same cross section dimensions for corresponding ends, in order to check the effect of length on the most common characteristic, voltage standing wave ratio "Voltage standing wave proportion (VSWR)", return losses, and input resistance
The fabricated waveguide tapers are subjected to the following boundaries: - VSWR of the tapers ≤ 2. - High return losses as possible. - Input resistance near 50 Ohm

Summary

Introduction

This RF waveguide transition or tapers are used to connect waveguide components with different cross sectional sizes and shapes. Article Rectangular to rectangular waveguide tapers used to make transition between two different waveguide cross sections in order to mitigate some technical problems in connection and / or to reduce the cost of using new waveguides in a whole system. In order to satisfy the aim of this work, the fabrication of two rectangular to rectangular waveguide tapers have been done These tapers have difference in length but have the same cross section dimensions for corresponding ends, in order to check the effect of length on the most common characteristic, voltage standing wave ratio "VSWR", return losses, and input resistance.

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