Novel designs of polarization-preserving circular waveguide filters
نویسنده
چکیده
Novel designs of circular waveguide components for lowpass, highpass, bandpass, and bandstop applications are presented. The filters are formed by cascaded TM11-mode resonator sections which share a common axis, thus preserving the polarizations of input signals due to rotational symmetry. Moreover, the filters are smaller than standard TE11-mode bandpass filters. Basic design considerations are discussed with respect to the connection of TM11-mode resonators through circular irises. Design principles for all four filter types are presented and their performances computed by the coupled-integral equation technique (CIET). All filter performances are verified by the commercially available software package mWave Wizard, and structural dimensions are provided.
منابع مشابه
Circular Waveguide TM11-Mode Resonators and Their Application to Polarization-Preserving Bandpass and Quasi-Highpass Filters
Circular waveguide filters with improved performance are presented. They are based on TM11-mode resonators which permit the filter to be smaller than standard TE11-mode filters, preserve all polarizations due to rotational symmetry, and are flexible with respect to the design of bandpass or highpass filters. In order to demonstrate their advantages, they are compared to a standard TE11-mode des...
متن کاملDesign of Polarization-preserving Circular Waveguide Filters with Attenuation Poles
Bandpass filters in circular wa eguide technology are designed to ha e enhanced stopband responses. Highly dispersi e coupling sections are introduced to replace regular circular irises. The resulting direct-coupled resonator bandpass filters ha e the ad antage of preser ing the polarization of the incident excitation while pro iding sharp cutoff skirts. Attenuation poles at finite frequencies ...
متن کاملA New Circular Polarization Metamaterial Ferrite Phase Shifter
In this paper, a new X band Metamaterial (MTM) based ferrite phase shifter is presented. The phase shifter is excited by circular polarized wave base on combination of TE10 and TE01 modes in a square waveguide. In order to synthesize negative refractive index metamaterial (NIM), negative permeability of ferrite slabs in extraordinary mode is mixed with the negative permitivity of printed period...
متن کاملEnhanced Performance of Substrate Integrated Waveguide Bandstop Filter using Circular and Radial Cavity Resonator
Circular and Radial SIW cavity resonators are proposed to enhance the performance of SIW bandstop filter. Prior to this research work, rectangular cavity resonator was used to produce bandstop response. The design of the circular and radial SIW bandstop filters are done by directly coupling circular and radial cavity resonators to the SIW line. The SIW bandstop filters are designed to operate a...
متن کاملA Novel and Accurate Method for the Design of Dielectric
The development of numerical techniques now permits us to analyze complex structures such as dielectric resonator filters and planar passive elements for coplanar monolithic microwave integrated circuits. In this paper, we describe a novel method for designing dielectric resonator filters. Then a Chebychev band pass filter is designed by coaxially placing high-Q TM01Q dielectric resonators ...
متن کامل