Design of Pass Band Filter in Hybrid Architecture Planar/Non-Radiative Dielectric Waveguide Integration Technology

Tao Tao

doi:10.3844/ajassp.2012.1538.1541

Abstract

Problem statement: The expansion of RF, microwave and millimeter devices has revolutionized today's ommunication and sensor syst ems. Low-cost, high-performance and mass producible millimeter wave technologies are vital f or commercial broadband systems. Challenging issues are commonly faced in the design of low-loss integrated circuits for example high-Q band pass filter, which the planar technique is fundamentally limited in performance. Approach: In this study, we present a design of a nonradiativ e dielectric waveguide band pass filter based on hybrid architecture of micro strip line and non-radiative dielectric waveguide. Results: The simulation with High Frequency Structure Simulator (HFSS) three dimensional analyses is presented. Conclusion: The non radiative dielectric resolves most of the d rawbacks of dielectric waveguide in connection with the radiati on loss.

Highlights

This study aims to provide circuit designers with accurate, easy determinable for a pass band filter
Bacha has proposed the model of a hybrid integration of Non-Radiative Dielectric (NRD)-waveguide and micro strip line (Bacha and Wu 1998a; 1998b)
The NRD waveguide, consists of a rectangular-section dielectric rod sandwiched between two conducting plates that are at a distance apart less than half the freespace wavelength 20 (Fig. 1)

Summary

INTRODUCTION

Components, this design was described in (Cassivi et al, 2000; 2002). A non radiative dielectric waveguide is currently interesting filter types due to their high Q at low cost. MATERIALS AND METHODES technology for fabrication and compatibility with other technology Their electromagnetic models are still under research and not easy accessible. Bacha has proposed the model of a hybrid integration of NRD-waveguide and micro strip line (Bacha and Wu 1998a; 1998b). Other scheme of design called Engraved Non-Radiative Dielectric waveguide (ENRD), proposed to reduce the problem of alignment and mechanical tolerances in fabrication of NRD. The NRD waveguide, consists of a rectangular-section dielectric rod (height a, width b, permittivity εr1) sandwiched between two conducting plates that are at a distance apart less than half the freespace wavelength 20 (Fig. 1). The hybrid architecture planar/NRD waveguide integration geometry consist of a micro strip line deposited on the top of ground plane which is one of the two parallel metallic plates of the NRD wave guide. Corresponding Author: Harizi Hanen, Unit of Research Circuits and Electronics Systems High Frequency, Faculty of Science, University El ManarTunis, Tunisia 1538

The proposed structure of a design of pass band

CONCLUSION