Parametric Analysis of the Defected Ground Structure-Based Hairpin Band Pass Filter for VSAT System on Chip Applications

N Ambati,M S Prapurna,J Yanapu,G Immadi,K R Bareddy,M V Narayana

doi:10.48084/etasr.4495

Abstract

In this study, a three-pole hairpin structure was fabricated on the top of the substrate material and an open loop microstrip structure at the ground to give a modified triple-band BPF with a unique design. A Rogers (RT5880) material with εr = 2.2 and thickness of 1.27mm was used to fabricate the proposed structure. The space between two consecutive hairpin resonators has different distances d1 and d2 with values of 0.2mm and 0.4mm respectively. The proposed filter offers a compact size with low return loss. The equivalent LC circuit of the DGS and hairpin structure is obtained with the Ansys electronic desktop and by using simple circuit analysis. The desired microstrip triple-band BPF operates at the Ku band, resonates at 10.28GHz, 12GHz, and 14.62GHz, while the simulated and experimental results are almost identical. The proposed wideband BPF satisfies the International Telecommunication Union ((ITU) region 3 spectrum requirements. Direct Broadcast Service (DBS) and Fixed Satellite Service (FSS) in transmit mode respectively employ the frequency band 11.41-12.92GHz and 14-14.5GHz.

Highlights

International Telecommunication Union (ITU) has divided the world into three zones for satellite applications in order to efficiently organize the spectrum
The three transmission zeros at the pass band frequency spectrum are obtained by the hairpin resonators and dual armed microstip open loop transmission resonators present in the filter
The filter's return loss and insertion loss characteristics are detailed in Figure 7 and the reflection coefficient is below 10dB

Summary

INTRODUCTION

International Telecommunication Union (ITU) has divided the world into three zones for satellite applications in order to efficiently organize the spectrum. Iteration 0 is the basic microstrip transmission line with a length and width of 15.45mm and 0.75mm. It is designed by using Ansoft HFSS. In iteration 1, a single hairpin structure is designed on the top of the substrate and is fed by a microstrip transmission line. The proposed design is designed to operate at 12GHz. The three transmission zeros at the pass band frequency spectrum are obtained by the hairpin resonators and dual armed microstip open loop transmission resonators present in the filter

Evolution The step by step procedure of the proposed hairpin line

Filter Analysis

RESULTS AND DISCUSSION

CONCLUSION