Paper Title
Enhanced compact Hairpin Bandpass Filter with cross shaped and spiral shaped DGS using High Dielectric Constant Laminate Substrate and Superstrate for 6G Communication

Abstract
Hairpin bandpass filters are one of the most demanding types of bandpass filters used in RF/microwave applications for regulating frequency responses.In this research to remove the unwanted harmonics that disturb the filter operation and to increase the performance of the filter, a novel Hairpin Bandpass Filter with cross shaped and spiral shaped DGS based Optimization has been proposed in which cross shaped and spiral shaped DGS structure has been placed in the input and output feedline of hairpin filter to provide smooth passband characteristics and wide stopband characteristics and the placement of Double Square Split Ring Resonator in both the input and output feedline of the hairpin filterincreases the quality factor. Inorder to increase the performance of the hairpin filter while maintaining the compact size, a high dielectric constant laminate substrate and superstrate has been used which reduces the losses in humid environment. Arlon AD1000 material has been used in this design. The simulation in this paper is carried out using the High-Frequency Structure Simulator (HFSS) software. The proposed filter design improves the performance in a compact size with low insertion lossand provide excellent spurious passband suppression. Keywords - Hairpinbandpass filter, DGS based Optimization, Cross shaped DGS, Spiral shaped DGS, Double Square Split Ring Resonator, High dielectric constant laminate substrate and superstrate