Design and Improvement of Compact Half-Wavelength Band Pass Filter Employing Overlapped Slotted Ground Structure (SGS) and Multilayer Technique

作者：Boutejdar A^*; Darwish A; Omar A

来源：Applied Computational Electromagnetics Society Journal, 2013, 28(8): 685-692.

• Band pass filter
• compactness
• multilayer
• slotted ground structure

This paper deals with a compact Chebyschev 3rd hairpin band pass filter design, using the Richards-Kuroda transformation method. Afterwards, a combination of slotted ground structure (SGS) and multilayer technique is applied. Filters using quarter-wavelength stepped-impedance resonator without and with SGS technique are investigated. Finally, two band pass filters are designed, simulated, and partially measured. A compact SGS band pass filter operated at 4.35 GHz is demonstrated. The proposed band pass filter has low insertion loss, high rejection in both the stop bands and a compact size of (20 x 23) mm(2) (0.075 lambda g x 0.058 lambda g) with a guide wavelength lambda g = 0.359 m. Additionally, the structure has generated two transmission zeros on both sides of the pass band at 3.1 GHz and 4.9 GHz. The simulated results as well as the experimental results are satisfactory with the filter requirements. The introduced structure can be a good alternative to a conventional parallel-coupled half wavelength, as well as quarter-wavelength stepped-impedance resonator band pass filter.

• 出版日期2013-8