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SIW-DGS bandpass filter design for C band satellite communications

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Abstract

In this paper, a bandpass filter is designed and fabricated for C-band satellite communication applications. The substrate integrated waveguide and defected ground structures are used in the design process. CST Microwave Studio software is used to analyze and design the proposed filter. It is built over DiClad 880 laminate having a thickness of 0.508 mm, and formed by etching three cascaded DGS cells on the SIW’s top plane. There is a good agreement between the simulated and measured results. The filter is centered at 6.175 GHz with 500 MHz bandwidth (8.1% fractional bandwidth) in line with applicable US Federal Communications Committee Rules. The simulated insertion loss at the center frequency is around 0.80 dB and the return loss in the passband is better than 30 dB. The measured minimum insertion loss is 1.4 dB, and the measured return loss in the passband is better than 14.5 dB. The obtained results are presented, discussed, and compared with other studies. It can be said that the features of the proposed filter such as size, order, return loss, insertion loss, upper band rejection, etc. are better than those of many other filters given in the literature.

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Acknowledgments

This study is related to the MSc thesis of Mohammed Nasser and is supported by the Akdeniz University Scientific Project Support Unit under the grand numbers FYL-2020-5103 and FYL-2020-5111. We also would like to thank Akdeniz University EMUMAM directorate that all facilities used in this study were granted by the State Planning Organization - Turkey (Grant Number: 2007K120530-DPT).

Author information

Authors and Affiliations

  1. Department of Electrical and Electronics Engineering, University College Cork, Cork, Ireland

    Mohammed Nasser

  2. Department of Electrical and Electronics Engineering, Dicle University, Diyarbakir, Turkey

    Ali Recai Celik

  3. Department of Electrical and Electronics Engineering, Akdeniz University, Antalya, Turkey

    Selcuk Helhel

Authors
  1. Mohammed Nasser
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  2. Ali Recai Celik
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  3. Selcuk Helhel
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Corresponding author

Correspondence to Ali Recai Celik.

Appendices

Abbreviations

BPF:

Bandpass Filter

BW:

Bandwidth

C-band:

Frequencies Ranging from 4.0 to 8.0 Gigahertz

CST:

Computer Simulation Technology

DGS:

Defected Ground Structure

FCC:

Federal Communications Committee

FSS:

Fixed Satellite Service

FS:

Fixed Service

IL:

Insertion Loss

RF:

Radio Frequency

RL:

Return Loss

SIW:

Substrate Integrated Waveguide

SMA:

Sub-Miniature Version A

TE:

Transverse Electromagnetic

TL:

Transmission Line

TM:

Transverse Magnetic

WiMAX:

Worldwide Interoperability for Microwave Access

3D:

Three-Dimensional

List of symbols

dB:

Decibel

GHz:

Giga (109) Hertz

Hz:

Hertz (1/second)

MHz:

Mega (106) Hertz

mm:

Millimeter

nH:

Nanohenry

ns:

Nanoseconds

pF:

Picofarad

\(\lambda_{c}\) :

Cut-off Wavelength

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Nasser, M., Celik, A.R. & Helhel, S. SIW-DGS bandpass filter design for C band satellite communications. Sādhanā 48, 55 (2023). https://doi.org/10.1007/s12046-023-02099-y

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  • DOI: https://doi.org/10.1007/s12046-023-02099-y

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