Design of a wide-band microstrip filtering antenna with modified shaped slots and sir structure

Yasir I.A. Al-yasir, Hana’A A. Alhamadani, Ahmed S. Kadhim, Naser Ojaroudi Parchin, Ameer L. Saleh, Issa T.E. Elfergani, Jonathan Rodriguez, Raed A. Abd-alhameed

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
38 Downloads (Pure)


This paper presents a new compact microstrip filtering antenna with modified shaped slots to improve the impedance bandwidth. The proposed microstrip filtering antenna consists of three parts: the monopole radiating patch antenna; the Stepped Impedance Resonator (SIR) filter; and the feeding microstrip line. The designed structure is achieved on one-sided glass epoxy FR-4 substrate with dielectric constant εr = 4.4 and thickness h = 1.6 mm. The design procedure of the proposed filtering antenna starts from the second-order Chebyshev low pass filter (LPF) prototype. The achieved results show an excellent performance of S11-parameter with broadside antenna gain on +z-direction. Having two transmission zeros at 5.4 GHz and 7.7 GHz, good skirt selectivity and a wide-band impedance bandwidth of about 1.66 GHz makes the designed filtering antenna suitable for high-speed data communications. Both the simulation results generated by using the Computer Simulation Technology (CST) software package and the measurement achieved by using a vector network analyzer (HP 8510C) and the anechoic chamber show good agreement.

Original languageEnglish
Article number11
Issue number1
Publication statusPublished - 24 Feb 2020
Externally publishedYes


  • Chebyshev
  • Computer simulation technology
  • FR-4
  • Impedance bandwidth
  • LPF
  • Microstrip filtering antenna


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