Design of a Wide-Band Microstrip Filtering Antenna with Modified Shaped Slots and SIR Structure

• Published in: Inventions (Basel) Vol. 5; no. 1; p. 11
• Main Authors: Al-Yasir, Yasir I. A., A. Alhamadani, Hana’a, Kadhim, Ahmed S., Ojaroudi Parchin, Naser, Saleh, Ameer L., Elfergani, Issa T. E., Rodriguez, Jonathan, Abd-Alhameed, Raed A.
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.03.2020
• Subjects: chebyshev; computer simulation technology; fr-4; impedance bandwidth; lpf; microstrip filtering antenna
• ISSN: 2411-5134; 2411-5134
• DOI: 10.3390/inventions5010011

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.