Band-Notched Dual-Polarized Antennas for 2G/3G/4G/5G Base Station Using the GCPW DGS-DMS Hybrid Filter

• Published in: IEEE access Vol. 12; p. 1
• Main Authors: Li, Min, Li, Daotong, Xu, Chongcai, Li, Haixia, Xu, Feng
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.01.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 3G mobile communication; 4G mobile communication; 5G mobile communication; Band-notched; Bandstop filters; base station; Base stations; Broadband; Broadband antennas; Broadband communication; Coplanar waveguides; DGS; Dielectric substrates; Dipole antennas; DMS; Dual band; Dual polarization (waves); dual-polarized; Ground support; Microstrip filters; Notch filters; Polarization; Radiation; Radiators; Substrates
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2024.3373702

Two broadband dual-polarized band-notched crossed dipole antennas based on the grounded coplanar waveguide (GCPW) filter for 2G/3G/4G/5G base station are proposed in this paper. Two antennas with two and three radiation nulls are displayed to demonstrate the design innovation. Firstly, a wideband crossed dipole antenna with GCPW feed structure is designed, and its coverage frequency is 1.7-3.6 GHz. Then, a compact GCPW second-order hybrid bandstop filter is designed using defected ground structure (DGS) and defected microstrip structure (DMS). The DGS-DMS filter are embedded inside the antenna radiator to achieve the stopband covering 2.9-3.1 GHz with only one dielectric substrate. At last, a miniaturized GCPW third-order DGS-DMS highly selective bandstop filter is integrated in wideband antenna to realize the stopband of 2.87-3.17 GHz. The proposed band-notched antenna uses only one substrate. Compared with the antenna using second-order filter, the antenna using third-order filter has one more radiation null, wider stopband of 2.87-3.17 GHz and higher selectivity.