Dual‐band dual‐sense broadband circularly polarized parasitic ring loaded monopole antenna for satellite applications

• Published in: International journal of communication systems 2022-09, Vol.35 (14), p.n/a
• Main Authors: Bag, Biplab, Mondal, Kalyan, Sarkar, Partha Pratim
• Format: Article
• Language: English
• Subjects: annular ring; Antennas; AR BW; Bandwidths; Broadband; Circular polarization; Current distribution; dual‐band; Frequencies; monopole; Monopole antennas; Monopoles; Parasitic elements (antennas); satellite; Satellite communications; Space applications; Substrates
• ISSN: 1074-5351; 1099-1131
• DOI: 10.1002/dac.5258

Summary A novel‐shaped dual‐band circularly polarized (CP) monopole antenna is proposed. Two parasitic strips are fabricated under the unique shaped monopole element to get dual broad operation bands. The proposed antenna is fabricated on the FR4 substrate with the specification of the substrate dimension 40 mm × 30 mm, εr=4.4, h=1.6mm, and loss tangent tanδ=0.02. The parasitic elements are responsible to improve the current distribution Ix and Iy on the surface. Two CP modes are developed for orthogonally distributions of Ex and Ey fields with same magnitude. All the successive CP modes are merged, and a broad AR BW is achieved. The RHCP and LHCP waves radiate along the broadside direction at the lower and higher frequency bands. The achieved two impedance bandwidth and axial ratio (AR) bandwidth are 1.5 GHz (7.05–8.55 GHz), 4.45 GHz (11.65–16.1 GHz) and 1.4 GHz (7.1–8.5 GHz), 0.2 GHz (14.6–14.8 GHz). A very good gain response along with two peak gains of 5.5 dBi and 5.9 dBi is achieved. The proposed antenna is applicable for International Telecommunication Union (ITU) satellite communication (7.25–7.75 GHz, 7.9–8.4 GHz) and Ku‐band satellite applications (11.7–12.2 GHz) and (14–14.5 GHz). A novel‐shaped dual‐band circularly polarized monopole antenna with two annular ring parasitic strips are mounted under the unique shaped monopole element. The proposed antenna is fabricated on the FR4 substrate with the specification of the substrate dimension 40 mm × 30 mm, εr = 4.4, h = 1.6 mm, and loss tangent tan δ = 0.02. The proposed antenna is applicable for International Telecommunication Union (ITU) satellite communication (7.25–7.75 GHz, 7.9–8.4 GHz) and Ku‐band satellite applications (11.7–12.2 GHz) and (14–14.5 GHz).