📅 30 October 2025
DOI: 10.26877/asset.v7i4.1957
Design of Wideband SPDT RF Switch Using Switchable DGS for Sustainable Wireless Systems
Advance Sustainable Science, Engineering and Technology
Universitas Persatuan Guru Republik Indonesia Semarang
📄 Abstract
This paper presents a single-pole double-throw (SPDT) switch that is integrated with a thin rectangular patch switchable defected ground structure (DGS). It is a novel technology for obtaining wideband and high isolation for the SPDT switch in millimeter-wave (mm-wave) telecommunications due to the usage of switchable DGS with bandstop and bandwidth enhancement capabilities. A wideband and high isolation are required for the switchable DGS SPDT switch to operate optimally in mm-wave frequency ranges, as well as to reduce the effect of leakage signal on both the transmitter and receiver connected to the SPDT switch and hence improve system efficiency and signal integrity. The SPDT switch design was combined with two small rectangular patches switchable DGSs that could switch between bandstop and allpass responses using biasing diodes on the DGS. As a result, the suggested SPDT switch with the switchable DGS had 6 dB of insertion loss and high isolation of more than 25 dB with wideband isolation of 25.24% fractional bandwidth, which was consistent with the simulation results. Furthermore, the isolation magnitude is doubled compared to the conventional SPDT switch. This work demonstrates that integrating switchable DGS into discrete SPDT switches provides a practical solution for realizing wideband, high-isolation performance suitable for 5G mm-wave where compactness and bidirectional reconfigurability is increasingly essential for sustainable RF front-end systems.
🔖 Keywords
#Bandstop response; isolation; millimeter-wave; SPDT switch; switchable DGS; sustainable RF front-end system; wideband telecommunication
ℹ️ Informasi Publikasi
Tanggal Publikasi
30 October 2025
Volume / Nomor / Tahun
Volume 7, Nomor 4, Tahun 2025
📝 HOW TO CITE
Othman, Adib; Shairi, Noor Azwan; A Majid, Huda; Saparudin, Faiz Asraf; Zakaria, Zahriladha; Najib Al-Fadhali, "Design of Wideband SPDT RF Switch Using Switchable DGS for Sustainable Wireless Systems," Advance Sustainable Science, Engineering and Technology, vol. 7, no. 4, Oct. 2025.
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