High isolation of SPDT PIN diode switch using switchable dumbbell-shaped DGS in millimeter wave28 GHz band

Shairi, Noor Azwan and Mohd Yasin, Fatin Nadiah and Othman, Adib and Ahmad Majid, Huda and Zakaria, Zahriladha and Mohd Ibrahim, Imran and Jamaluddin, Mohd Haizal (2023) High isolation of SPDT PIN diode switch using switchable dumbbell-shaped DGS in millimeter wave28 GHz band. Bulletin of Electrical Engineering and Informatics, 12 (6). pp. 3509-3516. ISSN 2089-3191

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Official URL: https://beei.org/index.php/EEI/article/view/6071

Abstract

This paper proposes a high isolation of single pole double throw (SPDT) PIN diode switch using switchable dumbbell-shaped defected ground structure (DGS). The proposed SPDT switch was designed for radio frequency (RF) front-end transceiver of antenna array multiple input multiple output (MIMO) in millimeter wave 28 GHz band. The switchable dumbbell-shaped DGS can be switched between allpass and bandstop responses where the bandstop response of the DGS can be utilized as a high isolation in the SPDT PIN diode switch circuit. A simple mathematical analysis is explained in this paper for the bandstop and allpass responses of the switchable dumbbell-shaped DGS. The propose SPDT switch was designed based on Roger RT/Duroid 5880 with 0.254 mm thickness and relative dielectric constant of 2.2. The simulated result showed that the proposed SPDT PIN diode switch produced an isolation of 36.36 dB at 27.3 GHz (center of 28 GHz band), which was 63% higher than the conventional SPDT design.

Item Type:	Article
Uncontrolled Keywords:	Defected ground structure, Millimeter wave, Single pole double throw switch, Switchable defected ground structure, Switches
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	12 Jun 2025 15:00
Last Modified:	12 Jun 2025 15:00
URI:	http://eprints.utem.edu.my/id/eprint/28748
Statistic Details:	View Download Statistic

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