Universiti Teknologi Malaysia Institutional Repository

Wide stopband microstrip diplexer using a novel configuration for frequency division duplex and gsm-4g applications

Yahya, S. I. and Rezaei, A. and Noori, L. and Jamaluddin, M. H. (2019) Wide stopband microstrip diplexer using a novel configuration for frequency division duplex and gsm-4g applications. In: 2019 International Conference on Engineering, Science, and Industrial Applications, ICESI 2019, 22-24 Aug 2019, Tokyo, Japan.

Full text not available from this repository.

Official URL: https://dx.doi.org/10.1109/ICESI.2019.8862988


This paper presents a high performance microstrip diplexer based on a novel geometrical structure. The realized diplexer consists of coupled lines and semicircular structures. It operates at 2.58 GHz and 2.72 GHz, for GSM-4G and wireless applications. The diplexer channels are close to each other, which fulfill the frequency division duplex (FDD) application needs. The wide stopband rejections for both S21 and S31 are provided up to 15 GHz. Despite of quite close channels, the simulated and measured isolation between the two channels (S32) is better than -20 dB, from DC up to 20 GHz. The designing method is based on providing a theoretical approach to attenuate the harmonics and tuning the resonance frequency. Meanwhile, several transmission zeros are created after the passbands, which improve the stopband properties. The proposed diplexer provides sharp transition edges for both passbands. The high performance is obtained using a compact size of 0.047gλ2. To verify the designing methodology, the proposed diplexer is fabricated and measured. Good agreement between simulation results and measurement results are observed.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:frequency division multiplexing, microstrip devices
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Electrical Engineering
ID Code:89975
Deposited By: Narimah Nawil
Deposited On:29 Mar 2021 13:57
Last Modified:29 Mar 2021 13:57

Repository Staff Only: item control page