A Compact Filtering Coupler with Unwanted Harmonic Rejection Using LC Composite Lines for Communication Systems Applications

Roshani, Saeed and Yahya, Salah I. and Mezaal, Yaqeen Sabah and Chaudhary, Muhammad Akmal and Al-Hilali, Aqeel A. and Ghadi, Yazeed Yasin and Karimi, Mohsen and Roshani, Sobhan (2022) A Compact Filtering Coupler with Unwanted Harmonic Rejection Using LC Composite Lines for Communication Systems Applications. Systems, 11 (1). pp. 1-14. ISSN 2079-8954

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Abstract

In this paper, new LC lumped components and composite lines are used to create a filtering branch line coupler (FBLC) with a small size and wide suppression band. New composite lines are proposed using applied LC lumped components, which are used as the coupler main branches. The proposed FBLC suppresses second to sixth harmonics with high attention level and provides a wide stopband from 1.6 GHz to 5 GHz with more than 20 dB of attention. The presented coupler is analyzed, designed, simulated, and implemented. The measured results show that the proposed FBLC correctly operates at 800 MHz with less than 0.25 dB of insertion loss. In addition, more than 29 dB of return loss and isolation is measured at operating frequency, which shows the correct performance of the proposed design. The size of the proposed FBLC is equal to 23.7 mm × 25.5 mm (0.086λ × 0.093λ), which shows an 87% size reduction. The proposed FBLC with the designed frequency can be used in the communication systems for narrow-band Internet of things (NB-IoT) and traffic control radar applications.

Item Type:	Article
Uncontrolled Keywords:	filtering coupler; harmonic rejection; composite line; communication systems; NB-IoT
Subjects:	Q Science > QA Mathematics > QA76 Computer software
Divisions:	Faculty of Engineering > Department of Software Engineering
Depositing User:	Dr Salah Ismaeel Yahya
Date Deposited:	02 Feb 2023 09:41
Last Modified:	02 Feb 2023 09:41
URI:	http://eprints.koyauniversity.org/id/eprint/352

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