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A miniature fractal-based dual-mode dual-band microstrip bandpass filter design

Alqaisy, Mushtaq and Chakrabraty, Chandan and Ali, Jawad and Alhawari, Adam Reda Hasan (2015) A miniature fractal-based dual-mode dual-band microstrip bandpass filter design. International Journal of Microwave and Wireless Technologies, 7 (2). pp. 127-133. ISSN 1759-0787; ESSN: 1759-0795

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In this paper, a fractal-based complementary split-ring resonator (CSRR) has been introduced as a defected ground structure (DGS) in the ground plane of a dual-mode microstrip bandpass filter to produce a new compact filter with dual-band response. The conventional double square ring resonator structure is modified such that its inner ring is made with a fractal shape instead of a square. Measured and simulation results show that the resulting filter offers a dual passband response; the higher passband is attributed to the dual-mode microstrip ring structure, whereas the lower passband is as a result of the embedded CSRR DGS structure. In addition, the results show that the position of the lower passband could be varied, to a certain extent, without affecting the position of the higher passband by applying higher fractal iteration levels to the inner split ring. These features, together with the compact size the proposed filter offers, make it suitable for use in a wide variety of dual-band communication applications. Measured results, carried out on filter prototypes, have been found in agreement with those theoretically predicted.

Item Type:Article
Keyword:Filters; Circuit design and applications
Faculty or Institute:Faculty of Engineering
Publisher:Cambridge University Press and the European Microwave Association
DOI Number:10.1017/S1759078714000622
ID Code:36183
Deposited By: Nabilah Mustapa
Deposited On:09 Jun 2015 19:00
Last Modified:19 Aug 2015 16:42

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