A New Class Of Microwave Filter With Defected Microstrip Structure (DMS)

Megat Muhammad Nazreen, Megat Arif Fadillah (2014) A New Class Of Microwave Filter With Defected Microstrip Structure (DMS). Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 pages) A New Class Of Microwave Filter With Defected Microstrip Structure (DMS) 24 Pages.pdf - Submitted Version Download (420kB)

Abstract

A compact ultra-wideband (UWB) band-pass filter suitable for a short distance and high-rate such as UWB radar systems for military, medical and civilian is presented. However, undesired radio signal such as Wireless LAN and WiMAX in the range UWB band that can interfere UWB signal. Thus, this project is to design and developed five order band-pass filter by using optimum distributed high-pass integrated with Defected Micro-strip Structure (DMS) been used to produce a band reject characteristics simultaneously in UWB response. This design is simulated by ADS software and using Roger Duroid 4350 with a dielectric constant 3.48, thickness of substrate 0.508 mm and loss tangent 0.0019. The proposed UWB filters are verified by experiments and fabricated. Measurement for UWB filter implemented using the Agilent Vector Network Analyzer. The filter exhibits an ultra-wideband response from 2.238 to 9.842GHz with a return loss S11 better than 10 dB and insertion loss S21 less than 1 dB respectively, and the DMS exhibit a band rejects response better than 20dB at a frequency of 5.6 GHz. The proposed filter has better performance and is attractive for UWB application and able to reject undesired frequency in UWB communication.

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