Performance Evaluation of Digital Radio Broadcasting Frequency Chebyshev CLF and HPF Designs Using ROGER 4003C

Johari, Ayob and Tean, T.G. and Ayob, Mohd Erdi and Md Noor, D. Performance Evaluation of Digital Radio Broadcasting Frequency Chebyshev CLF and HPF Designs Using ROGER 4003C. In: TISD 2006, Technology and Innovation for Sustainable Development Conference , 25-26 January 2006, Thailand.

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Abstract

Filters are two port networks used to control the frequency response in an RF or microwave system by allowing transmission at frequencies within the passband, and attenuation within the stopband of the filter. This research project consist of the elementary principle of microwave theory, the elementary knowledge of microwave filter design as well as fabrication and performance evaluation of Chebychev bandpass filters. The Chebyshev response is more selective than the Butterworth response at the expense of the insertion loss and greater group delay. The purpose of the research project is to design, fabricate, test and evaluate the performance of microstrip filter based on coupled line filter (CLF) and hair pin filter (HPF) designs on the ROGER 4003C substrate material. The insertion loss method was used to produce the parallel coupled quarter wavelength resonator filters. The compatible filter mentioned in this project was able to filter out the required frequency for Digital Radio Broadcasting in the range of 1.452 GHz to 1.492 GHz. The filters were designed and simulated using Microwave Office 2003 (V6.01). Prototype of Chebychev bandpass hairpin line and coupled line filters were then fabricated on ROGER4003C material. The entire filter designs and the performances of the substrate material to the designs are contrast. The filters were tested using Advantest R3767CG Network Analyzer. From the test results it was found that for the specified 3 dB bandwidth of 40 MHz, CLF performed 50.6052 MHz, and HPF 45.0936 MHz. Center frequency (1.4720 MHz), CLF performed 1.4298 MHz, HPF 1.4755 MHz. Load quality Q (36.8), CLF performed 36.614, HPF 28.2540 and the specified matching impedance of 50 Ω, CLF performed 51.587 and HPF 42.078. Keywords: Chebychev, microstrip, coupled line, hairpin filter, digital radio broadcasting

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Chebychev; microstrip; coupled line; hairpin filter; digital radio broadcasting
Subjects:T Technology > T Technology (General)
ID Code:2739
Deposited By:Normajihan Abd. Rahman
Deposited On:28 Aug 2012 16:38
Last Modified:28 Aug 2012 16:38

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