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The defense date of the thesis is 2005-07-20
The current date is 2017-11-25
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URN etd-0720105-154738 Statistics This thesis had been viewed 1658 times. Download 16 times. Author Chung-Lung Wu Author's Email Address firstname.lastname@example.org Department Communication Engineering Year 2004 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 50 Title DESIGN Of FREQUENCY SELECTIVE SURFACES ON FR4 SUBSTRATES Keyword FR4 SUBSTRATES FR4 SUBSTRATES Abstract In this thesis, frequency selective surfaces were made on FR4 substrates and experiments were done to study their performance. Two kinds of arrays are studied, one is a dipole array and the other one is an hexagonal array. For the dipole array, dual frequency operation is also implemented using two different lengths of dipoles. It has been studied that two frequencies can easily be distinguished when the ratio of the longer dipole to the shorter one is greater than . In this thesis the two operating frequency were designed at 5.7 and 9.7 GHz. The attenuation is at least 20dB for both frequencies.
The hexagonal array was designed to operate at a lower frequency. In this thesis, the band-stop frequency of the hexagonal array is designed at 2.45 GHz. The total length of the hexagonal elements is 87cm, the space of each elements is 1.1mm, and the width of the conductor is 1mm. Experiments found that as the width of the conductor increases, the performance has greater attenuation, and as the space of each elements increases, the band-stop frequency moves higher. Hexagonal array can stop either the vertical or the horizontal polarization transmitting wave without changing its position at the operation frequency.
Advisor Committee none - advisor
Powen-Hsu - co-chair
Shih-Chieh Chao - co-chair
Files Date of Defense 2005-06-24 Date of Submission 2005-07-20