Input signal shaping for target identification using genetic algorithms

✍ Scribed by Gönül Turhan-Sayan; Kemal Leblebicioğlu; Serhat İnan

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 111 KB
• Volume: 17
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19980205)17:2<128::aid-mop14>3.0.co;2-4

✦ Synopsis

characterized, and this is the reason for the poor return loss and the ripples in the response.

For the electromagnetic analysis of the CPW discontinu-Ž .w x ities, em Sonnet 10 has been used. The measurement was made using a Cascade Microtech wafer probe station and an HP8510B vector analyzer. As can be seen, a very good agreement between the measured and simulated responses is achieved, except that there is a discrepancy in the level of stopband rejection. This is due to unexpected coupling through the substrate. The noise in the measured stopband return loss is a calibration artefact. Figure 6 shows a layout of a fabricated CPW multilayer low-pass filter, measuring 600 = 2200 m.

IV. CONCLUSION

A very small microwave MMIC low-pass filter using novel multilayer coplanar waveguide transmission lines on Si substrate fabricated by using MMIC technology has been presented. The filter performance is investigated experimentally and with electromagnetic simulations. The proposed structures could be equally useful in high-Tc superconductor microwave circuits once such multilayer structures become available in this technology.