Nonreciprocal composite with the material relations of the transparent absorbing boundary

✍ Scribed by Sergei A. Tretyakov

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 174 KB
• Volume: 19
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19981205)19:5<365::aid-mop16>3.0.co;2-#

✦ Synopsis

gain in the case of 40 m thick BCB is smaller than in the case of 20 m BCB. This can be due to coupling power to the surface-wave modes, which increases as the thickness of the thin BCB film increases.

CONCLUSION

Brick-wall antennas fed by a coplanar waveguide and built in the MCM-D technology are studied. The thin films used in the MCM-D technology are found to significantly affect the antenna performance. They increase the resonance frequency of the antenna as a consequence of the decrease of the effective dielectric constant. Such a behavior can be used to tune the antenna to a specific resonance frequency. The reduction of the effective dielectric constant of the layer structure due to the thin film results in increasing the effective aperture of the antenna. As a consequence, the gain of the antenna increases by the deposition of the thin film. However, the increase in the antenna gain is limited due to the fact that the power coupling to the surface-wave modes is also increasing as the thickness of the thin film increases. The analysis was carried out both theoretically and experimentally. Very good agreement between theory and measurements is observed. Such a study is important for integrating the CPW-fed slot antennas with the microwave and the Ž . digital circuits in a multichip module MCM .