The application of optical packet switching in future communication networks, IEEE ABSTRACT: A novel dual-band antenna made of a narrow, rectangular, flat metal plate for wireless local area network (WLAN) operation in the 2.4-and 5.2-GHz bands is presented. The antenna comprises a larger radiating arm, a smaller radiating arm, and a shorting portion. The larger and smaller radiating arms control a lower resonant mode at about 2.4 GHz and an upper resonant mode at about 5.2 GHz, respectively, and are connected to each other through the shorting portion. The antenna is easily excited by using a 50⍀ mini coaxial line and shows good antenna performance. The proposed antenna design is de-scribed and experimentally studied.ABSTRACT: A methodology is presented for the design synthesis of metamaterials that act as thin multifrequency artificial magnetic conductors. These structures are realized by placing a frequency-selective surface above a conventional prefect electric conductor, separated by a thin dielectric layer. The frequency-selective surface design is optimized using a microgenetic algorithm to operate at multiple, narrow frequency bands. Two examples of genetically engineered multiband high-impedance frequency-selective surfaces (that is, artificial magnetic conductors) are presented and discussed.
A printed dual-band monopole antenna suitable for wireless local-area network (WLAN) applications in the 2.4-and 5.2-GHz bands is presented. The monopole antenna including the ground plane is printed on the same (front) surface of a narrow FR4 substrate (with no metallic portion in the back side of the substrate), which makes it easy to fabricate. In addition, the antenna also showed good radiation characteristics.ABSTRACT: A single-fed elliptic dielectric resonator antenna is designed for circular polarization. The feed is a coaxial probe chosen with the proper parameters to achieve wideband matching and good circular polarization properties. The analysis is performed numerically using WIPL-D. The single-fed DRA achieves 3.5% circular polarization bandwidth and 14% matching bandwidth.
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