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Liang Jiangang

Articles by Liang Jiangang
Spiral Antenna Cuts Low Profile To 9.4 GHz
An Archimedean spiral antenna features a unique transmission-line approach to achieve a bandwidth of 0.8 to 9.4 GHz in a compact size.
Tiny Spiral Spans 1.4 To 10.0 GHz

Antennas for broadband and multiple-standard communications must provide excellent performance in a small area. While a spiral antenna can provide consistent radiation patterns, the size reduction is often a problem, since the antenna’s design is related to the physical wavelengths of the operating frequencies. Fortunately, a miniaturized arm-width-tapered Archimedean spiral antenna (ATARSA) has been designed that delivers outstanding performance in a size that is dramatically reduced compared to conventional spiral antennas.

Compact Monopole Sleeve Antenna Reaches 11.8 GHz

Antennas for ultrawideband (UWB) must exhibit wide operating bandwidth, but also small size for use in a variety of electronic devices. A monopole planar sleeve antenna may meet those requirements with a broad frequency range extending almost to 12 GHz. It consists of symmetrical strips and a ground plane on the same side, using a coplanar-waveguide (CPW) structure on low-cost FR-4 dielectric substrate material with relative dielectric constant of 2.95 and thickness of 1.6 mm. This antenna is suitable for worldwide interoperability for microwave access (WiMAX) applications.

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