TECHNOLOGY ASSESSMENT

Smart antenna technology varies substantially among companies, and since many of these companies are multinational, it is difficult to make a comparative assessment of the technology among regions. Nearly all wireless companies visited, and therefore regions, have significant research in smart antennas, and thus overall the current status of the regions in smart antennas appears to be about equal. However, the emphasis of the research on phased or adaptive arrays varies by application. Specifically, Japanese companies emphasize WCDMA and higher frequencies, and thus the major focus of their work is on phased arrays. On the other hand, U.S. and European companies tend to emphasize lower frequencies (850 and 1900 MHz), and TDMA systems (GSM, EDGE, ANSI-136) as well as WCDMA, and therefore focus on adaptive arrays in addition to phased arrays. Thus, Japan leads in smart antenna research and technology for phased arrays, particularly at higher frequencies (5 GHz and above), whereas the United States and Europe lead in adaptive array research and technology (see Table 6.1).

Table 6.1
Technology Comparison

 

U.S.

Japan

Europe

Smart Antennas Overall

*****

*****

*****

Phased Arrays

***

*****

***

Adaptive Arrays

*****

***

*****





Published: July 2000; WTEC Hyper-Librarian