25 GHz Band Active Integrated Antenna for Broadband Mobile Wireless Access Systems

Tomohiro SEKI  Fusao NUNO  Takeo ATSUGI  Masahiro UMEHIRA  Junji SATO  Takashi ENOKI  

IEICE TRANSACTIONS on Electronics   Vol.E86-C    No.8    pp.1520-1526
Publication Date: 2003/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
active integrated antenna,  MSL/slot transition,  spatial power combining schemes,  broadband mobile wireless access,  quasi-millimeter and millimeter-wave frequency band,  

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This paper first presents an active integrated antenna configuration designed for broadband mobile wireless access systems using the 25-GHz band. This active integrated antenna comprises a microstrip antenna array and RF front-end circuits adopting spatial power combining schemes for reduced power consumption of the power amplifiers. Furthermore, the antenna and RF circuits are integrated into each side of a thick copper backing plate and both are connected through microstrip line /slot transitions. The developed active integrated antenna achieves the output power of 14.6 dBm and a noise figure of less than 5 dB. The wireless system using the developed active integrated antenna achieves a 6-dB improvement in the packet error rate compared to that using a passive antenna with the same array design as the active integrated antenna. Furthermore, we obtained the first license of the active integrated antenna for commercial use in high-speed wireless communication systems in Japan.