Progress of multiband antenna technology in mobile phone industry

john019

【文件名】:06310@52RD_Progress of multiband antenna technology in mobile phone industry.pdf
【格　式】:pdf
【大　小】:299K
【简　介】:
【目　录】:In the 1990’s, the mobile phone industry experienced a dramatic development. The first stage was from analog standard to digital standard development, for example, analog standard such as AMPS (Advanced Mobile Phone System), NMT (Nordic Mobile Telephone) and ETACS; digital standard such as GSM, D-AMPS and CDMA. The second stage was from single band to multi-band due to the strong capacity requirements. DCS1800 and PCS1900 were introduced in the middle of 1990’s.