We design and manufacture RF transistors with ranging from 0.6Ghz to 10Ghz. our RFtransistors is much more cost-effective than those from philips,NEC,Infenion.We would like to provide you free samples to test its quality.you can visit our website to find our RF transistors list.Best regards,ElsaHope Microelectronics Co.,LTDAddress:4/F, Block B3, East Industrial Area, Huaqiaocheng, Shenzhen, Guangdong, ChinaPost Code: 518052 Tel: +86-755-86096602?? ext:111Fax: +86-755-86096587? website: producing area:China payment:T/T, L/C supplying capacity:80,000,000pcs/month