Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
ÇѱÛÁ¦¸ñ(Korean Title) |
ÀúÇ× °áÇÕȸ·Î¸¦ ÀÌ¿ëÇÑ Cellular CDMA¿ë ÀúÀâÀ½ ÁõÆø±âÀÇ ±¸Çö |
¿µ¹®Á¦¸ñ(English Title) |
Development of the Low Noise Amplifier for Cellular CDMA Using a Resistive Decoupling Circuit |
ÀúÀÚ(Author) |
ÀüÁß¼º
±èµ¿ÀÏ
Joong-Sung Jeon
Dong-Il Kim
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¿ø¹®¼ö·Ïó(Citation) |
VOL 02 NO. 04 PP. 0635 ~ 0641 (1998. 12) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ¼¿·ê·¯ CDMA ±âÁö±¹ ¹× Áß°è±âÀÇ ¼ö½ÅºÎ¿¡ »ç¿ëµÇ´Â Å©±â°¡ ÀÛÀº 824 ¡ 849 MHz¿ë ÀúÀâÀ½ ÁõÆø±â(Low Noise Amplifier)¸¦ ÀúÇ× °áÇÕȸ·Î¸¦ »ç¿ëÇÏ¿© ±¸ÇöÇÏ¿´´Ù. »ç¿ëµÈ ÀúÇ× °áÇÕȸ°í´Â ¹Ý»çµÇ´Â Àü·ÂÀÌ Á¤ÇÕȸ·Î³»ÀÇ ÀúÇ׿¡¼ ¼Ò¸ðµÇ¹Ç·Î ¹Ý»ç°è¼ö°¡ ÀÛ¾ÆÁö°í, ¾ÈÁ¤µµµµ °³¼±µÇ¸ç ÀúÀâÀ½ ÁõÆø±âÀÇ ¼³°è½Ã ÀÔ·Â´Ü Á¤ÇÕ¿¡ ¿ëÀÌÇÏ¿´´Ù ÀúÀâÀ½ ÁõÆø±âÀÇ ¼³°è Á¦ÀÛ¿¡´Â ÀúÀâÀ½ GaAs FETÀÎ ATF-10136°ú ³»ºÎÁ¤ÇÕµÈ MMICÀÎ VNA-25¸¦ ÀÌ¿ëÇÏ¿´À¸¸ç, ¾Ë·ç¹Ì´½ ±â±¸¹°¾È¿¡ RF ȸ·Î¿Í ÀÚü ¹ÙÀ̾(Self-bias) ȸ·Î¸¦ ÇÔ²² Àå Âø½ÃÄ×´Ù. ÀÌ·¸°Ô Á¦ÀÛµÈ ÀúÀâÀ½ ÁõÆø±â´Â 35dBÀÌ»óÀÇ À̵æ°ú 0.9dBÀÌÇÏÀÇ ÀâÀ½Áö¼ö, 18.6dBmÀÇ P1dB, P1dB Ãâ·Â·¹º§¿¡¼ 10dB back off ½ÃÄ×À»¶§ 31.17dBÀÇ IM3¸¦ ¾ò¾ú´Ù.
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¿µ¹®³»¿ë (English Abstract) |
This paper presents development of a small size LNA operating at 824 ¡ 849 MHz used for a receiver of a CELLULAR CDMA Base station and a transponder. Using resistive decoupling circuits, a signal at low frequency is dissipated by a resistor. This design method increases the stability of the LNA and is suitable for input stage matching. The LNA consists of low noise GaAs FET ATF-10136 and internally matched VNA-25. The LNA is fabricated with both the RF circuit and the self-bias circuits in aluminum housing. As a result, the characteristics of the LNA implemented here shows above 35dB in gain and below 0.9dB in noise figure, 18.6dBm P1dB power, a typical two tone IM3, -31.17dB with single carrier backed off 10dB from P1dB.
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