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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document : 6 / 14 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) À§¼ºÅë½Å¿ë Àü·ÂÁ¦¾î °íÃâ·ÂÁõÆø±âÀÇ ±¸Çö ¹× ¼º´ÉÆò°¡¿¡ °üÇÑ ¿¬±¸
¿µ¹®Á¦¸ñ(English Title) A Study on Implementation and Performance of the Power Control High Power Amplifier for Satellite Mobile Communication System
ÀúÀÚ(Author) ÀüÁß¼º   ±èµ¿ÀÏ   ¹èÁ¤Ã¶   Joong Sung Jeon   Dong Il Kim   Jung Chul Bae  
¿ø¹®¼ö·Ïó(Citation) VOL 04 NO. 01 PP. 0077 ~ 0088 (2000. 03)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â INMARSAT-BÇü ¼Û½Å±â¿¡ »ç¿ëµÇ´Â L-BAND(1626.5-1646.5 MHz)¿ë 3´Ü °¡º¯À̵æ Àü·ÂÁõÆø±â¸¦ ¿¬±¸ °³¹ßÇÏ¿´´Ù. 3´Ü °¡º¯À̵æ Àü·ÂÁõÆø±â´Â ±¸µ¿ÁõÆø´Ü°ú Àü·ÂÁõÆø´Ü¿¡ ÀÇÇØ °íÃâ·Â ¸ðµåÀÏ ¶§ 42 dBm, Áß°£Ãâ·Â ¸ðµåÀÏ ¶§´Â 38 dBm, ÀúÃâ·Â ¸ðµåÀÏ ¶§´Â 34 dBmÀÇ Àü·ÂÀ¸·Î ÁõÆøµÇ¸ç, °¢°¢¿¡ ´ëÇØ »óÇÑ 1 dBm°ú ÇÏÇÑ 2 dBmÀÇ ¿ÀÂ÷¸¦ Çã¿ëÇÑ´Ù. Á¦ÀÛÀÇ °£Æí¼º ¶§¹®¿¡ Àüü 3´Ü °¡º¯À̵æ Àü·ÂÁõÆø±â¸¦ Å©°Ô ±¸µ¿ÁõÆø´Ü°ú Àü·ÂÁõÆø´Ü µÎ ºÎºÐÀ¸·Î ³ª´©¾î ±¸ÇöÇÏ¿´À¸¸ç, Àü·ÂÁõÆøºÎ¸¦ ±¸µ¿Çϱâ À§ÇÑ ±¸µ¿´ÜÀº HP»çÀÇ MGA-64135¿Í Motorola»çÀÇ MRF-6401À» »ç¿ëÇÏ¿´À¸¸ç, Àü·ÂÁõÆø´ÜÀº ERICSSON»çÀÇ PTE-10114¿Í PTF-10021À» »ç¿ëÇÏ¿© RPºÎ, ¿Âµµº¸»óȸ·Î, Ãâ·Â Á¶Àýȸ·Î ¹× Ãâ·Â °ËÃâȸ·Î¸¦ ÇÔ²² ÁýÀûÈ­ ÇÏ¿´´Ù. À̵æÁ¶ÀýÀº µðÁöÅÐ °¨¼è±â¸¦ »ç¿ëÇÏ¿´À¸¸ç, Ãâ·Â½ÅÈ£ÀÇ ¼¼±â¸¦ °ËÃâÇϱâ À§ÇÏ¿© 20 dB ¹æÇ⼺ °áÇձ⸦ ÀÌ¿ëÇÏ¿´´Ù. Á¦ÀÛµÈ 3´Ü °¡º¯À̵æ Àü·ÂÁõÆø±â´Â 20 MHz´ë¿ªÆø ³»¿¡¼­ ¼Ò½ÅÈ£ À̵æÀÌ 41.6 dB, 37.6 dB, 33.2 dB ¸¦ ¾ò¾úÀ¸¸ç, ÀÔÃâ·Â Á¤ÀçÆĺñ´Â 1.3:1 ÀÌÇÏ, 12 dBmÀÇ PldB, PldB Ãâ·Â·¹º§¿¡¼­ 3 dB Back off ½ÃÄ×À» ¶§ 36.5 dBcÀÇ IM3¸¦ ¾ò¾ú´Ù. 1636.5 MHz ÁÖÆļö¿¡ ´ëÇØ Ãâ·ÂÀü·ÂÀº 43 dBmÀ¸·Î¼­ ¼³°è½Ã ¸ñÇ¥·Î Çß´ø ÃÖ´ë Ãâ·ÂÀü·Â 20 Watt¸¦ ¾ò¾ú´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, the 3-mode variable gain high power amplifier for a transmitter of INMARSAT-B operating at L-band(1626.5-1646.5 MHz) was developed. This SSPA can amplify 42 dBm in high power mode, 38 dBm in medium power mode and 36 dBm in low power mode for INMARSAT-B. The allowable errol sets 1 dBm as the upper limit and -2 dBm as the lower limit, respectively. To simplify the fabrication process, the whole system is designed by two parts composed of a driving amplifier and a high power amplifier. The HP's MGA-64135 and Motorola's MRF-6401 were used for driving amplifier, and the ERICSSON's PTE-10114 and PTF-10021 for the high power amplifier. The SSPA was fabricated by the RP circuits, the temperature compensation circuits and 3-mode variable gain control circuits and 20 dB parallel coupled-line directional coupler in aluminum housing.
In addition, the gain control method was proposed by digital attenuator for 3-mode amplifier. Then il has been experimentally verified that the gain is controlled for single tone signal as well as two tone signals. In this case, the SSPA detects the output power by 20 dB parallel coupled-line directional coupler and phase non-splitter amplifier. The realized SSPA has 41.6 dB, 37.6 dB and 33.2 dB for small signal gain within 20 MHz bandwidth, and the VSWR of input and output port is less than 1.3:1. The minimum value of the 1 dB compression point gets more than 12 dBm for 3-mode variable gain high power amplifier. A typical two tone intermodulation point has 36.5 dBc maximum which is single carrier backed off 3 dB from 1 dB compression point. The maximum output power of 43 dBm was achieved at the 1636.5 MHz. These results reveal a high power of 20 Watt, which was the design target.
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