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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 :

ÇѱÛÁ¦¸ñ(Korean Title) °ø¾× À§»óº¯À§±â¿ë LS ¹êµå HEMT È¥ÇÕ±â
¿µ¹®Á¦¸ñ(English Title) HEMT Mixer for Phase Conjugator Applications in the LS Band
ÀúÀÚ(Author) ÀüÁßâ   Joong-Chang Chun  
¿ø¹®¼ö·Ïó(Citation) VOL 08 NO. 02 PP. 0239 ~ 0244 (2004. 04)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â LS ¹êµå¿¡¼­ µ¿ÀÛÇÏ´Â °ø¾× À§»óº¯À§±â(phase conjugator)¿ë HEMT È¥Çձ⸦ ¼³°è Á¦ÀÛÇÏ¿´´Ù. ¿ªÁöÇ⼺ ¾ÈÅ׳ª(retrodirective antenna) ½Ã½ºÅÛÀÇ °ø¾×À§»óº¯À§±â·Î »ç¿ëµÇ´Â È¥ÇÕ±âÀÇ Æ¯Â¡Àº RF ¹× IF ½ÅÈ£ÀÇ ÁÖÆļö°¡ ºñ½ÁÇϸç, ¸ðµÎ °íÁÖÆÄ ½ÅÈ£¶ó´Â Á¡ÀÌ´Ù. µû¶ó¼­ LO ½ÅÈ£ÀÇ ÁÖÆļö´Â RF ÁÖÆļöÀÇ ¾à 2¹è°¡ µÇ¸ç, µÎ ÀԷ½ÅÈ£ÀÇ ÇÕ¼º ¹× ÀÓÇÇ´ø½º Á¤ÇÕÀÌ ½±Áö ¾Ê°Ô µÈ´Ù. º» ¿¬±¸¿¡¼­´Â p-HEMT ¼ÒÀÚ¸¦ »ç¿ëÇÏ¿©, LO4.00 GHz, RF 2.01 GHz, IF 1.99 GHz¿¡¼­ µ¿ÀÛÇÏ´Â °ÔÀÌÆ® È¥Çձ⸦ Á¦ÀÛÇÏ¿´´Ù. Á¦ÀÛµÈ È¥ÇÕ±â´Â -7 dBmÀÇ LO ½ÅÈ£¸¦ Àΰ¡ÇÏ¿´À» ¶§, º¯È¯À̵æÀÌ 12.5 dBÀ̸ç, 1-dB cmpression point´Â -34 dBmÀ¸·Î ÃøÁ¤µÇ¾ú´Ù. º» ¿¬±¸¿¡¼­ Á¦ÀÛµÈ È¥ÇÕ±â´Â single-ended ±¸Á¶·Î¼­, RF ¹× IF ÁÖÆļö°¡ ºñ½ÁÇϹǷΠRF ´©¼³½ÅÈ£°¡ °üÂûµÇ¾úÀ¸¸ç, ÆòÇü±¸Á¶(balanced type)ÀÇ È¥ÇÕ±â ¹× °ø¾× À§»óº¯À§±âÀÇ ¼³°è¿¡ Á÷Á¢ Àû¿ëµÉ ¼ö ÀÖ´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we have developed a frequency mixer which can be used as a microwave phase conjugator in the LS band retrodirective antenna system. The mixer as a phase conjugator must have an If signal of which frequency is nearly as high as that of an RF signal, so this fact brings difficulty in the combination of input signals and the design of impedance matching circuit. The circuit configuration is chosen to be of the gate mixer using a pseudomorphic HEMT device. The operating frequencies are 4.00 §×, 2.01 §×, and 1.99 §× for LO, RF, and IF, respectively. Conversion gain is measured to be 12.5 §¼ and 1 §¼ compression point -34 §¼m at the LO power of -7 §¼m. The mixer fabricated in this research is the single-ended type, where RF leakage signal appears inevitably at the If port because RF and If frequencies are almost the same. The circuit topology suggested here can be applied directly to the design of balanced-type mixers and phase conjugators.
Å°¿öµå(Keyword) HEMT È¥Çձ⠠ °ø¾× À§»óº¯À§±â   °ÔÀÌÆ® ÈçÇձ⠠ ÀÓÇÇ´ø½º Á¤ÇÕ   ¿ªÁöÇ⼺ ¾ÈÅ׳ª  
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