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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 : 9 / 328 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) ±¤´ë¿ª µ¿Ã༱·Î ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ µ¿ÀÛ Æ¯¼º ºÐ¼®
¿µ¹®Á¦¸ñ(English Title) The analysis of the operating characteristic for the wideband coaxial line impedance transformer
ÀúÀÚ(Author) ¹Ú¿õÈñ   Ung-hee Park  
¿ø¹®¼ö·Ïó(Citation) VOL 23 NO. 02 PP. 0165 ~ 0172 (2019. 02)
Çѱ۳»¿ë
(Korean Abstract)
µÎ °³ ÀÌ»óÀÇ µ¿Ã༱À» »ç¿ëÇÏ¿© ÇÑ ÂÊÀº µ¿Ã༱À» Á÷·Ä·Î ¿¬°áÇÏ°í, ¹Ý´ë ÂÊÀº µ¿Ã༱À» º´·Ä·Î ¿¬°áÇÏ¸é ±¤´ë¿ª¿¡¼­ µ¿ÀÛÇÏ´Â ÀÓÇÇ´ø½º º¯È¯È¸·Î°¡ µÈ´Ù. µ¿Ã༱À» ÀÌ¿ëÇÑ ±¤´ë¿ª ÀÓÇÇ´ø½º º¯È¯È¸·Î´Â µ¿Ã༱ÀÇ ¿Ü°û µµÃ¼¸¦ ÀÓÇÇ´ø½º º¯È¯¿¡ ÀÌ¿ëÇϱ⠶§¹®¿¡ ¼ö½Ä ¶Ç´Â ½Ã¹Ä·¹ÀÌ¼Ç ÇÁ·Î±×·¥À» ÅëÇÑ ¿¹ÃøÀÌ ¸Å¿ì ¾î·Æ´Ù. º» ³í¹®¿¡¼­´Â ¥ë/4–¸¶ÀÌÅ©·Î½ºÆ®¸³ ¼±·Î ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ ¼±·Î ½ÅÈ£ °¨¼â¿¡ ´ëÇÑ Àü´Þ Ư¼º(S21) Çؼ®À» ¹ÙÅÁÀ¸·Î 25¥Ø µ¿Ã༱ µÎ °³¸¦ ÀÌ¿ëÇÑ ±¤´ë¿ª 4:1(50¥Ø:12.5¥Ø) Àü¼Û¼±·Î ÀÓÇÇ´ø½º º¯È¯È¸·Î¸¦ Á¦ÀÛÇÏ¿© µ¿ÀÛ Æ¯¼ºÀ» »ìÆ캸¾Ò´Ù. µÎ °³ÀÇ µ¿Ã༱À» ÀÌ¿ëÇÑ ±¤´ë¿ª ÀÓÇÇ´ø½º º¯È¯±â´Â µ¿Ã༱ÀÇ ±æÀ̸¦ 90µµ(¥ë/4)·Î ÀνÄÇÏ´Â ÁÖÆļö¿¡¼­ ½ÅÈ£ Àü´Þ Ư¼º(S21)ÀÌ ±Þ°ÝÈ÷ °¨¼ÒÇÏ´Â ³ëÄ¡ Ư¼ºÀÌ ¹ß»ýÇÏ¿´´Ù. ¶ÇÇÑ, µ¿Ã༱ ±æÀÌÀÇ 0.06~0.2¥ë¿¡ ÇØ´çÇÏ´Â ÁÖÆļö ¹üÀ§¿¡¼­ ½ÅÈ£ Àü´ÞƯ¼º(S21) -0.2dBÀ̳»ÀÇ °ªÀ» °¡Á³´Ù. ÀÌ·¯ÇÑ ½ÅÈ£ Àü´ÞƯ¼º(S21)Àº Ãâ·Â ´Ü¿¡ ¿¬°áµÈ ¸¶ÀÌÅ©·Î½ºÆ®¸³ ¼±·ÎÀÇ ±æÀÌ º¯È­¸¦ ÅëÇØ ¾à°£ÀÇ µ¿ÀÛ ÁÖÆļö ¹üÀ§ º¯È­¿Í ¿øÇÏ´Â ÁÖÆļö¿¡¼­ ÃÖÀûÀÇ ½ÅÈ£ Àü´ÞƯ¼º(S21)À» ¼³Á¤ÇÒ ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
Using two or more coaxial lines, if one port is connected in series and the other port is connected in parallel, it can be implemented the wideband transmission line transformer(TLT). Because the wideband TLT utilizes the outer conductor of the coaxial line, it is difficult to predict the characteristics. In this paper, based on the analysis for the transfer characteristic(S21) according to the loss of the each line in ¥ë/4-microstrip line TLT, the operating characteristic of the fabricated wideband 4:1 TLT using two 25¥Ø-coaxial lines is investigated. The fabricated wideband TLT shows the notch characteristic in which the transfer signal sharply decreases at ¥ë/4 frequency of the coaxial line and has a value within –0.2dB of the transfer characteristic(S21) in 0.06~0.2¥ë frequency range of the coaxial line. This transfer characteristics(S21) can change the operating frequency range slightly and set the optimum transfer characteristic(S21) at the desired frequency by changing the length of the microstrip line.
Å°¿öµå(Keyword) ±¤´ë¿ª ÀÓÇÇ´ø½º º¯È¯±â   µ¿Ã༱·Î ÀÓÇÇ´ø½º º¯È¯±â   Àü¼Û¼±·Î º¯È¯±â   Á¤ÇÕ È¸·Î   ¥ë/4-ÀÓÇÇ´ø½º º¯È¯È¸·Î   Coaxial line impedance transformer   Impedance matching circuit   Transmission line transformer(TLT)   Wideband impedance transformer   ¥ë/4-impedance transformer  
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