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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 : 4 / 41 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ ½ÅÈ£ Àü´ÞƯ¼º(S21) ÃøÁ¤ ¹æ¹ý
¿µ¹®Á¦¸ñ(English Title) Measurement method of the signal transfer characteristic(S21) of the impedance transformer
ÀúÀÚ(Author) ¹Ú¿õÈñ   Ung-hee Park  
¿ø¹®¼ö·Ïó(Citation) VOL 23 NO. 10 PP. 1282 ~ 1289 (2019. 10)
Çѱ۳»¿ë
(Korean Abstract)
ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ ½ÅÈ£ Àü´ÞƯ¼º(S21)À» ÃøÁ¤Çϱâ À§Çؼ­´Â µÎ °³ÀÇ ÀÓÇÇ´ø½º º¯È¯È¸·Î¸¦ ´ëĪ ¿¬°áÇÏ¿©¾ß ÇÑ ´Ù. ÇÏÁö¸¸ µÎ °³ÀÇ ÀÓÇÇ´ø½º º¯È¯È¸·Î¸¦ ´ëĪ ¿¬°áÇÑ È¸·ÎÀÇ ½ÅÈ£ Àü´ÞƯ¼ºÀº Áß°£ ¿¬°á ¼±·ÎÀÇ ±æÀÌ¿¡ ÀÇÇØ ¿µÇâÀ» ¹Þ´Â´Ù. º» ³í¹®¿¡¼­´Â ÀÓÇÇ´ø½º º¯È­È¸·ÎÀÇ Á¤È®ÇÑ ½ÅÈ£ Àü´ÞƯ¼ºÀ» ¾ò±â À§ÇÑ Áß°£ ¿¬°á ¼±·ÎÀÇ ±æÀ̸¦ ¼ö½ÄÀ¸·Î À¯µµÇÏ¿´´Ù. ¼ö½ÄÀ» ÀÌ¿ëÇÏ¿© °è»êÇϸé 4:1(50-¥Ø:12.5-¥Ø) ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ Á¤È®ÇÑ ½ÅÈ£ Àü´ÞƯ¼ºÀ» ¾ò±â À§ÇÑ Áß°£ ¿¬°á ¼±·ÎÀÇ Àü±âÀû ±æÀÌ´Â ¾à 45¡ÆÀÌ´Ù. °è»êµÈ ¿¬°á ¼±·ÎÀÇ ±æÀ̸¦ Àû¿ëÇÏ¿© 1GHz¿¡¼­ ¥ë/4-¸¶ÀÌÅ©·Î½ºÆ®¸³ ÀÓÇÇ´ø½º º¯È¯È¸·Î¸¦ Á¦ÀÛÇÏ¿© ½ÅÈ£ Àü´ÞƯ¼ºÀ» ÃøÁ¤ÇÏ¿´´Ù. Á¦ÀÛµÈ ´ëĪ ¿¬°áµÈ ÀÓÇÇ´ø½º º¯È¯È¸·ÎÀÇ ½ÅÈ£ ¹Ý»ç Ư ¼º(S11)Àº 0.980GHz¿¡¼­ -40.64dB, ½ÅÈ£ Àü´Þ Ư¼º(S21)Àº -0.154dB¿´´Ù. ÀÌ´Â Á¦ÀÛ È¸·Î¿¡ ´ëÇØ ÀÌ·ÐÀûÀ¸·Î »ìÆ캻 Á᫐ ÁÖÆļöÀÇ 987MHz º¯È­, ¸¶ÀÌÅ©·Î½ºÆ®¸³ ¼±·ÎÀÇ ½ÅÈ£ ¼Õ½Ç -0.15dB °ª°ú °ÅÀÇ µ¿ÀÏÇÑ °ªÀÌ´Ù.
¿µ¹®³»¿ë
(English Abstract)
In order to measure the transfer characteristic(S21) of the impedance transformer, two impedance transformers must be symmetrically connected. However, the transfer characteristic of two symmetrically connected impedance transformers is influenced by the length of the intermediate connection line. This paper theoretically examines closely the length of the intermediate connection line to obtain the accurate transfer characteristic of the impedance transformer. The electrical length of the intermediate connection line for obtaining the accurate transfer characteristic of the 4:1(50-¥Ø:12.5-¥Ø) impedance transformer is calculated about 45o. Using the calculated length of the connection line, The ¥ë/4-microstrip impedance transformer is fabricated at 1 GHz to measure the transfer characteristic. The symmetrically connected impedance transformer is measured the reflection characteristic(S11) of -40.64dB and the transfer characteristic(S21) of -0.154dB at 0.980GHz. This value is approximately equal to the theoretical calculated 987MHz center frequency and -0.15dB transfer loss value of the ¥ë/4-microstrip impedance transformer.
Å°¿öµå(Keyword) ¸¶ÀÌÅ©·Î½ºÆ®¸³ ÀÓÇÇ´ø½º º¯È¯±â   ½ÅÈ£ Àü´Þ Ư¼º   ÀÓÇÇ´ø½º º¯È¯±â   Àü¼Û¼±·Î º¯È¯±â   ¥ë/4-ÀÓÇÇ´ø½º º¯È¯È¸·Î   Impedance transformer   Microstrp-line impedance transformer   Signal transfer characteristic   Transmission line transformer(TLT)   ¥ë/4-impedance transformer  
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