¾ÈÅ׳ªÀ̷й׼³½À

 

½Ç½À 03 − ¾ß±â¾ÈÅ׳ª ¼³°è, Á¦ÀÛ ¹× ÃøÁ¤

 

1. ½Ç½À¸ñÀû

¤· MWS »ç¿ë¹ý ¼÷´Þ

¤· Yagi ¾ÈÅ׳ª µ¿ÀÛ¿ø¸® ÇнÀ

¤· Yagi ¾ÈÅ׳ª ¼³°è±â¼ú ½Àµæ

¤· Frequency Scaling °³³ä ½Ç½À

 

2. ±âÃÊ

¤· ¾ß±â ¾ÈÅ׳ª: 1926³â ÀϺ»°úÇÐÀÚ Yagi¿Í Uda¿¡ ÀÇÇØ ¹ß¸í

¤· ±ÞÀüµÈ ´ÙÀÌÆú ÁÖº¯¿¡ ±ÞÀüµÇÁö ¾ÊÀº ´ÙÀÌÆúÀ» ±â»ý¼ÒÀÚ(parasitic elements)¸¦ ¼³Ä¡ÇÏ¿© À̵æÀ» Áõ°¡

¤· ±â»ý¼ÒÀÚ: Á÷Á¢ ±ÞÀüµÇÁö ¾Ê°í ÀÔ»çµÈ ÀüÀÚÆÄ(±ÞÀüµÈ ´ÙÀÌÆú¿¡ ÀÇÇÑ)¿¡ ÀÇÇØ ±â»ý¼ÒÀÚ Àü·ù°¡ À¯±âµÇ¸ç ÀÌ Àü·ù°¡ ¹æ»ç

¤· ±¸Á¶

- ¹Ý»ç±â(reflector) + ±ÞÀü±â(feeder, exciter, driver) + ÁöÇâ±â(director)

     http://yagiudaantenna.tripod.com/basicstucture/1.JPG

- ¹Ý»ç±â: 1°³ ´ÙÀÌÆú ¶Ç´Â ´ÙÀÌÆúÀ» ÀÌ¿ëÇÑ ÄÚ³Ê ¹Ý»ç°æ ÇüÅÂ, ±æÀÌ ¾à 0.48ÆÄÀå

- ±ÞÀü±â: ¹ÝÆÄÀå ´ÙÀÌÆú, ´ÙÀÌÆú ¶Ç´Â folded dipole (Á¾ÀÌ Å¬¸³Çü ´ÙÀÌÆú), ±æÀÌ ¾à 0.46 ÆÄÀå

- ÁöÇâ±â: °¹¼ö¿¡ µû¶ó À̵æ Áõ°¡. °¹¼ö°¡ Áõ°¡ÇÔ¿¡ µû¶ó ÀÌµæ Æ÷È­, ±æÀÌ ¾à 0.40 ÆÄÀå

 

- ¹Ý»ç±â¿Í ±ÞÀü±â: ¾à 0.20 ÆÄÀå

- ±ÞÀü±â¿Í ÁöÇâ±â: 0.075 ÆÄÀå 0.40 ÆÄÀå (¼³°è¿¡ µû¶ó ´Ù¸§). ±ÕÀÏ °£°Ý ¶Ç´Â ºñ±ÕÀÏ °£°Ý Àû¿ë

 

- ÁöÁö´ë(boom)ÀÇ ¿µÇâ: ³»±¸¼ºÀ» À§ÇØ ±Ý¼Ó »ç¿ë, ÁöÁö´ë »ç¿ë¿©ºÎ¿¡ µû¶ó ¼ÒÀÚ±æÀÌ Á¶Á¤, ÁöÁö´ë°¡ ÀÖÀ» ¶§ ¹Ý»ç±â¿Í ÁöÇâ±â Å©±â Áõ°¡

- ¼ÒÀÚ¿Í ÁöÁö´ëÀÇ Àý¿¬: ºñÀý¿¬, Àý¿¬

 

- ¼ÒÀÚ Á÷°æ: ±â°èÀû °­µµ¸¦ °í·ÁÇÏ¿© ¼³Á¤. ¼ÒÀÚÁ÷°æ¿¡ µû¶ó ¼ÒÀÚ±æÀÌ ´Þ¶óÁø´Ù.

 

¤· µ¿ÀÛ¿ø¸®

Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, or to obtain a text description, please contact npg@nature.com

- ±ÞÀü±â(exciter)¿¡ Àü·ù °ø±Þ

- ÁöÇâ±â(Director¸¦ Ÿ°í ÀüÆÄ°¡ director ¹æÇâÀ¸·Î ÁøÇà

- Reflector´Â ÀüÆÄ°¡ director ¹Ý´ë¹æÇâÀ¸·Î ÇâÇÏ´Â °ÍÀ» ¹æÁö

 

- ±ÞÀü±â + ¹æ»ç±â

File:Yagi en.svg

- ±ÞÀü±â + ¹Ý»ç±â + ¹æ»ç±â

 

3–element-Yagi, superposition of the power caused by the reflector, radiator and director, © 2011 Christian Wolff www.radartutorial.eu

 

3. ¾ß±â¾ÈÅ׳ª ¼³°èÇÁ·Î±×·¥

¤· Yagi Calculator v.2.6.10 by John Drew (VK5DJ), http://www.vk5dj.com/yagi.html

 

½ºÄµ0014.tif

 

¤· ¹Ý»ç±â(reflector)¿Í ÁöÇâ±â(director)´Â ±Ý¼Ó ÁöÁö´ë¿Í Àý¿¬½ÃŰÁö ¾Ê¾Æµµ µÇ³ª ±ÞÀü±â(exciter)´Â ¹Ýµå½Ã Àý¿¬½ÃÄÑ¾ß ÇÑ´Ù.

 

¤· ¼ÒÀÚ¼ö¿¡ µû¸¥ À̵æ

À̵æ 10dB: ¹Ý»ç±â 1°³, ±ÞÀü±â 1°³, ÁöÇâ±â 3°³

À̵æ 15dB: ¹Ý»ç±â 1°³, ±ÞÀü±â 1°³, ÁöÇâ±â 10°³

À̵æ 18dB: ¹Ý»ç±â 1°³, ±ÞÀü±â 1°³, ÁöÇâ±â 21°³

 

4. ½Ç½À

4.1. Yagi Calculator v.2.6.10 by John Drew (VK5DJ), http://www.vk5dj.com/yagi.html¿¡¼­ ¾ß±â ¾ÈÅ׳ª ¼³°èÇÁ·Î±×·¥À» ´Ù¿î¹Þ¾Æ ¼³Ä¡Ç϶ó.

 

4.2. À§ ÇÁ·Î±×·¥¿¡¼­

1) ¼³°è 1

¤· [Task] ¡æ [Design Yagi]¸¦ ½ÇÇàÇ϶ó.

¤· ´ÙÀ½°ú °°ÀÌ ¼³Á¤Ç϶ó. ³ª¸ÓÁö´Â default °ª(¿ø·¡ ¼³Á¤µÇ¾î ÀÖ´Â °ª)À¸·Î Ç϶ó.

Frequency in MHz = 1575

Diameter of dipole bend mm = 10

Dipole gap at feed point mm = 2

 

Number of directors = 4

Cross-section of boom mm = 2.2 (www.yeeuntech.com YET-085/50-TP »ç¿ë)

Boom type: Round

 

Construction of directors/reflector:

     Metal shape = Round

     Director/Reflector mounting = bonded through metal boom

     Diameter of element(mm) = 2.2 (www.yeeuntech.com YET-085/50-TP »ç¿ë)

 

Construction of Dipole
Metal shape = Round

     Folded dipole mounting = Fully insulated

     Diameter of element(mm) = 2.2(www.yeeuntech.com YET-085/50-TP »ç¿ë)

 

À§¿Í °°ÀÌ ¼³Á¤ÇÑ ÈÄ [Calculate] ¹öưÀ» Ŭ¸¯Ç϶ó. À§ 3.1Ç×°ú °°Àº µ¥ÀÌÅ͸¦ ¾ò´ÂÁö È®ÀÎÇ϶ó.

- ¼³°èµÈ ¾ß±â ¾ÈÅ׳ª Ư¼º: 1575MHz (ÆÄÀå 190m), À̵æ 11dBi, ¼ÒÀÚ Á÷°æ 2.2mm, ÁöÁö´ë Á÷°æ 2.2mm,

  ÁöÁö´ë¿Í ¹Ý»ç±â/ÁöÇâ±â ºñÀý¿¬

- Ä¡¼ö

¹Ý»ç±â: ±æÀÌ 92.8, ÁöÁö´ë ÇÑÂÊ ³¡(z = 0)À¸·ÎºÎÅÍ À§Ä¡ z = 3(ÇÁ·Î±×·¥¿¡¼­´Â 30À¸·Î ³ª¿À³ª boom ±æÀ̸¦ ÁÙÀ̱â À§ÇØ 30 ¡æ 3·Î º¯°æ)

±ÞÀü±â: ´ÙÀÌÆú »ç¿ë(folded dipole »ç¿ëÇÏÁö ¾ÊÀ½). ±æÀÌ 88.4, À§Ä¡ z = 31

ÁöÇâ±â 1: ±æÀÌ 80.9, À§Ä¡ z = 55.3

ÁöÇâ±â 2: ±æÀÌ 79.9, À§Ä¡ z = 89.6

ÁöÇâ±â 3: ±æÀÌ 78.9, À§Ä¡ z = 130.5

ÁöÇâ±â 4: ±æÀÌ 78.0, À§Ä¡ z = 178.1

 

2) À§ ¼³°è 1¿¡¼­ ´ÙÀ½°ú °°ÀÌ º¯È­¸¦ Áָ鼭 °á°ú¸¦ °üÂûÇ϶ó

- Directors/Reflector mounting: non metal boom (orf standoffs)

- Construction of directors/reflector: Diameter of element (mm) = 4.0

- Construction of Dipole: Diameter of element (mm) = 4.0

 

À§ °æ¿ì ¸ðµÎ ±ÞÀü±â, ÁöÇâ±â, ¹Ý»ç±âÀÇ ±æÀ̸¸ º¯°æµÊÀ» ¾Ë ¼ö ÀÖ´Ù.

 

3) À§ ¼³°è 1¿¡¼­ ´ÙÀ½°ú °°ÀÌ ÁöÇâ±â ¼ö 40À¸·Î ÇÏ°í °á°úÇ¥¿¡¼­ ÁöÇâ±â ¼ö¿¡ µû¸¥ À̵æÀ» È®ÀÎÇ϶ó.

     1: 6.9dBi

     2: 8.6dBi

     3: 9.9dBi

     4: 11.0dBi

     8: 13.9dBi

     12: 15.7dBi

     16: 16.9dBi

     20: 17.9dBi

     30: 19.4dBi

     40: 20.4dBi

    

4.3. À§ ¼³°è 1ÀÇ Ä¡¼ö¸¦ Microwave Studio·Î »ý¼ºÇÑ ÈÄ ¾Æ·¡ ±×¸²À» Âü°í·Î¿Í °°ÀÌ simulationÀ» ¼öÇàÇ϶ó.

4

¤· ´ÙÀÌÆú Ãà x ¹æÇâ, ÁöÁö´ë Ãà z ¹æÇâÀ¸·Î Ç϶ó.

¤· ÁöÁö´ëÀÇ ÇÑÂÊ ³¡À» z = 0À¸·Î Ç϶ó.

 

     ÁöÁö´ë ¹°Áú: PEC

     ¹Ý»ç±â¿Í ÁöÇâ±â: Á÷°æ 2.2mm solid metal

     ±ÞÀü±â: Á÷°æ 2.2mm solid metalÀ» ÇÁ·Î±×·¥¿¡¼­ °è»êÇÑ ±æÀÌ·Î »ý¼º ÈÄ Áß°£¿¡¼­ 2mm ±¸°£À» Á¦°ÅÇϰí discrete port·Î ±ÞÀü, ÁöÁö´ë·ÎºÎÅÍ 1mm À§·Î ¶ç¿ò.

     ÁöÁö´ë: Á÷°æ 2.2mm ±æÀÌ 180mm, ÁÂÇ¥ ¿øÁ¡ (z = 0)

     ÇØ¼®Á֯ļö: 1000-2000MHz

     À̵æ°è»ê Á֯ļö: 1575MHz

 

     ±ÞÀü±â ¼ÒÀÚ ¿Ü¿¡ ÁöÇâ±â¿Í ¹Ý»ç±â´Â ÁöÁö´ë(boom)¿¡ Á¢Ã˽ÃŲ´Ù.

 

¤· ¾ÈÅ׳ª Çü»ó »ý¼º ÈÄ ½Ã¹Ä·¹À̼ÇÀ» ¼öÇàÇ϶ó.

 

¤· ¾ÈÅ׳ª ±¸Á¶¸¦ µµ½ÃÇ϶ó. (10Á¡)

¤· S11(dB)¸¦ 1000−2000MHz¿¡ °ÉÃļ­ µµ½ÃÇ϶ó. (10Á¡)

¤· S11À» 1000−2000MHz¿¡ °ÉÃļ­ Smith Chart¿¡ µµ½ÃÇ϶ó. (10Á¡)

¤· ÀÔ·Â ÀÓÇÇ´ø½º¸¦ 1000−2000MHz¿¡ °ÉÃļ­ »ç°¢Çü ±×·¡ÇÁ¿¡ µµ½ÃÇ϶ó. (10Á¡)

¤· 1575MHz¿¡¼­ ÁöÇâµµ DabsÀÇ 3Â÷¿ø ÆÐÅÏÀ» µµ½ÃÇ϶ó. (10Á¡)

¤· 1575MHz¿¡¼­ ÁöÇâµµ DabsÀÇ Àü°è¸é ÆÐÅÏ(phi = 0¡Æ, theta = 0¡Æ−360¡Æ º¯È­)À» polar plotÀ¸·Î µµ½ÃÇ϶ó. (10Á¡)

¤· 1575MHz¿¡¼­ ÁöÇâµµ DabsÀÇ ÀÚ°è¸é ÆÐÅÏ(phi = 90¡Æ, theta = 0¡Æ−360¡Æ º¯È­)À» polar plotÀ¸·Î µµ½ÃÇ϶ó. (10Á¡)

 

5. Á¦ÀÛ ¹× ÃøÁ¤

5.1 À§ ±×¸²À» Âü°í·Î ¼³°è 1ÀÇ ¾ß±â ¾ÈÅ׳ª¸¦ Á¦ÀÛÇ϶ó. Á¦ÀÛ»çÁøÀ» º¸°í¼­¿¡ ÷ºÎÇ϶ó(50Á¡)

5.2 Á¦ÀÛµÈ ¾ÈÅ׳ªÀÇ ¹Ý»ç°è¼ö¸¦ 1000-2000MHz¿¡¼­ ÃøÁ¤Ç϶ó(20Á¡)

     - |S11|(dB)¸¦ rectangular plotÀ¸·Î µµ½ÃÇ϶ó.

     - S11À» ½º¹Ì½º µµÇ¥¿¡ µµ½ÃÇ϶ó.

5.3 Á¦ÀÛµÈ ¾ÈÅ׳ªÀÇ À̵æÀ» ÃøÁ¤Ç϶ó (30Á¡)

 

6. Âü°íÀÚ·á

¤· 1575MHz 6-¼ÒÀÚ ¾ß±â ´ÙÀÌÆú ¾ÈÅ׳ª ¼³°èµµ¸é

¤· ¾ß±â¾ÈÅ׳ª °øºÎÀÚ·á