韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月論文 2010-21-12-03 On Reducing the Shadow Region for Extending the Service Area of TBN-Jeonju Broadcasting 김태훈 이문호 이미성 조계문 Tae-Hoon Kim*, ** Moon Ho Lee* Mi Sung Lee* Kye Mun Cho* 요약 6, 8 FM 102.5 MHz,, (,,,, ). 102.5 MHz( ) 100.7 MHz( KBS) 99.1 MHz( MBC), 3,,.,., FM EBS 106.9 MHz( ),., EBS,. EBS KBS ( 48 dbμv/m) FM. Abstract In this paper, we investigated the shadow area of radio programs which are currently being broadcast via FM 102.5 MHz in Jeollabuk-do consisting of 6 cities and 8-guns. The field strength data of FM 102.5 MHz was used with criterion of shadow area. As a result, the field strength of the eastern mountainous area in Jeollabuk-do was very low. We also measured, compared and analyzed the field strength of 102.5 MHz(TBN-Jeonju), 100.7 MHz(KBS) and 99.1 MHz (MBC) in Jeollabuk-do. Based on the field strength data, we tried to find what correlation exists and how much influence is between difference of antenna output power and solution of shadow area. In result, enhancement of antenna output power is not solution in terms of reducing the shadow Area of 102.5 MHz(TBN-Jeonju). In addition, we measured, compared and analyzed the field strength of 102.5 MHz(TBN-Jeonju) and 106.9 MHz(EBS). In fact, the relay stations with 104.1 MHz, 104.9 MHz, 105.3 MHz and 107.5 MHz of EBS FM has a number of FM relay stations in the eastern mountainous area of Jeollabuk-do. As a result, we confirmed that EBS almost did not have shadow area in the eastern mountainous area of Jeollabuk-do based on the field strength data. As in the case of EBS and KBS, we suggest installing TBN-Jeonju FM relay station with the best solution to reducing the shadow area to extend the audible range of TBN-Jeonju. Key words : Field Strength, Shadow Area, Relay Station, TBN-Jeonju, EBS, KBS (WCU) R32-2009-000-20014-0 2010-0020942 NRF( ),. *, ** 2009. * (Division of Electronics & Information Engineering, Chonbuk National University) ** (TBN(Traffic Broadcasting Network)-Wonju) : 20100716-088 : (e-mail : moonho@chonbuk.ac.kr) : 2010 11 15 1352
. 서론 TBN(Traffic Broadcasting Network, FM 1 kw, 102.5 MHz), EBS(Educational Broadcasting System, FM 5 kw, 106.9 MHz), KBS(Korean Broadcasting System, FM 5 kw, 100.7 MHz), MBC(Munhwa Broadcasting Corporation, FM 5 kw, 99.1 MHz) (service area). [8] FM 102.5 MHz 1.. (,,,, ),..,,. ( ) 1 kw,, FM,, 30 40 km, (,,,, 20 ). FM. TBN(102.5 MHz),, ( ). TBN (102.5 MHz).. 2, 3, 4. 1-1 전북권내동부산악지역에대한이해 2002,. (1, 4 ) 2009 1. 710,550 1,874,550 11 % [2].,,. 2002 509,148 2006 617,567 21 % [3]. 2002 2009 2002 8,230,823 2009 14,391,868 75 % 표 1. (1, 4 ) (2009 ) Table 1. Population of the eastern mountain area(2009). 35,337 13,143 11,172 11,955 10,148 81,775 ( ) 89,123 31,183 26,213 27,497 24,143 198,156 1353
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 2. ( ) [4] Table 2. Vistors to local tourist attractions(people) [4]. 2002 3,261,482 417,468 3,294,407 685,538 571,928 8,230,823 2009 3,958,970 1,912,666 7,127,219 1,009,987 743,026 14,391,868 표 3. ( / ) [5],[6] Table 3. The average traffic volume by highway(cars/daily) [5],[6]. 12 (88 ) 20 ( - ) 30 ( - ) 2002 8,507 X(2007 ) 11,007 19,517 2007 7,981 19,272 31,892 59,145. 2. 2002 2007 203 %., 2002 traffic.. 전계강도측정및비교, 분석 2-1 방송구역전계강도의산출방법 4 [7], [10] [12]. V m (1),,,. FM TV, (service area)., (2). 표 4. Table 4. Criteria of field strength for noise levels. (dbμv/m) 77 74 71 70 60 48* ( VHF 74 68 54 ) 4 m UHF 70. * 48[dBμV/m] : service area. LOW VHF 28 HIGH VHF 36 UHF 41 45 9 m. 2 m. 1354
V m (2),,. VHF,., 90,,.,,. 그림 2. Fig. 2. Field strength comparison graph in Jeonju.,,, sin.,,., sin (2),, 그림 3. Fig. 3. Field strength comparison graph in Wanju.. 1 R3132 60 300 MHz VHF. 2-2 전주교통방송전계강도측정및비교 분석 6, 8, (a) VHF ANT. (a) VHF dipole antenna (b) (b) Spectrum analyzer(r3132) 그림 1. Fig. 1. Field strength measuring equipment connection diagram. 1355
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 5. ( : dbμv/m) Table 5. Field strength in Jeonju(Unit: dbμv/m). 1 58.4 66.6 62.5 2 47.1 58.8 53.0 3 63.2 69.0 60.4 4 69.6 77.0 78.3 5 55.9 61.4 55.3 6 64.2 78.7 72.5 7 1 68.3 75.8 75.2 8 2 75.6 82.8 76.2 9 71.2 75.7 75.4 10 68.9 76.2 71.0 5 kw 100.7 MHz( KBS) 99.1 MHz( MBC), 1 kw,. 5., 68( : dbμv/m). 5 kw KBS, MBC 1 kw TBN 7(dBμV/m). 6, 5 kw KBS MBC 1 kw TBN,. 7, 5 kw 표 6. ( : dbμv/m) Table 6. Field strength in Wanju(Unit: dbμv/m). 1 23.0 36.4 29.7 2 52.4 68.8 56.5 3 52.5 60.6 53.9 4 49.2 66.3 59.9 5 17 40.5 45.9 36.5 6 32.6 46.9 39.8 7 33.9 45.8 32.8 8 51.2 54.8 48.8 9 56.3 60.3 52.6 10 66.6 65.8 65.4 11 54.2 80.3 75.6 12 21 IC 78.0 88.9 83.0 13 50.7 56.4 50.2 14 39.9 45.1 41.4 15 40.6 51.5 40.5 1356
표 7. ( : dbμv/m) Table 7. Field strength in Iksan(Unit: dbμv/m). 1 55.0 50.3 66.2 2 42.2 52.1 60.3 3 44.3 61.1 51.1 4 50.2 48.2 57.3 5 50.6 64.6 60.2 6 51.4 67.6 66.2 7 26, 23 55.4 68.1 70.6 8 42.5 62.8 59.5 9 46.6 62.7 52.9 10 39.8 38.6 43.7 표 8. ( : dbμv/m) Table 8. Field strength in Gunsan(Unit: dbμv/m). 1 50 68.5 56.2 2 49.1 56.8 57.5 3 62.3 66.7 60.6 4 49.0 57.9 53.5 5 44.9 59.1 57.8 6 47.5 61.9 71.3 7 34.3 47.6 58.2 8 33.4 47.3 57.3 그림 4. Fig. 4. Field strength comparison graph in Iksan. 그림 5. Fig. 5. Field strength comparison graph in Gunsan. KBS MBC 1 kw TBN,. 8, 5 kw KBS MBC 1 kw TBN. 1357
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 9. ( : dbμv/m) Table 9. Field strength in Gimje(Unit: dbμv/m). 1 26 48.9 63.3 57.6 2 21 IC 44.8 61.5 65.4 3 49.9 67.1 58.6 4 56.3 65.3 59.6 5 62.9 66.2 63.1 6 62.9 68.9 59.7 7 56.3 67.1 63.1 8 66.4 67.7 70.5 9 64.1 56.4 64.7 표 10. ( : dbμv/m) Table 10. Field strength in Buan(Unit: dbμv/m). 1 68.7 66.9 66.8 2 59.4 59.5 60.5 3 43.5 42.6 40.7 4 53.4 51.7 42.6 5 35.4 35.2 32.3 6 38.4 41.1 39.5 7 30 41.1 46.7 45.7 8 51.5 48.5 56.0 9 67.5 67.4 72.5 10 57.2 60.6 55.5 11 64.8 69.0 68.2 그림 6. Fig. 6. Field strength comparison graph in Gimje. 5. 9, 5 kw 그림 7. Fig. 7. Field strength comparison graph in Buan. KBS MBC 1 kw TBN, 1358
표 11. ( : dbμv/m) Table 11. Field strength in Jeongeup(Unit: dbμv/m). 1 40.8 49 40 2 63.9 62 66 3 60.8 70 71 4 36.2 41 30 5 28.9 30 34 6 54.4 58 57 그림 8. Fig. 8. Field strength comparison graph in Jeongeup. 그림 10. Fig. 10. Field strength comparison graph in Limsil. 그림 9. Fig. 9. Field strength comparison graph in Gochang. 3. 10, 5 kw KBS, MBC 1 kw TBN. 3. 11, 5 kw KBS, MBC 1 kw TBN. 12. 5 kw KBS, MBC 1 kw TBN. 13. 5 kw KBS MBC 1 kw TBN, 3. 14.. 3. KBS. TBN, MBC KBS. 15 1359
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 12. ( : dbμv/m) Table 12. Field strength in Gochang(Unit: dbμv/m). 1 24.5 26 27 2 28.8 30 34 3 35.2 40 40 4 29.8 29 37 5 32.4 38 38 6 54.3 60 63 표 13. ( : dbμv/m) Table 13. Field strength in Limsil(Unit: dbμv/m). 1 17 51.8 57.5 61.8 2 47.2 53.1 57.6 3 69.9 65.2 81.8 4 73.0 65.5 70.5 5 37.6 28.9 33.9 6 36.4 33.2 42.4 7 29.8 29 37 표 14. ( : dbμv/m) Table 14. Field strength in Sunchang(Unit: dbμv/m). 1 27 30.0 23.2 32.7 2 27, 21 28.7 24.2 33.4 3 26.3 22.9 31.2 4 34.5 20.8 25.7 표 15. ( : dbμv/m) Table 15. Field strength in Namwon(Unit: dbμv/m). 1 17 42.0 34.9 54.2 2 29.4 24.7 38.1 3 33.2 26.0 39.1 4 24.7 24.6 30.5 5 30.9 22.6 35.5 6 23.4 21.6 29.0 7 51.4 40.0 51.5 8 27.1 25.7 23.5 9 34.4 32.7 40.3 1360
그림 11. Fig. 11. Field strength comparison graph in Sunchang. 그림 13. Fig. 13. Field strength comparison graph in Muju. 그림 12. Fig. 12. Field strength comparison graph in Namwon. 그림 14. Fig. 14. Field strength comparison graph in Jinan. 표 16. ( : dbμv/m) Table 16. Field strength in Muju(Unit: dbμv/m). 1 28.8 33.4 31.5 2 21.5 22.5 20.6 3 IC 26.6 41.0 34.1 4 27.6 40.5 29.3. TBN MBC 1 kw 5 kw. 16 TBN, KBS, MBC 3.., KBS EBS. 17,. 18,,,,.., 1361
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 17. ( : dbμv/m) Table 17. Field strength in Jinan(Unit: dbμv/m). 1 41.3 42.5 37.4 2 ( ) 31.6 42.5 35.1 3 22.6 28.3 21.5 4 21.5 28.7 24.7 5 44 ( ) 28.3 43.3 36.1 6 22.3 24.9 23.2 7 20.9 23.9 22.6 표 18. ( : dbμv/m) Table 18. Field strength in Jangsu(Unit: dbμv/m). 1 32.3 34.1 41.0 2 30.7 36.2 40.7 3 ( ) 18.2 20.8 20.1 4 25.3 27.7 26.0 그림 15. Fig. 15. Field strength comparison graph in Jangsu.. 2-3 동부산악지역전계강도결과분석 6, 8 TBN, KBS, MBC, (,,,, ). 19 6, 8. KBS, MBC 5 kw 1 kw..,.,. 3 [8]. 16 3,.,. 2-4 전주교통방송과 KBS, EBS의전계강도비교및분석 1362
표 19. ( : dbμv/m) Table 19. The average field strength measurements of the radio stations(unit: dbμv/m). TBN 64 48 48 46 57 53 48 34 50 30 33 26 27 27 KBS 72 58 58 58 65 54 52 37 47 23 28 34 33 30 MBC 68 51 59 59 62 53 50 40 55 31 38 29 29 32 표 20. EBS FM Table 20. EBS FM radio relay stations in Chonbuk. EBS FM FM FM FM FM 105.3 MHz 104.9 MHz 104.1 MHz 105.3 MHz 107.5 MHz 100 W 100 W 100 W 100 W 3 kw CP ring CP ring CP ring CP ring CP ring 3 db 2 db 0.2 db 0.2 db 6.5 db 838 m 176 m 337 m 696 m 1,512 m *, dbμv 그림 16. 3 Fig. 16. The average local field strength measurements of the radio stations. FM KBS, EBS,. KBS ( ), EBS( ) FM, 106.9 MHz, 3 kw. EBS FM 5 FM,. EBS FM 5 20. 21. TBN, EBS. 21. 3 kw 106.9 MHz(EBS). 21. 5:, 4:, 3:, 2:, 1:. EBS EBS FM. FM. 22 102.5 MHz EBS 106.9 MHz. (102.5 MHz) EBS(106.9 MHz).. 17 18 EBS 102.5 MHz(TBN) 106.9 MHz(EBS). 1363
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 21., ( TBN vs EBS, -dbμv) Table 21. Field strength measurements of main cities and guns in Chonbuk(TBN-Jeonju vs EBS, Unit-dBμV). No TBN(102.5 MHz) EBS(106.9 MHz) 1 72.66(5) 77.32(5) 26 m 2 52.72(5) 73.13(5) 83 m 3 1 39.43(5) 52.53(5) 32 m 4 8 37.98(5) 48.70(5) 18 m 5 47.75(5) 60.48(5) 28 m 6 43.52(5) 50.51(5) 24 m 7 35.06(5) 25.84(5) 17 m 8 34.55(5) 42.31(5) 242 m 9 22.70(2) 22.88(2) 94 m 10 19.53(1) 24.13(2) 384 m 11 19.82(1) 27.95(2) 236 m 12 19.17(1) 24.66(2) 387 m 13 24.60(2) 19.71(1) 59 m 14 22.68(2) 24.63(2) 210 m 표 22. ( TBN vs EBS) Table 22. Field strength measurements of Muju(TBN-Jeonju vs EBS). TBN(102.5 MHz) EBS(106.9 MHz) EBS(104.1 MHz) EBS(104.9 MHz) 19.82(1) dbμv 27.95(2) dbμv 71.80(5) dbμv 19.25(1) dbμv 21.85(2) dbμv 65.83(5) dbμv.. 1,614 m., FM,,,. 19 20 EBS 102.5 MHz(TBN) 106.9 MHz(EBS).. 21 22 EBS 104.1 MHz( ) EBS 104.9 MHz( ). 71.80 dbμv 65.83 dbμv, (5). EBS,.,,, 23... 1364
그림 17. TBN (102.5 MHz) Fig. 17. TBN field strength of Muju-eup(102.5 MHz). 그림 20. EBS (106.9 MHz) Fig. 20. EBS field strength of Muju-Seolchun. 그림 18. EBS (106.9 MHz) Fig. 18. EBS field strength of Muju-eup(106.9 MHz). 그림 21. EBS 104.1 MHz ( ) Fig. 21. 104.1 MHz field strength(muju-eup). 그림 19. TBN (102.5 MHz) Fig. 19. TBN field strength of Muju-Seolchun(102.5 MHz).,. EBS. 24 EBS 106.9 MHz 3 kw 그림 22. EBS 104.9 MHz ( - ) Fig. 22. 104.9 MHz field strength(muju-seolchun). 19.71 dbμv.. 1365
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 23. ( TBN vs EBS) Table 23. Field strength measurements of Jangsu(TBN-Jeonju vs EBS). TBN(102.5 MHz) EBS(106.9 MHz) EBS(105.3 MHz) 19.17(1) dbμv 24.66(2) dbμv 48.66(5) dbμv 표 24. ( TBN vs EBS) Table 24. Field strength measurements of Gochang(TBN-Jeonju vs EBS). TBN(102.5 MHz) EBS(106.9 MHz) EBS(104.9 MHz) 24.60(3) dbμv 19.71(1) dbμv 80.62(5) dbμv 표 25. ( TBN vs EBS) Table 25. Field strength measurements of Namwon(TBN-Jeonju vs EBS). TBN(102.5 MHz) EBS(106.9 MHz) EBS(107.5 MHz) 22.68(2) dbμv 24.63(2) dbμv 52.68(5) dbμv 25 EBS 106.9 MHz 3 kw. 3 kw. EBS 107.5 MHz 52.68 dbμv.. 전주교통방송팔공산중계소제안,. 5 kw KBS, MBC,,.. FM. (1,915 m), (1,614 m), (1,290 m), (1,278 m), (1,237 m), (1,242 m).. (1,915 m), (1,614 m), (1,290 m), (1,278 m), (1,237 m), (1,242 m) FM,, FM., TBN. KBS, MBC, SKT,, FM. ORDER.,,,,,, FM. FM 26, 27, (1). 1366
표 26. FM Table 26. Basis for calculating service area of Jangsu FM relay station. 0.5 KW 88 108 MHz 3.2 db 1.0 db 1.2 dbk 표 27. FM (8 ) Table 27. Field strength data of Jangsu FM relay station(8-way). (km) E o(db) P e(dbk) P l(db) S(dB) E(dB) H e(m) 0 25 65.17 1.2 5.03 21 48 309 45 23 74.43 1.2 4.77 30 48 653 90 25 70.67 1.2 1.53 23 48 398 135 30 71.18 1.2 1.02 23 48 612 180 30 70.97 1.2 0.23 22 48 670 225 52 60.85 1.2 0.35 12 48 862 270 47 63.17 1.2 1.03 15 48 795 315 45 67.39 1.2 1.81 20 48 723 CP ring antenna. CP ring antenna. CP ring [9]. E = E o + P e P l S (3), E o (dbk) P e 1 kw (db), P l (db), S (db), H e (m)( (789m) ). 23 FM 그림 23. FM ( ) Fig. 23. Broadcasting area of Jangsu FM relay station (Mountain Palgong). 그림 24. FM (500 W) Fig. 24. Field strength distribution of Jangsu FM relay station(500 W)., FM service area(%) 28 24. FM CP RING 500 W service area(%) 28 24. 25 26 FM. KBS, MBC, SKT,. 26 FM. FM 1367
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 표 28. FM service area(500 W) Table 28. Broadcasting service area of Jangsu FM relay station(500 W). (km 2 ) (km 2 ) service area(%) 607.46 58.04 9.56 354.01 202.52 57.21 544.27 198.16 36.41 749.10 479.64 64.03 629.76 90.80 14.42 492.81 162.92 33.06 500.29 160.16 32.01 820.56 134.24 16.36 508.13 276.24 54.36 596.49 401.52 67.31 531.87 397.64 74.76 111.31 21.84 19.62 94.88 2.96 3.12 697.73 160.28 22.97 788.78 295.60 37.48 표 29. FM 500 W service area(%) Table 29. Broadcasting service area of Muju FM relay station(500 W). service area(%) 629.76 453.24 71.97 531.87 152.24 28.62 788.78 282.08 35.76 60.80 22.04 36.25 576.44 303.00 52.56 583.31 108.84 18.66 852.16 292.56 34.33 540.97 124.20 22.96 176.35 23.48 13.31 FM, 26 29 35 ( ) 57 ( ). 28 service area(%) service area(%).,, service area(%).. 결론 6, 8 (102.5 MHz) 1368
그림 25. FM ( ) Fig. 25. Broadcasting area of Muju FM relay station (Mountain Jeoksang). KBS, MBC 5 kw,.. FM KBS (100.7 MHz), EBS(106.9 MHz) - -,,, KBS, EBS FM FM. 참고문헌 그림 26. FM 500 W (500 W) Fig. 26. Field strength distribution of Muju FM relay station(500 W).. 48[dBμV/m],,,. (,,,, ). KBS (100.7 MHz) MBC(99.1 MHz), 3,,., 1 kw [1],,, 2002. [2], 49, 2009. [3], 47, 2008. [4], http://www.tour.go.kr [5],, 2002. [6],, 2007. [7] 2008-17,,, 2008 5. [8], FM 102.5 MHz service area,, 2007. [9] ( ), http://www.highgain.co.kr [10],, 2001. [11],,,, 1966. [12],,,,, 1975. [13],,, 1976. 1369
韓國電磁波學會論文誌第 21 卷第 12 號 2010 年 12 月 2001 2 : ( ) 2001 2 : ( ) 2010 8 : ( ) 2006 4 : [ 주관심분야 ] 2009 2 : ( ) 2009 3 : [ 주관심분야 ],, Cooperative Relay Network, STBC 1983 : 1984 2 : ( ) 1985 1986 : University of Minnesota (Post DOC.) 1990 : ( ) 1970 1980 : MBC 1980 10 2010 2 : 2010 2 : WCU- [ 주관심분야 ] 2008 2 : ( ) 2010 2 : ( ) [ 주관심분야 ],, 1370