| 4 포트 동위상 고출력 전력결합기의 구현에 관한 연구 |
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이영섭, 전중성, 이석정, 예병덕, 김동일, 홍창희 |
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| A Study on the Fabrication of the 4 Port In-Phase High Power Combiner |
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Young-Sub Lee, Joong-Sung Jeon, Seok-Jeong Lee, Byeong-Duck Ye, Dong-Il Kim, Tchang-Hee Hong |
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| Abstract |
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The broadband high power 3-way combiner was designed and fabricated for the digital TV repeater. To achieve increase of the bandwidth and the high power capability, Wilkinson type power divider was adopted in our research. First of all, Wilkinson type power divider of equal-split and unequal-split were combined, and the characteristics of the four port in-phase power combiner was simulated for each thickness of dielectric substrates. As the results of simulation, the power combiner fabricated by using dielectric substrate of 120 mil-thickness has the characteristics as follows: insertion loss of less than -6.53 ㏈, reflection coefficient of less than -13 ㏈, isolation among the output ports of less than -15 ㏈, and phase difference among the output ports of smaller than 13°. Therefore, this power combiner was possible to improve the limit of microstrip line width due to high impedance, the problems of power loss due to interaction between strip lines in a high power combiner and narrow bandwidth simultaneously. Furthermore, making broadband and high power could be achieved since the fabricated 3-way combiner has good characteristics of insertion loss, the reflection coefficient, separation between ports, and phase difference. |
| Key Words:
디지털 TV;
Combiner;Digital TV;Wilkinson;divider |
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