• Title/Summary/Keyword: 전력분배기

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Design of 4-Way Wilkinson Divider with Waveguide to Stripline Transition Used in The Monopulse Radar Front-end (도파관 천이 구조를 갖는 모노펄스 레이더용 4-Way 윌킨슨 분배기 설계)

  • Koh, Young-Mok;Ra, Keuk-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.11
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    • pp.69-76
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    • 2010
  • From the present paper we researched about the design of 4-Way Wilkinson divider with waveguide to stripline transition which used to split the LO signal with equi-amplitude and equi-phase in the X-Band Monopulse radar RF front-end. The monopulse radar front end operating in the X-Band is composed of 3 waveguide reception mixers which down convert sum, azimuth and elevation signal to IF and one SSB waveguide mixers which generate X-Band test signal. It is required the 4-way divider with low loss, equi amplitude and equiphase splitting the LO signal to provide the LO signal to each mixer consisting RF frontend. In this paper we designed and fabricated the 4-Way Wilkinson divider with waveguide transition to divide the LO signal into equi-amplitude and equi-phase. The fabricated Wilkinson divider have the insertion loss 6.8dB, VSWR 1.06~1.28, and phase balance maximum 4.5degree for each output ports.

Design of a Compact Wilkinson Power Divider Using Meta-Material Lines (Meta-Material을 이용한 소형 Wilkinson 전력 분배기 설계)

  • Kim, Jeong-Pyo;Kim, Gi-Ho;Yang, Myo-Geun;Seong, Won-Mo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.10 s.113
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    • pp.953-958
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    • 2006
  • A compact Wilkinson power divider with meta-material transmission line(MM-TL) is proposed. The divider is designed by adding the MM-TL with $+90^{\circ}$ phases shifting instead of the ${\lambda}_g/4$ with $-90^{\circ}$ phases shifting at a simple Wilkinson power divider. The MM-TL consists of three phase shifter unit cells and each cell has the characteristics of the $30^{\circ}$ phases shilling and 6 mm length. Therefore, the length of ${\lambda}_g/4(210 mm)$ TL with $-90^{\circ}$ phases shifting at a simple Wilkinson power divider can be reduced to 18 mm and the Wilkinson divider is very compact.

Power Dividers for High Splitting Ratios using Transmission Line Connected with Open and Short Stubs (단선과 단락 스터브가 연결된 전송선로를 이용한 높은 분배비율을 갖는 전력 분배기)

  • Kim, Young
    • Journal of Advanced Navigation Technology
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    • v.25 no.3
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    • pp.229-235
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    • 2021
  • This paper proposes a method of implementing an unequal power divider for high splitting ratios by using transmission lines connected with open and short stubs. The proposed method is an equivalent circuit analysis of a transmission line with an additional port so that it can be converted to an arbitrary impedance in the center of a 2-port transmission line and a 3-port transmission line with an open or short stub connected in parallel to each port. To prove the validity of this method, a Wilkinson power divider with k2 = 20 dB splitting ratio and a Gysel power divider with k2 = 17 dB splitting ratio were designed at a center frequency of 1 GHz using a 3-port transmission line equivalent circuit. The experimental results of the electrical characteristics are in good agreement with the simulation.

Design of New Planar 3-way Power Divider (평면형 구조에 적합한 3-way 전력 분배기 설계)

  • Kim, Hyun-Tai;Kim, Kwi-Soo;Yoo, Dae-Woun;Lim, Jong-Sik;Ahn, Dal
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.1 s.116
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    • pp.1-6
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    • 2007
  • This paper presents an equal 3-way planar-type power divider. In conventional 3-way Wilkinson dividers, it has been difficult to realize the circuit because of the crossover of isolation resistors. In the proposed divider, the isolation resistors can be easily attached to the planar structure of the divider. In addition, no phase difference is observed at output ports without extra line compensation because of its symmetric structure. The fabricated 3-way divider has a greatly improved bandwidth by 160 % in $S_{11}$, 22.4 dB, min of isolation, and in phase characteristics between output ports at 2.4 GHz of center frequency from measurement.

Relay Protocol applied to Optimal Power Allocation (최적의 전력 분배 방안이 적용된 중계기 프로토콜)

  • Kim, Tae-Wook;Kong, Hyung-Yun
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.15 no.4
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    • pp.93-97
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    • 2015
  • In this Paper, we proposed optimization of system performance, optimal splitting factor applied to power splitting protocol with relay in the cooperative communication undergo co-channel interference. We can possible to optimize and maximize the channel capacity of the receiver through optimal factor of splitting protocol. So, we can solve inability in system, and to increase the efficiency of the network. Finally, performance of the proposed protocol is analyzed in terms of outage probability, capacity of system.

A Stripline 10-Way Power Divider for the Feed Network of an S-band Linear Array Antenna (S-대역 선형 배열 안테나의 급전 회로를 위한 스트립라인 10-출력 전력분배기)

  • Park, Il-Ho;Kim, Rak-Young;Park, Jung-Yong;Jeong, Myung-Deuk;Kim, Dong-Wook
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.3
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    • pp.280-288
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    • 2009
  • In this paper, a high-power and low-loss stripline 10-way power divider is designed and fabricated fur the feed network of an S-band linear array antenna with Chebyshev current distribution which has a narrow beam width and low side lobe level(SLL) of 35 dB or more. The unit cell of the power divider is based on a T-junction power divider and the whole divider is comprised of the cascaded unit cells. The multi-stage impedance transformer and modified ring hybrid are used in designing the power divider for performance improvement. And the reflection loss and insertion loss are improved by modifying a connector structure for a coaxial-to-stripline transition.

Design of Miniaturized Wilkinson Power Divider Using Substrate Integrated Artificial Dielectric (기판적층형 가유전체를 이용한 소형화된 윌킨슨 전력분배기 설계)

  • Koo, Ja-Kyung;Lim, Jong-Sik;Ahn, Dal
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.7
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    • pp.1542-1548
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    • 2009
  • This paper describes a size-reduced Wilkinson power divider using substrate integrated artificial dielectric(SIAD). SIAD transmission lines have increased effective refractive index, so the line width and length are reduced from those of standard transmission lines. Therefore the "size-reduction effect" is achieved if SIAD lines are applied to high frequency circuits. An efficient simulation method is proposed for SIAD lines which have an enormous number of via-holes. A 2GHz Wilkinson power divider is designed and measured using SIAD transmission line as an example of application. The size of the fabricated divider is reduced by 32% due to the increased effective refractive index of SIAD, while the performances are maintained similarly.

Design of miniaturized power divider multiple coupled line on RFIC/MMIC for application to vessel wireless communication components (선박 무선통신소자에의 응용을 위한 다중결합 선로를 이용한 RFIC/MMIC용 초소형 전력분배기의 설계)

  • Lee, Dong-Hwan;Yun, Young
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2005.06a
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    • pp.401-405
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    • 2005
  • This paper proposed a miniaturization passive element employing the multiple microstrip line. As a result of this method, we realized the transmission line miniaturized. The applying structure designed and evaluated a power divider on GaAS MMIC circuit. It draws a plan in a center Frequency as the observation could do good characteristic.

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Unequal Power Divider using Parallel Connection Transmission Line (병렬 연결된 전송선로를 이용한 비대칭 전력 분배기)

  • Kwon, Sang-Keun;Kim, Young;Yoon, Young-Chul
    • Journal of Advanced Navigation Technology
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    • v.17 no.2
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    • pp.202-207
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    • 2013
  • In this paper, a high dividing ratio unequal power divider using parallel connection transmission line is presented. Because a very low impedance transmission line can't implement a microstrip technology, this can fabricate a parallel connection transmission line with high impedance. When we design a high dividing ratio divider, we need the very low impedance line. The parallel connection transmission line could be implemented to obtain a low impedance line characteristic. To validity this approach, we are implemented a 10:1 unequal divider at center frequency 1 GHz. The performances of power divider agree with simulation results.

Torque Ripple Minimization of a Switched Reluctance Motor Using Fuzzy Controller (퍼지제어기를 이용한 스위치드 릴럭턴스 모터의 토크 맥동 저감 기법)

  • Ro, Hak-Sueng;Jeong, Hae-Gwang;Lee, Kyo-Beum
    • Proceedings of the KIPE Conference
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    • 2012.11a
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    • pp.223-224
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    • 2012
  • 본 논문은 퍼지 기반의 토크 분배 함수를 이용한 스위치드 릴럭턴스 모터의 토크 맥동 저감 기법을 제안한다. 일반적으로 스위치드 릴럭턴스 모터의 토크 맥동 저감 기법은 선행된 실험결과와 모터 파라미터의 변화에 대한 관측을 통해 오프라인으로 토크 분배 함수를 최적화한다. 이때, 모터의 높은 인덕턴스는 전류가 토크 분배 함수를 잘 추종하지 못하게 하여 의도치 않은 토크 맥동을 유발한다. 게다가 오프라인으로 토크 분배 함수를 계산하기 때문에 모델의 오차 및 변화에 따라 보상 성능이 저하 될 수 있다. 제안하는 제어기법은 퍼지 제어기를 이용하여 순시적으로 토크 분배 함수의 형상을 정정함으로써 토크 맥동을 저감한다. 시뮬레이션 결과를 통해 제안하는 제어기법의 우수성을 보인다.

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