• Journal of Advanced Navigation Technology
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• v.26 no.1
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• pp.15-21
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• 2022

In this paper, we propose a method to implement an unequal power divider with different complex termination impedances for different output power ratios. The proposed method was designed using a matching the terminated complex impedances of the output port using only the transmission line, and presented an isolation circuits to satisfy the isolation characteristic between the terminating complex impedance ports. To prove the feasibility of this method, an unequal power divider with different load complex impedances with a splitting ratio k² = 3 dB and 1.7 dB and an unequal power divider with different complex termination impedances of all ports with a splitting ratio k² = 3 dB was designed at a center frequency of 2 GHz, and it was confirmed that the measured results of the electrical characteristics agree well the simulation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.261-265
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• 1999

This paper has dealt with the design and analysis methods of the frequency characteristics for the power dividers which are extensively used in CATV and DBS systems. Therefore, the lumped-element circuits have been implemented based on the Wilkinson power divider and the characteristics of the circuits approximated to ideal transformer examined. Then the frequency characteristics are analysised by using even ㆍodd-mode method. Furthermore, in order to improve the characteristics, the optimum design method by adding compensating circuit has been proposed and it has been shown that the characteristics are improved remarkably.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.200-204
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• 2000

In this paper, we have dealt with the design and analysis methods of the frequency charateristics for the power dividers which are extensively used in CATV and DBS(Direct Broadcasting Satellite) systems. The lumped-element circuits have been implemented based on the Wilkinson power divider and the charateristics of the circuits approximated to ideal transformer examined. Then the frequency characteristics are analysised by using even - odd-mode method. Furthermore, in order to improve the charateristics, the optimum design method by adding compensating circuit has been Proposed and it has been shown that the charateristics are improved remarkably.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1991.10a
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• pp.103-106
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• 1991

Spectrum Analyzer is a useful measure instrument to display the distributed power of electrical signal as a function of frequency. It adopts the superheterodyne receiver, which mixes RF with L0 to output IF. So in this paper, two GHz-order microstrip low-pass filters, 2-section wilkinson power divider, and singly balanced diode mixer have been designed and implemented necessary to make the frequency converter applied to RF spectrum analyzer.

• Journal of information and communication convergence engineering
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• v.11 no.3
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• pp.147-152
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• 2013

A novel balun being the structure of a Wilkinson power divider is suggested and fabricated. One of the power dividing paths in the suggested balun uses a conventional ${\lambda}/4$ transmission line for $-90^{\circ}$ phase shifting, and the other path uses a composite right/left-handed -${\lambda}/4$ transmission line for $+90^{\circ}$ phase shifting with four series capacitors and three parallel inductors. In addition, the suggested balun uses two $50-{\Omega}$ resistors and a conventional $50-{\Omega}$ transmission line of ${\lambda}/2$ electrical length between the two output ports, achieving good isolation and reflection values of two balanced ports. The suggested balun is simulated by the advanced design system simulation program and fabricated on TLX-9 20-mil substrate. The fabricated balun has a very good values of $S_{11}$ = -27.46 dB, $S_{21}$ = -3.40 dB, and $S_{31}$ = -3.28 dB, a phase difference of $-179.5^{\circ}$, a magnitude difference of 0.12 dB, and a delay difference of 0.1 ns, with $S_{22}$ = -36.28 dB, $S_{33}$ = -27.19 dB, and $S_{32}$ = -25.2 dB at 1 GHz, respectively.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.543-544
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• 2008

Nowadays, the research on the system integration using various technologies, like MCM-C, MCM-L and MCM-D. Especially, MCM-D technology is suitable for mmwave application due to its high resolution of patterning and thermal property similar to that of semiconductor devices. In this work, integrated passive devices like inductor, capacitor and resistor are evaluated on the GaAs substrate and their characteristics are examined. And finally, the Wilkinson power divider using lumped IPD are evaluated on GaAs substrate and it shows low insertion loss below 0.5 dB and the isolation over 15 dB.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.3 no.1
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• pp.63-69
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• 2010

In this paper, a new design method of asymmetrical configuration of main amplifier and peaking amplifier using changed bias point is proposed for excellent linearity, instead of the conventional Doherty structure. We have utilized the uneven wilkinson power divider for the unequal power drive at the input network of amplifiers. And we proposed a compensating method of the decreasing efficiency due to improving linearity using 3-stage Doherty structures. From the simulation results of asymmetrical Dohertry power amplifier and asymmetrical 3-stage Doherty power amplifier with uneven power drive are implemented. From the implementation and measurement results of the each amplifier, IMD characteristics have -55 dBc as the good efficiency of 13% compensates the decreased entire efficiency due to the improving linearity characteristics.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.3
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• pp.194-201
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• 2014

This paper is able to be solved by improving degradation in multi-path environment by adjust beam pattern angle through modifying pulse phase of each antennas by using TRM (Transmitter Receiver Module). Beam Scanning Array Antenna, which is transmitter/receiver that improves degradation in multi-path environment without any signal distortion, is designed and manufactured. Beam Scanning Array Antenna should be able to send/receive signal at the antenna's longitudinal part without distortion and should not influences other systems. Also, it should include target detecting ability by beam steering.Dispersion characteristic of Beam Scanning Antenna, which is designed, is analysed by using fidelity, and steering and radar resolution performance is verified by using $1cm{\times}1cm$ sized target. To manufacture Beam Scanning Array Antenna, control board and GUI, which is able to control Vivaldi Antenna for IR-UWB, Tri-Band Wilkinson power divider, and TRM (Transmitter Receiver Module), is designed. Throughout this research, developed Beam Scanning UWB Array Antenna system is adoptable for radar application field. and time domain analysis techniques by using network analyser made the antenna characteristics analysis for setting up antenna more accurate. In addition, it makes beam width checking without difficulties.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.8 no.6
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• pp.363-644
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• 1997

This paper presents the design and fabrication of a shaped-beam array antenna which will be used for a PCS basestation using structure that is coupled to a microstrip line by an aperture on the interening ground plane. The shaped-beam pattern is obtained by an antenna synthesis method. An array antenna considering the mutual coupling between array elements patches) and a feeding network are designed by CAD tools. The feeding network is designed by using the Wilkinson power divider to obtain the optimized shaped-beam. The designed results are compared with the measured data.

• Journal of the Microelectronics and Packaging Society
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• v.2 no.2
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• pp.19-30
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• 1995

일반적으로 마이크로 웨이브 영역에 사용되는 마이크로스트립 전송로는 후막 전도 선을 이용하여 RF 모듈을 구현할수 있으나 선폭의 고해상도가 전체 특성에 큰 영향을 미치 므로 고정도의 박막을 이용한 RF 모듈이 많이 개발되고 있다. 따라서 본 논고에서는 박막 제조기술을 이용하여 마이크로 웨이브 하이브리드의 한 종류인 WILKINSON 전력 분배기 를 개발하였고 공정 변수를 최적화함으로써 고특성 고신회성의 전력 분배기를 구현할 수 있 었다. 먼저 전도선의 두께의 영향을 고찰하였으며 제조 공정에 있어 GROUND 방법 /HOUSING 형상을 개선함으로써 용이하게 전력 분배기를 제조하였다. 마지막으로 MIL 규 격에 따른 전력분배기의 신뢰성 시험 항목을 제시하였고 이에 따라 정격 전력을 계산, 측정 하였다.