• 한국전자통신학회논문지
• /
• 제9권12호
• /
• pp.1331-1336
• /
• 2014

본 논문은 X대역 고출력증폭기의 전력 결합 손실을 최소화 하기위하여 Al2O3 박막 기판으로 제작한 divider/Combiner 회로를 X-대역의 PAM(Power Amplifier Module)에 적용하여 25W 급 전력증폭기 모듈을 구현하였다. 제작은 MMIC 칩과 수정된 형태의 10way traveling wave divider/Combiner회로를 사용하였으며 제작된 Traveling wave구조의 전력증폭기는 출력전력 45.2dBm, 16dB 이득, PAE 26 % 특성을 얻었으며 IMD3 는 17dBc@44dBm의 특성을 보였다. 본 연구의 divider/Combiner 회로는 다단계 구조의수동 결합기 및 분배기에 사용될 수있으며 협소한 크기의 전력증폭기에 사용될 수 있다.

• Journal of Advanced Marine Engineering and Technology
• /
• 제33권1호
• /
• pp.144-152
• /
• 2009

This paper propose highly miniaturized active $90^{\circ}C$ phase difference power divider and combiner for application to wireless communication system. The conventional passive $90^{\circ}C$ power divider and combiner cannot be integrated on MMIC because of their very large circuit size. Therefore, the highly miniaturized active $90^{\circ}C$ phase difference power divider and combiner are required for a development of highly integrated MMIC. In this paper, the highly miniaturized active $90^{\circ}C$ phase difference power divider and combiner employing InGaAs/GaAs HBT were designed, fabricated on GaAs substrate. According to the results, the circuit size of fabricated active $90^{\circ}C$ phase difference power divider and combiner were $1.67{\times}0.87$ mm and $2.42{\times}1.05$ mm, respectively, which were 31.6% and 2.2% of the size of conventional passive branch-line coupler. The output gain division characteristic of proposed divider circuit showed 8.4 dB and 7.9 dB respectively, and output phase difference characteristic showed $-89.3^{\circ}C$. The output gain coupling characteristic of proposed combiner circuit showed 9.4 dB and 10.5 dB respectively, and output phase difference characteristic showed $-92.6^{\circ}C$. The highly miniaturized active $90^{\circ}C$ phase difference power divider and combiner exhibited good RF performances compared with the conventional passive branch-line coupler.

• 전기학회논문지
• /
• 제60권9호
• /
• pp.1727-1732
• /
• 2011

In order to realize a high performance(low loss, high isolation) microwave power divider/combiner, we have designed the power combiner/divider precisely in accordance with the different hight of central part. In the case of the high central part of the hight of $h_r$=10.2, a compensating part of the conical line is inserted in the conical conversion transmission line, and in the case of low central part of the hight of $h_r$=5.0, the conical conversion transmission line is remodeled into the 2-stage bend structure. In both case, the reflection characteristics are improved to 30dB over the operating frequency range of 5GHz bandwidth. A resistance is inserted between the peripheral ports so as to try to improve the isolation characteristics of the device. For the 16-divider/combiner, the isolation characteristics are improved to 10dB over the operating frequency range of 5GHz bandwidth.

• 전자공학회논문지D
• /
• 제34D권8호
• /
• pp.1-7
• /
• 1997

In ahigh power amplifier design, power combiner/divider is used to connect low power amplifiers in parallel. The raidal structure of the powe combiner/divider has not only a good characteristics of port-to-port isolation but also an advantage of giving a redundancy to the structure itself by using RF switches. The parastics of a power resistor, that would be a problem in design process, are removed by both slot lines and cavity resonators, and the comon node in the circuit is rdesigned as a planar topology, and thus a new type of 4-way radial power combiner/divider is accomplished at 1840 ~ 1870 MH PCS frequency band. The insertion loss, reflection, and isolation characteristics of 40way radial power combiner/divider which can be adaptable to PCS system in this thesis are -0.3dB, -24dB,a dn -27dB respectively.

• 한국통신학회논문지
• /
• 제14권6호
• /
• pp.579-589
• /
• 1989

K-밴드 또는 밀리터리파 대역에서 모노리딕 및 하이브리드 기판에 Surface Mounting에 의해 제작될 수 있는 여러가지 planar power divider/combiner를 CAD에 의해 최적조건으로 설계하고 그 결과를 비교 검토하였다. CAD를 위한 소프트웨어는 Supercompact를 이용하였으며 기존의 Wilkinson divider를 각 branch사이의 고주파 결합을 감소 시킬 수 있도록 수정하여 해석하였고, 또한 $2^n$-way power dividet/combiner에 있어 그 출력 임피던스가 잘 정합되지 못함에 따른 입력 반사계수의 sensitivity를 감소시키는 방법에 대하여 연구하였다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 하계학술대회 논문집 C
• /
• pp.2046-2048
• /
• 2004

In this paper, we have proposed a novel omnidirectional power divider/combiner configuration. By using the even- and odd- mode analysis. we analyse the proposed power divider/combiner circuit. In order to show the validity of the presented power divider/combiner circuit. We have designed and implemented the proposed circuit of the center frequency of 2.3GHz.

• 전기학회논문지
• /
• 제60권7호
• /
• pp.1385-1390
• /
• 2011

A coaxial-conical-radial transmission line conversion circuits have been investigated to realize a low loss high performance microwave power divider/combiner. In order to optimize the characteristics of the device, the power divider/combiner was designed separately with two parts-the inner part and the outer part. Utilizing the rectangular approximation of the outer part, we can design the low loss device which is not affected by the partition number N of the outer part. The small return loss which is lower than 20dB was obtained on the frequency range of 5.15GHz(7.45~12.60GHz). A conical connector was employed for smooth connection between the central coaxial line and the outer radial line. Making use of the $47^{\circ}$ and $90^{\circ}$ 2-stage conical connector, the return loss lower than 30dB was obtained on the operating frequency range of 5GHz. The total return loss of the designed divider/combiner was lower than 20dB on the frequency range of 5GHz for the partition number N=11, N=12 and N=16.

• 반도체디스플레이기술학회지
• /
• 제15권4호
• /
• pp.22-26
• /
• 2016

In this paper, we measured the efficiency of the receiver for 5.8GHz Microwave Smartphone Charging. We have designed and fabricated 1W and 2W power amplifier, respectively. A 1W power amplifier used a TC3531 power device of TRANSCOM Inc. In addition, a 2W power amplifier using the two TC3531 devices was constructed with divider and combiner. We used the Wilkinson divider theory for divider and combiner. The voltage was measured using the 1W and 2W power amplifier and integrated receivers to the distance of 50cm.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제48권6호
• /
• pp.489-493
• /
• 1999

In this paper, an analysis of microstrip-slotline transition is performed using a 3D vector Finite Element Method(FEM). Artificial anistropic absorber technique is employed to implement an matching boundary condition in FEM. On the base of the analysis, power divider/combiner is designed. The structure of the power combiner already developed are Branch-line coupler, Rat-race coupler, Wilkinson coupler, Lange coupler, etc. Which are all planar, If the frequency goes up, the coupling efficiency of these planar couplers is decreased on account of skin loss. Especially, in millimeter-wave band, the efficiency of more than two ways combiner is radically reduced, so that application in power amplifier circuit is almost impossible, Microstrip-slotline transition structure is a power combining technique integrated into wave-guide, so that the loss is small and the efficiency is high. Theoretically, we can mount several transistors into the power-combiner. This makes it possible to develop a high power amplifier. The numerically calculated performances of the device that is, we believe, the best are compared to the experimental results in Ka-Band(26.5GHz-40GHz).

• 한국항행학회논문지
• /
• 제24권4호
• /
• pp.299-304
• /
• 2020

본 논문은 평면형 구조를 갖는 원형 부채꼴 모양의 전력 분배기-결합기 설계에 대한 것이다. 이 구조는 직렬형으로 구성할 수 있으며 원형 부채꼴 모양으로 인하여 간단한 회로 구성과 출력의 크기와 위상 발란스 특성을 개선할 수 있으며, 이것은 단순한 입력 정합회로를 갖고 있으며 출력 포트 사이에 RC 병렬 회로를 삽입하여 출력의 반사계수와 고립도를 개선하였다. 설계된 분배기와 결합기는 구조적으로 부채꼴 모양의 대칭적으로 설계되었기 때문에 출력 포트를 2개 또는 4개로 구성하였을 때 출력 사이의 크기 발란스 ± 0.1 dB 와 위상 발란스 ± 1o를 갖는 우수한 특성을 갖고 있다. 이러한 전기적 특성을 확인하기 위해서 동작주파수 2 GHz에서 제작된 평면형 전력 분배기-결합기는 시뮬레이션과 특성이 잘 일치함을 확인하였다.