• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.3
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• pp.427-437
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• 2008

In order to increase the coupling efficiency of the power and phase of the active phase array antenna, we have fabricated the active phased-array antenna which is coupled by the transmission line, and investigated the relationship between the length of the coupling transmission line and coupling power and phase. The following three types of driving method - (1) giving the frequency difference between the two active antenna, (2) applying the input signal to the one side of the two antennas, and changing the eigen frequency of the other side antenna, (3) appling the different phase inputs to the active antennas was investigated. The experimental results showed that the interval of the antenna elements has not affected the power and the phase of the antenna.

• 한국정보통신설비학회:학술대회논문집
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• 2006.08a
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• pp.193-196
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• 2006

In this paper, two $4{\times}4$ rectangular patch array antennas operated at 20 GHz are implemented for the satellite communication. Two $2{\times}2$ sub-arrays are designed and used for the design of $4{\times}4$ patch array. The sixteen patch antennas and microstrip feeding line are printed on the single-layered substrate. The spacing between the array elements is chosen to be $0.736{\lambda}$. The HPBW(Half Power Beam Width) of the $4{\times}4$ microstrip patch array is 17.01 degrees in the E-plane and 17.71 degrees in the H-plane with a gain of 11.6dB in the experimental results. The HPBW of the recessed $4{\times}4$ microstrip patch array is 18.66 degrees in E-plane and 17.12 degrees in the H-plane with a gain of 12.55dB in the experimental results.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.132-137
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• 2003

This performance is motivated to develop a tracking antenna system for receive the satellite broadcasting signal in the coast sailing ship. Therefore, this system is made to small size, light weight and simple operation which is must to low cost system for popularization of small size ship and adaptive possibilities with useful on a ship in the coast using 1 axis Az-mount. The antenna mount structure is a compact size and easy operation to the Az-axis type which is operated by step motor. The antenna unit is a domestic made plate type of patch array and ship's moving detection is using the gyro sensor for ship's moving control. We are designed to algorithm, which walking is abreast for step track and ship's moving compensation. Ship's moving compensation is adapted to the closed loop control method by detection from gyro sensor. This system is consisted of micro processor, ADC, comparative amplifier, step motor driver, mount mechanism and algorithm. We have analysised the tracking performance of prototype on sailing ship board.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.6
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• pp.1130-1137
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• 2003

This performance is motivated to develop a tracking antenna system for receive the satellite broadcasting signal in the coast sailing ship. Therefore, this system is made to small size, light weight and simple operation which is must to low cost system for popularization of small size ship and adaptive possibilities with useful on a ship in the coast using 1 axis Az-mount. The antenna mount structure is a compact size and easy operation to the Az-axis type which is operated by step motor. The antenna unit is a domestic made plate type of patch array and ship's moving detection is using the gyro sensor for ship's moving control. We are designed to algorithm, which walking is abreast for step track and ship's moving compensation. Ship's moving compensation is adapted to the closed loop control method by detection from gyro sensor. This system is consisted of micro processor, ADC, comparative amplifier, step motor driver, mount mechanism and algorithm. We have analysised the tracking performance of prototype on sailing ship board.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.5
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• pp.63-68
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• 2018

In this paper, We intended to design various things for the realization of SoS(System on Substrate) with SIW in 24GHz ISM 밴드(24-24.25GHz). As part of them, We integrated SIW, transition and MPAA as SoS on the same substrate and investigated its characteristics. We used Rogers Ro4350 with relative permittivity of 3.48 and thickness of 20mil. As results of optimal design, insertion loss of the SIW with 11.55mm length showed 0.32dB and insertion loss of 0.19dB occurred in transition to $50{\Omega}$ microstrip. Characteristics of the MPAA integrated on the same substrate as SoS are very similar to those of stand-alone MPAA. But the integrated MPAA decreased by 0.58dB in gain, which is the sum of SIW insertion loss and transition insertion loss, and by 0.7dB in SLL compared that of stand-alone MPAA. However, the bandwidth was increased by 19.4% as it changed from 670MHz to 800Mhz.