• Title, Summary, Keyword: Active Antenna Module

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A Ka-band 8-channel TX Active Module Design for Active Phased Array Antenna (능동위상배열 안테나를 위한 Ka-대역 8채널 송신능동모듈 설계)

  • Jung, Young-Bae
    • Journal of IKEEE
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    • v.17 no.2
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    • pp.135-139
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    • 2013
  • This paper presents the 8-channel active module operated in Ka-band. The module is designed for the mobile satellite communication antenna systems, and the module structure has the merit to minimize the size and weight of the antenna systems by 30% compared with the conventional systems using the active module composed of single channel. This module was designed to be optimally operated by prohibiting the electrical interference among the individual channels. From the test results of the fabricated 8-channel active module, it can be confirmed that the maximum channel gain error is ${\pm}1.3dB$, the minimum channel output power is 21.5dBm, and the maximum gain variation by phase control is ${\pm}1.0dB$.

A Compact Active Channel Module Design for Active Phased Array Antenna System

  • Jung, Young-Bae
    • Journal of IKEEE
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    • v.17 no.4
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    • pp.393-397
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    • 2013
  • This paper introduces the T/RX combined compact active channel module which is a key unit of the active phased array antenna(APAA) system. This module is mainly compoased of two parts for TX and RX fabricated on both sides of the active module for size reduction. The TX-part is primarily composed of a 3-stage amplifier, a microstrip phase shifter, a thermal compensation and a power detection circuit. The RX-part is composed of LNAs a microstrip phase shifter and BPFs for TX power rejection. Using the proposed design structure we can realized a compact active channel module having high performance.

Active Antenna Module for 60 GHz Frequency Band (60 GHz 대역 능동 안테나 모듈 설계)

  • Ahn, Se-In;Yun, Sang-Won
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.30 no.6
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    • pp.518-521
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    • 2019
  • In this paper, an active antenna module operating in the 60 GHz band is designed and fabricated by combining a commercial transmitter chip and patch array antenna. The designed module is composed of an antenna PCB and a PCB with a transmitter chip. The frequency-control and bias-control signals are applied to the transmitter chip, using an Arduino kit. A baseband I/Q signal is also applied to the chip. A ring hybrid balun converts the output of the transmitter module to a single output, which is the output of the transmitter chip that outputs a differential output. The output is delivered to the $2{\times}4$ microstrip patch array antenna PCB as a micro-computer connector. The radiation pattern of the millimeter-wave signal of the final output is compared with the simulation results. The measured radiation patterns of the fabricated active antenna module confirm that the positions of the 3 dB beam width and null point agree well with the simulation results.

Study on the Beam Pattern Compensation with Planar Active Phased Array Antenna (평면형 능동위상 배열안테나 빔 패턴 보상에 관한 연구)

  • Chon, Sang-Mi;Na, Hyung-Ki;Ahn, Chang-Soo;Kim, Seon-Joo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.2
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    • pp.217-222
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    • 2014
  • This paper discusses about the beam pattern distortion caused by the failures of some antenna modules in the active array antenna and analyses the possibility of improvement through applying the beam pattern compensation method previously studied. The beam pattern distortion which is mostly represented as an increase of the sidelobe level, can be suppressed through re-synthesizing each module's magnitude and phase. This method was applied to the prototype of active array antenna system, and the results of antenna pattern distortion and compensation were analyzed and measured in the Near Field Chamber. Array failures are generally divided into random TR module failures and TRU(TR Unit: combination of TR modules, Beam Computation module, Power supply module) failures. The results of beam pattern compensation were analyzed in each failure and compared to the results of the simulation. The beam pattern compensation results applied to the real active antenna array system showed the similar to the simulation results. Consequently, it was verified the beam pattern could be compensated with the magnitude and phase adjustment of other normal antenna modules.

The Design of Beam Forming Module for Active Phased Array Antenna System (능동위상배열안테나용 수신 빔 성형모듈 설계)

  • 정영배;엄순영;전순익;채종석
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.118-122
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    • 2002
  • This paper is concerned with the design of the beam forming module that is a key unit of the active phased array antenna(APAA) system for mobile satellite communications. This module includes two blocks for main signal and tracking signal. Main signal block has the role of transmitting input signal from phased away antenna to tracking signal block. And, tracking signal block executes main roles, beam forming of tracking signal and electronic beam control. The several electrical performances of this module, phase characteristics and linear gain, etc., agreed with specifications needed for APAA, and for more clear verification of the performances, the satellite communication test of the APAA including the modules was accomplished in the outdoors.

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Array Error Analysis and Correction of Active Array Antenna for AESA Radar (AESA 레이더 능동위상배열 안테나의 배열오차 분석 및 보정)

  • Lee, YuRi;Kim, JongPil;Kang, Yeonduk;Kim, SunJoo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.26 no.4
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    • pp.414-423
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    • 2015
  • Array error analysis and correction of active array antenna are described in this paper. Array elements composed of radiator and TR(Transmit & Recive) module have error(magnitude and phase difference among array elements) which affects SLL(Side Lobe Level). Error affectedness level depends on ideal SLL according to antenna aperture weighting, number of array elements and antenna effective aperture. To satisfy required SLL, correction of array elements is necessary; adopted differently per errors, and weighted differently per shapes of antenna and required SLL. Errors of every individual element had been defined, performance of the antenna with or without error correction had been estimated and proved through near field test.

The Design of Beam Forming Module for Active Phased Array Antenna System (능동위상배열안테나용 수신 빔 성형모듈 설계)

  • 정영배;엄순영;전순익;채종석
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.1
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    • pp.62-67
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    • 2003
  • This paper is concerned with the design of the beam forming module that is a key unit of the active phased array antenna(APAA) system for mobile satellite communications. This module includes two blocks for main signal and tracking signal. Main signal block has the role of transmitting input signal from phased array antenna to tracking signal block. And, tracking signal block executes main roles, beam forming of tracking signal and electronic beam control. The several electrical performances of this module, phase characteristics and linear gain, etc., agreed with specifications needed fur APAA, and for more clear verification of the performances, the satellite communication test of the APAA including the modules was accomplished in the outdoors.

PIMD Performance Test of Active Baseband Antenna (능동형 기지국안테나의 PIMD 특성분석)

  • Kim, Jae-Hak;Jung, Young-Bae
    • Journal of IKEEE
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    • v.17 no.2
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    • pp.163-167
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    • 2013
  • As the mobile services have been increased, the interference of the neighboring base stations is increased and the PIMD(Passive Inter-Modulation Distortion) has been a main issue for the design of base station antenna systems. In this paper, it is proposed the PIMD test method for the active basestation antenna whose radiators are directly connected with main active parts including amplifiers, and we presents its test results using a developed active basestation antenna. From the results, the active basestation antenna has the better PIMD performance than conventional passive structure by 8.4dB. The proposed PIMD test method can be used to get the accurate PIMD test result because the test environment is very similar with real basestation.

A Study on On-board ATO/TWC Antenna Design and Manufacture (차상 ATO/TWC 안테나 설계 및 제작에 관한 연구)

  • Yoo Sung-Ho;Park chong chon;Kang Lee-Taeg;Cho Young-Wan;Cha Ji-Ju
    • Proceedings of the KSR Conference
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    • pp.903-908
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    • 2005
  • Existing ATC/ATO/TWC system has a ATC(Automatic Train Control) antenna for receiving the speed code, a ATO(Automatic Train Operation) antenna for obtaining the exact distance to go to platform and TWC(Train and Wayside Communication) antenna for communication between on-board and wayside system. This paper proposes the ATO/TWC antenna with tele-powering module, telegram transmitter/receiver module. This antenna communicates with a passive type tag(wayside Precision Stop Marker) for the information of distance from the stop position and a active type tag for the door command and status in the platform.

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Design of the Train Identification Module Using a RFID System in 27.095MHz Bandwidth (27.095MHz 대역의 무선인식 시스템을 이용한 열차인식 모듈의 설계)

  • Yoon Shang-Moon;Baek Sun-Ki;Park Myeon-Gyu;Lee Kye-Seo
    • Proceedings of the KSR Conference
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    • pp.487-492
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    • 2003
  • This paper designs a Korea train identification module using a RFID system. Frequency bandwidth transmits and receives messages using the 27.095Mhz and 4.234Mhz in the ISM bandwidth. The mode of the modulation uses a transmission ASK and a receiving FSK. And it uses a reader and transponder using an active transponder. We use the loop antenna which the antenna has the directional.

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