• Title, Summary, Keyword: Tapered microstrip

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Analysis of the Wave Propagation Characteristic for Pulse Signal on Tapered Microstrip Line in Time Domain (테이퍼형 마이크로스트립 전송선로에서 펄스 신호의 시간 영역 전송특성 해석)

  • Kim Girae;Choi Young-Kvu
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.1
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    • pp.40-44
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    • 2006
  • In this paper, the distortion characteristics of an electrical pulse which has a rise/fall time due to the dispersion and the reflection, on nonuniform tapered microstrip lines has investigated in time domain. The transmission characteristics on uniform microstrip lines in time domain had represented already, but the results for the nonuniform tapered microstrip lines not represented yet. We investigated the transmission characteristics for pulse signal on the nonuniform tapered microstrip lines, and the result applied to design of wide band impedance matching circuit in design of MMIC. The voltage and current transfer functions are shown for the tapered line. The dispersion and distortion obtained by using these transfer functions are represented for the nonideal square pulse.

A Pair Dipole Antenna with Double Tapered Microstrip Balun for Wireless Communications

  • Lee, Hyeonjin
    • Journal of Electrical Engineering and Technology
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    • v.10 no.3
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    • pp.1081-1085
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    • 2015
  • In this paper a printed pair dipole antenna with double tapered microstrip balun for wireless communications is proposed. The proposed antenna consists of a pair arm of different sizes that is branched microstrip line and microstrip line with the ground plane on opposite side of the dielectric substrate plane. The proposed antenna is matched between the ground plane to the microstrip line by double tapered microstrip balun. This antenna obtains multi-band radiation frequency band. The impedance bandwidths for a reflection coefficient of VSWR ≤ 2 are about 1.01 GHz (2.35~3.336 GHz), 1.56 GHz (4.7~6.26 GHz) and 1.15GHz (6.85~8.0[GHz]). Additionally, the measurement peak gain is about 3.6 dBi. The proposed antenna is able to support wireless communication applications.

Improvement of Communication Reliability of Small UAV by a Tapered Stacked Antenna

  • Kim, Duck-Hwan;Lee, Kyu-Hwan;Kim, Young-Sik
    • ETRI Journal
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    • v.28 no.6
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    • pp.796-798
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    • 2006
  • This letter proposes a tapered stacked microstrip antenna for application in small unmanned aerial vehicles (UAVs), which has advantages in mountainous terrains. With its tapered structure and increased bandwidth designed to operate at the resonance frequency of 2.4 GHz, the proposed antenna improves directivity, accuracy, and precision of small UAVs. The test flight results show the proposed tapered antenna has a three times higher impedance capability of 350 MHz based on VSWR<2. The transmission pattern is also more reliable than that of previous antenna designs.

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CPW-fed to CPS Dipole Antenna of Microstrip Tapered Balun with Triangular Loop Director

  • Lee, Hyeonjin
    • Journal of Electrical Engineering and Technology
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    • v.9 no.4
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    • pp.1365-1368
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    • 2014
  • A CPW-fed to CPS dipole antenna of triangular loop director by microstrip tapered balun is proposed for dual and wide band operations, in this paper. The proposed antenna is consisted of a CPW-fed to CPS transform, microstrip tapered balun element, CPS dipole driver and triangular loop director. A dual and wide bandwidth of the proposed dipole antenna is realized by introducing the triangular loop director and taper matching element. The operated frequency bandwidth is 1GHz (2.14~3.14 GHz) and 1.9 GHz (4.6~6.5 GHz) to return loss criterion of less than 10 dB. The measured return loss of the proposed antenna showed good results of the dual and wide band operating frequency and the radiation pattern. The proposed antenna is able to support WLAN wireless communications applications.

Transmission Characteristics Analysis of Digital Pulse Signal on Tapered Microstrip Line in Time Domain (테이퍼형 마이크로 스트립 선로에서 디지털 펄스 신호의 시간 영역 전송 특성 해석)

  • Kim, Gi-Rae
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.36D no.8
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    • pp.1-6
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    • 1999
  • The only transmission characteristics in frequency domain is considered when using the tapered transmission line for wide-band impedance matching in MCM and MIC designs. In this paper, the distortion of an electrical pulse with rise/fall time resulting from dispersion and reflection as it propagates along a tapered microstrip line is investigated, and the delay time and distortion rate with respect to input and load impedances are analyzed on triangular and exponential tapered lines. A dispersion model of the phase constant proposed by Kirschning-Jansen is used to meet the frequency, accuracy and microstrip parametric requirements. The triangular tapered line shows both shorter delay time and higher distortion rate than those of the exponential tapered line. Furthermore, the amplitude of signal reflected from load point is calculated in time domain.

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Analysis of the Pulse Distortion on Tapered Microstrip Lines (테이퍼형 마이크로스트립 선로에서 펄스의 왜곡 특성 분석)

  • Kim, Gi-Rae
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.37 no.8
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    • pp.45-51
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    • 2000
  • The distortion of an electrical pulse, which has a rise/fall time due to the dispersion and the reflection, on tapered microstrip lines has investigated In time domain. The voltage and current transfer functions are shown for the tapered line. The dispersion distortion obtained by using these trans(or functions are represented for the nonideal square pulse along the triangular, Tchebycheff and exponential tapered lines, and analyzed the influence of the reflection and the frequency dispersion on the distorted voltage wave in the tapered lines. The observed overshoot in front of the distorted wane is caused due to the frequency dispersion and the sustained tail of that comes from the reflection in the tapered line.

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Design of A Microstrip Linear Tapered Slot Antenna (마이크로스트립 선형 테이퍼형 슬롯 안테나 설계)

  • Jang, Jae-Sam;Kim, Cheol-Bok;Lee, Ho-Sang;Jung, Young-Ho;Jo, Dong-Ki;Lee, Mun-Soo
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.45 no.5
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    • pp.40-45
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    • 2008
  • In this paper, a microstrip linear tapered slot antenna is designed. A tapered slot antenna(TSA) has many advantages such as low profile, low weight, easy fabrication, and compatibility with monolithic microwave integrated circuits(MMIC). In addition, it has demonstrated multi octave bandwidth, moderately high gain, and symmetrical E- and H-plane beam patterns. A feed network is implemented with transition between a microstrip and a slot line for the microstrip linear tapered slot antenna. The transition is consist of two sides. One side has a microstrip line, the other side has a slot line. The dimensions of the microstrip and slot line are ${\lambda}_m/4$ and ${\lambda}_s/4$ at the center of the cross section of the microstrip and slot line. In order to get broad bandwidth antenna characteristics, the tapered length is chosen as $4{\lambda}_o$ and termination width is chosen as $1.75{\lambda}_o$. Experimental results show that the microstrip tapered slot antenna has symmetrical E- and H-plane beam patterns with around 5GHz of bandwidth at center frequency of 5.0GHz.

Characteristics and Applications of the Tapered Feedline with Strong Coupling (강한 결합성을 갖는 테이퍼 라인을 이용한 공진기 급전선의 특성 및 응용)

  • 한상민;최준호;김영식
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.8
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    • pp.878-883
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    • 2003
  • New feeding structures using linearly and exponentially tapered lines to planar microstrip resonators are proposed. These can overcome the design problems from coupling losses and impedance mismatching by increasing the coupling efficiency. The variation of its feeding angle is evaluated for the insertion loss and bandwidth and the feedline length is optimized at ${\lambda}_g$/2. The ring resonators and patches fed by the tapered line have been designed and implemented. The experimental results show that the insertion loss is enhanced by about 7 dB. Both rings and antennas are better matched, without disturbing the single-mode resonance or distorting their radiation pattern

An effects of the Pulse Distortion due to Dispersion and Reflection on Tapered Microstrip Line (데이퍼형 마이크로 스트립 선로에서 분산과 반사가 펄스의 왜곡에 미치는 영향)

  • 김기래
    • Proceedings of the IEEK Conference
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    • pp.271-274
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    • 2000
  • In this paper, the distortion of an electrical pulse with rise/fall time resulting from dispersion and reflection as it propagates along a tapered microstrip line is investigated, and the delay time and distortion rate with respect to input and load impedances are analyzed on triangular and exponential tapered lines and analyzed the influence of the reflection and frequency dispersion on the distorted voltage wave in the tapered lines. The observed overshoot in front of the distorted wave is caused due to the frequency dispersion and the sustained tail of that comes from the reflection in the tapered line.

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Dual Band Dipole Antenna with Tapered Microstrip Balun for WLAN Access Point (무선랜 AP(Access Point)용 테이퍼형 마이크로스립 발룬 구조 이중대역 다이폴 안테나)

  • Kim, Joung-Myoun;Kim, Jeong-Li;Yun, Je-Hoon;Kim, Nam
    • Proceedings of the IEEK Conference
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    • pp.219-220
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    • 2006
  • In this paper, we designed and implemented the Dual Band Dipole Antenna with Tapered Microstrip Balun for WLAN Access Point. Two dipole antennas with different resonant frequency and the antenna structure combined additional line were implemented for dual band performance. In order to feed the balun current, the tapered microstrip balun was used. Produced the Dual Band Antenna shows a special quality. The quality is that all VSWR is less than 1.5 in the 2.4GHz and 5GHz frequency bands in 802.11 standards, and it profits not less than 1.7dBi having typical Dipole Antenna pattern the very "a form of 8"pattern and Omni-directional pattern.

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