• Title, Summary, Keyword: A pair dipole antenna

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Design of a Broadband Series-Fed Bow-tie Dipole Pair Antenna for Mobile Base Station (이동통신 기지국용 광대역 직렬 급전 보우타이 다이폴 쌍 안테나 설계)

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.3
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    • pp.1445-1450
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    • 2013
  • In this paper, a broadband series-fed bow-tie dipole pair (SBDP) antenna operating in the band of 1.7-2.7 GHz for mobile communication base station applications is proposed. The proposed antenna uses bow-tie-shaped dipole elements instead of straight strip dipole ones used in a conventional series-fed dipole pair (SDP) antenna. The simulation results show that the lowest operating frequency is shifted toward lower frequency as the flare angle increases, and so the lengths of the bow-tie dipole elements can be reduced in proportion to the frequency shift toward lower frequency. An SBDP antenna with a flare angle of 10 degrees is fabricated on an FR4 substrate (dielectric constant = 4.4 and thickness = 1.6 mm) and total width of the fabricated antenna is reduced by 10% compared to that of the conventional SDP antenna. The measured impedance bandwidth for voltage standing wave ratio (VSWR) < 2 is 48.8% (1.69-2.78 GHz), gain is 5.8-6.3 dBi, and the front-to-back ratio (FBR) is 14-17 dB.

A Study on Characteristics of Series-Fed Dipole Pair Antenna with End-Aligned Strip Pair Director (종단 정렬된 스트립 쌍 도파기를 가지는 직렬 급전 다이폴 쌍 안테나의 특성 연구)

  • Yeo, Junho;Lee, Jong-Ig;Park, Jin-Taek
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.4
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    • pp.805-810
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    • 2014
  • In this paper, the characteristics of a series-fed dipole pair antenna with an end-aligned strip pair director are studied. In the proposed SDP antenna, two strip dipole antennas with different lengths and a ground reflector are connected trough a coplanar stripline. The strip pair director placed above the second dipole element are two rectangular-shaped strips and is aligned at the ends of the two arms of the second dipole. The variations on the antenna performance for different lengths and widths of the director are analyzed, and optimal design parameters for the enhancement of the bandwidth are obtained. The optimized SDP antenna is fabricated on an FR4 substrate, and the experimental results show that the antenna has a frequency band of 1.65-2.95 GHz for a VSWR < 2, which shows enhanced bandwidth compared to the conventional SDP antenna.

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.

Design of Compact Series-fed Dipole Pair Antenna with End-loaded Rectangular Patches (사각형 패치가 종단에 장하된 소형 직렬 급전 다이폴 쌍 안테나 설계)

  • Yeo, Junho;Lee, Jong-Ig;Park, Jin-Taek
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.10
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    • pp.2245-2251
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    • 2013
  • In this paper, a design of a compact series-fed dipole pair(SDP) antenna with end-loaded rectangular patches is presented. In order to reduce the lateral size of a conventional SDP antenna, rectangular patches are end-loaded to the two dipole elements of the SDP antenna and a grooved ground plane is used by adding a patch at both ends of the ground plane. The effects of varying the length and width of the rectangular patches on the antenna performance such as input reflection coefficient are investigated. An optimized compact SDP antenna covering a frequency band ranging from 1.7 GHz to 2.7 GHz is designed and fabricated on an FR4 substrate. The total width of the fabricated prototype of the proposed antenna is reduced by approximately 14.3% compared to the conventional SDP antenna. Experimental results show that the antenna presents a 48.7% bandwidth in the range of 1.68-2.76 GHz and a stable gain of 5.6-6.0 dBi with minimal degradation. Moreover, a front-to-back ratio is improved by about 0.7 to 7.4 dB.

Design of Planar Dipole Pair Antenna for Indoor Digital TV Reception (실내 디지털 TV 수신용 평면 다이폴 쌍 안테나 설계)

  • Lee, Jong-Ig;Yeo, Junho;Han, Dae-Hee
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.11
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    • pp.2600-2606
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    • 2014
  • In this paper, a design method for a planar dipole pair antenna for an operation in the frequency band of 470-806 MHz for terrestrial indoor digital TV (DTV) is studied. The proposed antenna is composed of two planar dipoles connected through conducting strips, and the antenna is fed by a microstrip line. By employing different lengths of dipoles, a broadband characteristics is obtained, and the antenna is size-reduced by bending both ends of the longer dipole. The effects of design parameters on the antenna performance are examined by simulation, and the parameters are adjusted for terrestrial DTV band use. A prototype of the antenna for indoor DTV reception is fabricated on an FR4 substrate with a size of $240mm{\times}139.5mm$ and tested experimentally. The experiment results show that the frequency band for a VSWR < 2 ranges 458-864 MHz(61.4%), and it corresponds fairly well with the simulated band of 448-868 MHz(63.8%).

Design of Series-fed Dipole Pair Antenna Using Multiple Directors (다중 도파기를 사용한 직렬 급전 다이폴 쌍 안테나 설계)

  • Yeo, Junho;Park, Jin-Taek;Lee, Jong-Ig
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.471-472
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    • 2015
  • In this paper, a design method for enhancing the gain of a series-fed dipole pair (SDP) antenna using mutiple directors is studied. Strip-type directors are located above the second dipole of the SDP antenna, and the variations of the input VSWR bandwidth and gain depending on the length of the second dipole and the number of directors are analyzed. The antenna is optimized to obtain gain > 8 dBi in the frequency range of 1.7-2.7 GHz, which has three directors in the optimum design. The optimized antenna is designed on an FR4 substrate with a dimension of 86.2 mm by 152.3 mm, and it has frequency bands of 1.67-2.79 GHz for a VSWR < 2 and 1.69-2.72 GHz for a gain > 8 dBi.

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A Study on Bandwidth and Gain Enhancement of Series-fed Dipole Pair Antenna (직렬 급전 다이폴 쌍 안테나의 대역폭 및 이득 향상에 관한 연구)

  • Yeo, Junho;Lee, Jong-Ig
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.59-60
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    • 2017
  • In this paper, the bandwidth and gain enhancement of a series-fed dipole pair antenna (SDPA) using a modified balun., a director, and two parasitic patches is studied. The proposed SDPA consists of two strip dipoles with different lengths, a ground reflector, which are connected through a coplanar strip line, a director, and two parasitic patches. The modified balun is used to increase the bandwidth, whereas the director and two parasitic patches are appended to the SDPA to enhance the gain in the middle and high frequency band. A prototype of the proposed SDPA is fabricated on an FR4 substrate, and the experimental results show that the antenna has a frequency band of 1.56-3.10 GHz for a VSWR < 2, and measured gain maintains over 7 dBi in the frequency range of 1.55-3.00 GHz.

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A Study on Design Method of Band Rejection for Broadband Series-fed Dipole Pair Antenna (광대역 직렬 급전 다이폴 쌍 안테나의 대역 저지 설계 방법 연구)

  • Yeo, Junho;Lee, Jong-Ig
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.56-58
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    • 2013
  • In this paper, a design method to obtain a band rejection characteristic in the 2.4-2.484 GHz WLAN band is studied for a series-fed dipole pair (SDP) antenna operating in the band of 1.7-2.7 GHz for mobile communication base station applications. The band rejection characteristic is achieved by inserting U-shaped slots on the coplanar strip line connecting the two dipole elements of the SDP antenna. The effects of the location and dimension of the slots on the band rejection characteristics are examined. The optimized SDP antenna with WLAN band rejection is fabricated on an FR4 substrate and the experimental results show that the antenna has a desired band rejection performance with a frequency band of 1.65-2.78 GHz (51.0%) for a VSWR < 2, and a rejection band of 2.39-2.54 GHz.

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Series-Fed Dipole Pair Antenna with WLAN Band Rejection Characteristic (WLAN 대역 저지 특성을 가지는 직렬 급전 다이폴 쌍 안테나)

  • Yeo, Junho;Hong, Jae Pyo;Lee, Jong-Ig
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.4
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    • pp.1982-1987
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    • 2013
  • In this paper, a design method to obtain a band rejection characteristic in the 2.4-2.484 GHz WLAN band is studied for a series-fed dipole pair (SDP) antenna operating in the band of 1.7-2.7 GHz for mobile communication base station applications. The band rejection characteristic is achieved by inserting U-shaped slots on the coplanar strip line connecting the two dipole elements of the SDP antenna. The effects of the location and dimension of the slots on the rejection band characteristics are examined. The optimized SDP antenna with WLAN band rejection is fabricated on an FR4 substrate and the experimental results show that the antenna has a desired band rejection performance with a frequency band of 1.65-2.78 GHz (51.0%) for a VSWR < 2, and a rejection band of 2.39-2.54 GHz.

Design of a CPW-fed Double-Dipole Quasi-Yagi Antenna (CPW 급전 이중 다이폴 준-야기 안테나 설계)

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.11
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    • pp.1518-1523
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    • 2018
  • A method for designing a DDQYA fed by a CPW is proposed in this paper. The proposed CPW-fed DDQYA consists of two series-connected strip dipoles, a ground reflector, and a strip-pair director. Instead of the conventional microstrip feed line in which the signal line is located on the substrate opposite to the antenna, a CPW is used because CPW is located on the same side with the antenna, and so the fabrication is easy. The strip-pair director is composed of two horizontally-separated strips, and it is added above the second dipole to enhance the gain in the high frequency region. A prototype of the proposed CPW-fed DDQYA is fabricated on an FR4 substrate. The fabricated antenna has a frequency band of 1.66-3.38 GHz(68.3%) for a voltage standing wave ratio < 2, and measured gain ranges 5.0-7.3 dBi over a frequency band of 1.60-2.90 GHz.