Bi-directional notch antenna with parasitic elements for tunnel booster system

Arai, Hiroyuki; Kohzu, K.; Mukaiyama, Takashi; Ebine, Yoshio

doi:10.1109/aps.1997.625410

Cited by 14 publications

(8 citation statements)

References 4 publications

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“…To the best of the authors' knowledge, antennas with bidirectional radiation and beam tilt characteristics have not been reported for helmet applications. While antennas with bidirectional radiation characteristics have been developed by utilizing improved microstrip antennas [3,4], back‐to‐back antennas [11,12], surface wave antennas [5], end‐fire antennas [13], shaped notch antennas [14], slot antennas based on a SIW transmission line [15], metamaterial inspired antennas [16], improved monopole antennas [17], and open‐ended waveguide antennas [18], these antennas are typically applied in outdoor MIMO base stations, coal mines, subways/street microcells, broadcasting base stations, indoor mobile robots, and intelligent transportation systems. As a result, antenna size for such applications is not a main concern, and these bulky antennas cannot be directly used for wearable devices such as helmets.…”

Section: Introductionmentioning

confidence: 99%

S‐shaped planar antenna with 45° tilted bidirectional radiation pattern for motorcycle helmets

Kim

et al. 2020

Int J RF Microw Comput Aided Eng

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An S-shaped planar antenna (SPA) with a bidirectional radiation pattern and beam tilt characteristic is proposed to achieve maximum communication distance for helmet applications. The proposed SPA is comprised of an S-shaped radiation strip (consisting of a microstrip meander line and two main arms with two inverted L-shaped parasitic elements) and a rectangular ground plane, where a simplified microstrip power divider is introduced by modifying the feed structure in the center of the SPA, such that the S-shaped radiation strip works in the second resonant mode. The proposed SPA generates a tilted beam in the E-plane with an angle of 45 , which is attributed to the obliquely staggered arms of the antenna at a distance. By introducing inverted L-shaped parasitic elements at the end of the two arms, the directivity of the bidirectional radiation pattern can be further improved, thereby increasing the antenna gain. The working principle is analyzed theoretically, and the effects of the antenna structural parameters on the radiation pattern are also analyzed. The experimental results indicate that the 3:1 VSWR impedance bandwidth is 120 MHz, with a realized peak gain of 1.5 dBi at 2.45 GHz. The proposed antenna is designed for real-world applications, allowing the antenna to be obliquely installed while keeping the peak gain direction horizontal for maximum communication distance.

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Section: Introductionmentioning

confidence: 99%

S‐shaped planar antenna with 45° tilted bidirectional radiation pattern for motorcycle helmets

Kim

et al. 2020

Int J RF Microw Comput Aided Eng

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“…For some long and narrow path service areas, such as the tunnel, highway, railway and the corridor, bidirectional antennas are preferred to be applied for the mobile devices in order to increase the zone size, expand the cell length and maximise the link efficiency [7,8]. The bidirectional antennas also have been utilised from commercial wireless communication to military areas such as radar application [9], ultra wideband system [10] and linear wireless sensor network [11].…”

Section: Introductionmentioning

confidence: 99%

A bidirectional planar monopole antenna array for WiFi/Bluetooth and LTE mobile applications

Zhou

Arslan

2013

2013 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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This paper presents a novel bidirectional planar monopole antenna array, with its feeding network, to apply for WiFi/Bluetooth and LTE mobile standards. The planar array is comprised of monopole antenna elements that utilise Archimedean spiral slots, inspired as resonance paths, in order to generate multi-band performance. Contrary to conventional structures, the feeding network is composed of three Wilkinson power dividers, for the purpose of providing synchronised output signals over the required frequency range, miniaturising dissipation losses and decreasing mutual coupling. Simulation and measurement results are presented for a single antenna element, an initial Wilkinson power divider and a four-element planar array, which reside on FR4 substrates. Successfully comparison between simulated and measured results verifies that the single antenna element achieves a 10 dB reflection coefficient from 2.2GHz to 2.9GHz, and the planar antenna array illustrates a 10 dB return loss bandwidth from 2.4GHz to 3.1GHz, which could cover WiFi/Bluetooth (2.45GHz) and LTE (2.6GHz) mobile applications. The proposed planar monopole antenna array also obtains large gain, high efficiency, narrow beam, low side lobe level and highly symmetric bidirectional radiation pattern in both E-and H-plane.

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“…For some specific services where the mobile users move along the straight roads such as highways, railways and tunnels, bidirectional antennas are especially preferred to be used in order to maximize the link efficiency [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The typical bidirectional antenna was accomplished by installing two unidirectional antennas in the opposite directions [7], but the directivity was not high, and the design was complicated. Researchers also proposed some compact planar bidirectional antennas, while the gain was limited by the substrate [8,9].…”

Section: Introductionmentioning

confidence: 99%

A Compact Stacked Bidirectional Antenna for Dual-Polarized Wlan Applications

Jia¹,

Li²

2013

PIER C

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A compact stacked bidirectional antenna is presented for dual-polarized 2.4 GHz WLAN applications in this paper. The antenna consists of an orthogonal coupling feed driver and stacked director array, with the overall size 50 × 50 × 160 mm 3 . Dual-polarization is excited by the orthogonal coupling lines, and the director array contributes to the bidirectional radiation. Both the coupling feed driver and directors are printed on FR4 substrate and supported by plastic pillars. The measured bandwidth of the two ports are 2.33-2.62 GHz (11.8%) and 2.32-2.64 GHz (13%) under the condition of VSWR less than 2. The isolation between two ports is lower than −20 dB. The peak gains along one radiation direction are 9.65 dBi and 9.30 dBi for each port, with highly symmetric bidirectional beam pattern. The proposed antenna is compact and suitable for dualpolarized bidirectional 2.4 GHz WLAN applications.

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Bi-directional notch antenna with parasitic elements for tunnel booster system

Cited by 14 publications

References 4 publications

S‐shaped planar antenna with 45° tilted bidirectional radiation pattern for motorcycle helmets

S‐shaped planar antenna with 45° tilted bidirectional radiation pattern for motorcycle helmets

A bidirectional planar monopole antenna array for WiFi/Bluetooth and LTE mobile applications

A Compact Stacked Bidirectional Antenna for Dual-Polarized Wlan Applications

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