Design and Measurement of a Novel Seamless Scanning Leaky Wave Antenna in Ridge Gap Waveguide Technology

Dong, Xiaochun; Wang, Hongjian; Xue, Fei; Liu, Yang

doi:10.2528/pierm17051801

Cited by 7 publications

(6 citation statements)

References 24 publications

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“…Quevedo-Teruel is with Electromagnetic Engineering Lab of School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden (e-mail: oscarqt@kth.se). and directive antennas [7], [7]- [9], [9]- [21]. In [7], [7]- [9], [9]- [21], leaky-wave antennas (LWAs) were proposed as an interesting solution due to its structural simplicity and single feeding mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…and directive antennas [7], [7]- [9], [9]- [21]. In [7], [7]- [9], [9]- [21], leaky-wave antennas (LWAs) were proposed as an interesting solution due to its structural simplicity and single feeding mechanism. Unfortunately, their principal drawback is that the radiation pattern is dispersive, i.e., the main beam is frequency-scanned [22], thus creating unwanted beam squint which reduces the practical bandwidth with high gain at the desired scanning direction.…”

Section: Introductionmentioning

confidence: 99%

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Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology

Wang

Gómez‐Tornero

Rajo‐Iglesias

et al. 2018

IEEE Trans. Antennas Propagat.

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In this paper, the use of a dispersive prism with a triangular shape is proposed to reduce the dispersive radiation nature of a leaky-wave antenna in groove gap waveguide technology. The operation of gap waveguide technology is based on the use of metallic pins that act as an artificial magnetic conductor, so the electromagnetic fields are confined and guided in the desired directions. To control a leaky-wave radiation of these confined fields is possible by tailoring the height of the pins, its periodicity and the waveguide width. This radiation, as in any conventional leaky-wave antenna, is dispersive, leading to beam squint as frequency is varied. Here, we mitigate this beam squint by using a prism made of dispersive pins and choosing appropriately their periodicity and height. With this prism, the leaky-wave radiation is focused into one single direction in a wide frequency-band.This concept is demonstrated with a prototype designed to radiate at ϕ=41 • with a central frequency of 12 GHz and high-gain of 16.5 dBi. A 22% frequency bandwidth for the 3-dB realized gain at ϕ=41 • is achieved, and the main radiating direction, with half-power beamwidth of 5 • , steers only ±0.5 • from 11.4 to 13.4 GHz.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology

Wang

Gómez‐Tornero

Rajo‐Iglesias

et al. 2018

IEEE Trans. Antennas Propagat.

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“…The LWAs require ridges to achieve backward, broadside, and forward radiation, relying on multilayer substrates for fabrication purposes [16][17][18]. Recently, a planar SIW based LWA is proposed for the suppression of OSB using the impedance matching technique [19], [20].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Substrate Integrated Waveguide Leaky Wave Antenna with Open Stop Band Suppression and Radiation Efficiency Equalization through Broadside

Agrawal¹,

Belwal²,

Gupta³

2018

RADIOENGINEERING

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A planar asymmetric substrate integrated waveguide leaky wave antenna is proposed with open stop band suppression and radiation efficiency equalization through broadside for the Ku-band. The stop-band behavior exhibited at broadside in the 1-D periodic structure is significantly reduced using reflection cancellation technique by placing the two slots at a quarter distance within the unit cell. Furthermore, asymmetric technique is applied. The asymmetry is introduced with respect to both axial and transversal axis of the structure so as to match the atbroadside Bloch impedance and off-broadside Bloch impedance. This provides total open stop band suppression and radiation efficiency improvement as well as equalization through broadside. The problem is analyzed with the help of Bloch impedance behavior. For illustration of the above techniques; single slot, double slot and asymmetric designs are developed for the proposed leaky wave antenna. The final asymmetric design after optimization is fabricated. Measured results are almost consistent with the simulation results with complete suppression of open stop band, efficiency improvement and equalization through broadside providing continuous beam scanning from -32° to +27° with constant gain of ~12.5 dBi.

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“…Gap waveguide technology is based on parallel-plate waveguide configuration and using a periodic array of electromagnetic bandgap structure to control the direction of propagation. In fact, this technology overcomes the problem of good electrical contact associated with mechanical assembly in different microwave components especially at high frequencies [6][7][8][9][10][11]. There are many modern manufacturing technologies that can be used to produce planar surfaces with small texture, such as die sink Electrical Discharge Manufacturing (EDM), Electron Beam Melting (EBM), multilayer die pressing, and 3D screen-printing.…”

Section: Introductionmentioning

confidence: 99%

Design of a Ku-Band Filter Based on Groove Gap Waveguide Technology

Zarifi¹,

Nasri²

2018

PIER Letters

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This paper presents a Ku-band filter based on groove gap waveguide (GGW) technology which is composed of a filter with two transitions GGW and WR-62. The filter is operated from 13.8 GHz to 14.2 GHz. Actually, a fractional bandwidth of about 2.85% is obtained for maximum return loss of 20 dB and the maximum insertion loss of 0.05 dB over the bandwidth. The validity of the design results is confirmed both numerically and experimentally. Measurement results show that the performance of filter agrees well with simulation. This filter could be used as part of a gap waveguide based structure.

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Design and Measurement of a Novel Seamless Scanning Leaky Wave Antenna in Ridge Gap Waveguide Technology

Cited by 7 publications

References 24 publications

Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology

Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology

Asymmetric Substrate Integrated Waveguide Leaky Wave Antenna with Open Stop Band Suppression and Radiation Efficiency Equalization through Broadside

Design of a Ku-Band Filter Based on Groove Gap Waveguide Technology

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