Dielectric image line groove antennas for millimeter waves, Part II: Experimental verification

Solbach, Klaus; Wolff, I.

doi:10.1109/tap.1985.1143664

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…The DIL topology has been used to create LWAs of different permittivity with different scanning capabilities at various frequencies [16], [20], [30]- [35]. A rectangular DIL with fixed aspect ratio of a = 2 • b, where a denotes its width and b its height, operates in single mode with good confinement of the field if…”

Section: Dielectric Image Line Leaky Wave Antennasmentioning

confidence: 99%

Reconfigurable Liquid Crystal Dielectric Image Line Leaky Wave Antenna at W-Band

et al. 2022

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This paper presents a reconfigurable dielectric image line leaky wave antenna at W-band. Reconfigurability is achieved by applying bias to anisotropic liquid crystal (LC) filled into the antenna. Instead of separating RF components and DC-bias network by complex or space consuming methods, the bias electrodes are simultaneously used as radiation elements. In order to evaluate this concept, a non-reconfigurable antenna with isolated unit cells is compared to a reconfigurable antenna, which has its unit cells connected by a metallic line. The non-reconfigurable demonstrator shows gain of up to 18 dBi and can scan through broadside from −30 • to +10 • in the investigated frequency range from 75 GHz to 102 GHz. This frequency scanning sector can be shifted by 10 • when utilizing the reconfigurable LC antenna, while gain of up to 15 dBi is maintained. Since the bias electrodes are directly mounted on the image line, less than 50 V is necessary to control the LC. The antenna is comparably easy to fabricate, and only one bias voltage is directly related to a steering angle, which can be advantageous compared to complex phased arrays with multiple LC phase shifters.INDEX TERMS Beam steering, dielectric image line, leaky wave antennas, liquid crystal, W-band.

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Section: Dielectric Image Line Leaky Wave Antennasmentioning

confidence: 99%

Reconfigurable Liquid Crystal Dielectric Image Line Leaky Wave Antenna at W-Band

et al. 2022

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“…A very attractive approach, which doesn't completely dispense with moving parts, is a tricky advancement of the image line antenna (Solbach and Wolff, 1985), which exploits the fact that inhomogeneities close to a dielectric wave-guide will cause radiation. An equidistant structure (grating) parallel to the wave-guide effects the radiation of a wave-front with a direction depending on the grating period.…”

Section: Radar Parametersmentioning

confidence: 99%

High resolution radar for automobile applications

Schneider

Wenger

2003

Adv. Radio Sci.

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Abstract. This contribution points out the potential of radar sensors with high resolution in azimuth and range in traffic environment and addresses some aspects of their practical implementation with respect to system design, hardware and software. A prototypical vehicle-based instrumentation radar is presented, which performs on-line acquisition and real-time visualisation of radar images with an update rate of up to 10 Hz. The enhanced perception capabilities of high resolution radar in traffic environment will be demonstrated with respect to new comfort and safety features, and practical realisation approaches concerning data processing and hardware including the scanning antenna will be discussed.

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“…DILs as the feeding networks provide the phase difference for the radiation units (microstrip patches). Slots and holes are carved in the ground plane of DIL to realize the DIL‐based LWA for millimeters waves. A LWA based on DIL for broadside radiation is proposed by using pairs of circular patches printed on the top of the DIL.…”

Section: Introductionmentioning

confidence: 99%

“…Various designs of DIL-based LWAs are reported [9][10][11][12][13] . DILs as the feeding networks provide the phase difference for the radiation units (microstrip patches) 9,10 .…”

Section: Introductionmentioning

confidence: 99%

Wide scanning angle LWA based on DIL with H‐shaped grooves

Wei

Liu

et al. 2018

Micro & Optical Tech Letters

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A dielectric image line (DIL)‐based leaky wave antenna (LWA) with H‐shaped grooves is proposed in this paper. By periodically carving a set of H‐shaped grooves in the ground of the DIL, infinite space harmonics are excited, and the proposed antenna works with n = −1 order mode. The H‐shaped radiator can effectively eliminate open stopband (OSB). Over the operating band from 11.1 GHz to 15 GHz, the beam of the proposed antenna scans widely from −72° to 31° (including the broadside) with the realized gain from 9.7 dBi to 12.9 dBi. A prototype is fabricated and measured, which testifies the design theory and the simulation results.

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Dielectric image line groove antennas for millimeter waves, Part II: Experimental verification

Cited by 6 publications

References 4 publications

Reconfigurable Liquid Crystal Dielectric Image Line Leaky Wave Antenna at W-Band

Reconfigurable Liquid Crystal Dielectric Image Line Leaky Wave Antenna at W-Band

High resolution radar for automobile applications

Wide scanning angle LWA based on DIL with H‐shaped grooves

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