Analytical Study of Open-Stopband Suppression in Leaky-Wave Antennas

Rezaee, Sina; Memarian, Mohammad

doi:10.1109/lawp.2019.2963798

Cited by 24 publications

(16 citation statements)

References 16 publications

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“…The proposed antenna had wider bandwidth and scanning range along with the peak realized gain than [34][35][36][37] and in [35], only the SLL at the broadside is mentioned. There is no mention of SLL threshold for efficient scanning in any articles except [6,27,38,39]. The presented antenna had better scanning range than the first continuous scanning range of [6].…”

Section: Resultsmentioning

confidence: 87%

“…Planar periodic LWAs are low-profile, relatively easier to fabricate, and can scan in the backward or the forward endfire direction with a fan-beam radiation pattern with frequency tuning. Several types of LWAs based on a range of technologies have been proposed in the scientific literature, including periodically meandered rampart array [16], sharpening the bends [17], squarely modulated reactance surface (SquMRS) [18], composite right/left-handed structures (CRLH) [19,20], slot or coplanar lines [21], substrate integrated waveguide (SIW) structures [22][23][24][25][26][27], Goubau line structures [24], spoof plasmon transmission line (SSP-TL) structures [25], and periodically loaded microstrip structures [26].…”

Section: Introductionmentioning

confidence: 99%

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A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements

Ahmed

McEvoy

Ammann

2020

Sensors

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A printed edge-fed counterpart of the wire Bruce array antenna, for frequency scanning applications, is presented in this paper. The unit-cell of the proposed antenna consists of bowtie and semi-circular elements to achieve wide bandwidth from below 22 GHz to above 38 GHz with open-stopband suppression. The open-stopband suppression enables a wide seamless scanning range from backward, through broadside, to forward endfire. A sidelobe threshold level of −10 dB is maintained to evaluate efficient scanning performance of the antenna. The antenna peak realized gain is 15.30 dBi, and, due to its compact size, has the ability to scan from −64° to 76°.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements

Ahmed

McEvoy

Ammann

2020

Sensors

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“…Recently, a novel method has been presented to open stopband suppression in LWAs based on varied uniform guided-wave structure and studied it analytically at microwave frequencies [26]. LWAs based on the parallel-plate waveguide, where the top plate is replaced by a Huygens' bianisotropic metasurface of the Omega type [27], is among another method for solving the stopband problem.…”

Section: Introductionmentioning

confidence: 99%

Dirac leaky wave antenna for millimetre‐wave applications

Rezaee¹,

Memarian²,

Eleftheriades³

2020

IET Microwaves, Antennas & Propagation

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Dirac dispersion cones enable remarkable wave phenomena in electronics as well as electromagnetic systems. In this work, the authors experimentally demonstrate for the first time the Dirac leaky wave antennas (DLWAs) at millimetre‐wave (mm‐wave) frequencies. The demonstrated DLWAs are implemented in the substrate integrated waveguide technology, delivering unprecedented features at high frequencies such as radiation at, and continuous beam scanning through broadside, with ease of fabrication, making these designs well suited for mm‐wave applications such as emerging fifth generation and Internet of Things, radar and imaging. It is shown that a planar Dirac photonic crystal can be realised composed of air columns inside a host SIW waveguide, exhibiting a closed bandgap and linear dispersion around broadside. Phase and attenuation constants are controlled to obtain directive beam and scanning in a wide range of angles (from −30° to 20°). The presented DLWAs have a wide impedance bandwidth around 28 GHz with high efficiency, and operate with peak gains of about 16 dBi with <1 dB gain variation throughout the frequency range from 25 to 31 GHz. Several designs have been proposed, and their prototypes were fabricated using standard substrates. Measured results show excellent agreement with the simulated results, validating the proposed concepts.

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“…Microstrip line [15] and waveguide [5] are the common used guiding structures. Reference [16] proposed a lowprofile FSA based on substrate integrated waveguide (SIW), which achieved a wide scanning range of −30 • ∼30 • and a maximum gain of 10 dB. The SIW technology provides a reasonable tradeoff between the dielectric-filled metallic waveguide and microstrip technologies, which have the advantages of relatively low loss, low profile and ease in integration.…”

Section: Introductionmentioning

confidence: 99%

Frequency Scanning Single-Ridge Serpentine Dual-Slot-Waveguide Array Antenna

et al. 2020

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This paper presents a novel one-dimensional (1D) frequency scanning dual-slot-waveguide array antenna with versatile advantages such as large scan volume, high frequency sensitivity, low crosspolarization and low sidelobe. Electromagnetic waves radiate through the leaky-wave dual slots, machined on the side chambers of the single-ridge serpentine waveguide. By properly designing the serpentine waveguide, which plays the role of delay line, such 1D frequency scanning array antenna can achieve 39 • scanning over a frequency range from 9.7 GHz to 10.3 GHz, and high frequency sensitivity of 65 • /GHz. The dual slots with all the adjacent monomers inclined in same direction are designed to acquire low cross-polarization and avoid high-order mode radiation. The cross-polarization is 45 dB lower than the corresponding co-polarization over the whole working band. Taylor aperture distribution is employed to achieve a low sidelobe (−21 dB). The nonresonance VSWR is below 1.2, and meanwhile the resonance VSWR remains a low level, around 2.5. Furthermore, our proposed 1D array as a building block can compose a novel 2D electric scanning array, with frequency scanning in one dimension and phase scanning in the orthogonal dimension. A 2D array consisting of three waveguide elements is simulated to predict the phase scanning performance, and the results indicate that a 120 • scanning performance can be obtained. At last, a 1D serpentine dual-slot-waveguide array antenna is fabricated, whose measurements show good agreement with simulations. INDEX TERMS Single-ridge waveguide, dual slots, frequency scanning, phase scanning.

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Analytical Study of Open-Stopband Suppression in Leaky-Wave Antennas

Cited by 24 publications

References 16 publications

A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements

A Wide Frequency Scanning Printed Bruce Array Antenna with Bowtie and Semi-Circular Elements

Dirac leaky wave antenna for millimetre‐wave applications

Frequency Scanning Single-Ridge Serpentine Dual-Slot-Waveguide Array Antenna

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