A Symmetrical Periodic Leaky-Wave Antenna With Backward-to-Forward Scanning

Tiwari, Ajay Kumar; Awasthi, Seema; Singh, Rajat Kumar

doi:10.1109/lawp.2020.2975062

Cited by 27 publications

(14 citation statements)

References 31 publications

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“…Thus, the proposed method can be used not only for computationally efficient surrogate modelling but it can also be used to realize stop band suppression within the limits of unit element and array design for the selected operation bands. Furthermore, Table 5 provides performance comparison with state-of-the-art designs [19], [39][40][41][42][43][44][45][46][47][48]. As it can be observed, although the radiation performance of the considered LWA is inferior compared to some of the designs reported therein, it should be noted that the size of the array of Fig.…”

Section: Results and Experimental Validationmentioning

confidence: 99%

On Decomposition-Based Surrogate-Assisted Optimization of Leaky Wave Antenna Input Characteristics for Beam Scanning Applications

Belen

Mahoutı

Koziel³

et al. 2021

IEEE Access

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Section: Results and Experimental Validationmentioning

confidence: 99%

On Decomposition-Based Surrogate-Assisted Optimization of Leaky Wave Antenna Input Characteristics for Beam Scanning Applications

Belen

Mahoutı

Koziel³

et al. 2021

IEEE Access

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“…It can be seen that some LWAs are able to radiate only in the forward direction or have poor radiation performance on the broadside 7,8 . Some other LWAs suppress the OSB and the continual backward‐to‐forward beam scanning is achieved 11–15 . The antenna gain of the proposed P‐LWA is the most stable among that of the prototypes from the references over a fixed scanning range.…”

Section: Measurementsmentioning

confidence: 91%

“…In addition, it is important for the P‐LWA to maintain stable gain in the operational frequency band, but this question is often overlooked. In recent years, most of the proposed continual backward‐to‐forward beam scanning P‐LWAs cannot achieve stable gain in the operational bandwidth 11–20 …”

Section: Introductionmentioning

confidence: 99%

A continual backward‐to‐forward beam scanning periodic microstrip leaky‐wave antenna with highly stable gain

Zhang

Zhou

2021

Micro & Optical Tech Letters

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A limitation of the traditional periodic leaky‐wave antennas (P‐LWAs) is the existence of the open‐stopband (OSB) with the antenna gain greatly reduced at broadside. In this paper, a novel periodic microstrip LWA with highly stable gain is proposed and the OSB is eliminated, realizing continual backward‐to‐forward beam scanning. The unit cell of the proposed antenna consists of a transversal slot, a narrow transversal slot and two intersecting oblique slots, as well as a metallic via. By adding a narrow transversal slot and adjusting the inclination of the oblique slots, the antenna gain keeps stable while it is operating. A prototype is proposed and analyzed, achieving continual backward‐to‐forward main‐beam scanning from 8 to 10.2 GHz. The main‐beam scans from −35° to +30° with the maximum gain of 11.36 dBi, and the antenna gain of 11.05 dBi is obtained at broadside at 9.3 GHz with no significant degradation. The variation value of the gain is less than 0.66 dB while the main‐beam is scanning from −28° to +15° near the broadside, indicating that the antenna gain is highly stable.

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“…Such LWAs are hard to match to the quasi‐TEM mode wave from the 2‐D parabolic reflectors, as we mentioned later. Another possible way to overcome the OSB limitation is using impedance matched LWA unit cells realized by employing short vias 18,19 or nonresonant slots 20,21 . The common OSB suppressed LWAs have multiple transmission line forms, such as microstrip, 22 substrate integrated waveguide (SIW), 16,21 Goubau line, 23 plasmonic waveguides supporting spoof SPPs, 24 and so on.…”

Section: Introductionmentioning

confidence: 99%

Multi‐beam SIW leaky‐wave antenna with 2‐D beam scanning capability for millimeter‐wave radar applications

Cao

Yan

2021

Int J RF Microw Comput Aided Eng

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In this article, a multi‐beam substrate integrated waveguide (SIW) leaky‐wave antenna (LWA) is proposed for millimeter‐wave radar applications, which owns the advantages of 2‐D scanning capability, high gain, low profile, and single layer configuration. The proposed antenna consists of a beam‐forming network (BFN) based on a 2‐D SIW parabolic reflector with eight waveguide feedings, and a 16‐element LWA array. The open‐stopband of the LWA is suppressed by employing a longitudinal slot into a conventional transverse slot LWA unit. In the E‐plane, the BFN can generate eight desired distributions of the amplitude and the phase gradients which steers beam from −17.3° to 30.8° with the crossover level higher than −5.22 dB. In the H‐plane, the frequency scanning LWA array can offer a continuous beam scanning range from −23° to 19° with operating frequency from 21 to 29 GHz. Finally, the antenna is prototyped and experimentally verified. The measured results are in accord with the simulated ones. The characteristics of the proposed antenna make it a very promising solution for applications in low‐cost millimeter‐wave radar systems.

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A Symmetrical Periodic Leaky-Wave Antenna With Backward-to-Forward Scanning

Cited by 27 publications

References 31 publications

On Decomposition-Based Surrogate-Assisted Optimization of Leaky Wave Antenna Input Characteristics for Beam Scanning Applications

On Decomposition-Based Surrogate-Assisted Optimization of Leaky Wave Antenna Input Characteristics for Beam Scanning Applications

A continual backward‐to‐forward beam scanning periodic microstrip leaky‐wave antenna with highly stable gain

Multi‐beam SIW leaky‐wave antenna with 2‐D beam scanning capability for millimeter‐wave radar applications

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