Improved Design of Uniform SIW Leaky Wave Antenna by Considering the Unwanted Mode

Malekshah, Amin Mahmoodi; Attari, Amir Reza; Majedi, Mohammad Saeed

doi:10.1109/tap.2020.2975292

Cited by 10 publications

(12 citation statements)

References 17 publications

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“…5(a). A ULWA can only scan the forward quadrant, i.e., from broadside to forward endfire [1]− [5], [45]− [47], [48]. This is because only the fundamental Floquet mode (n = 0) propagates in the ULWA.…”

Section: Leaky-wave Antennamentioning

confidence: 99%

A Review of Reconfigurable Leaky-Wave Antennas

et al. 2021

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A comprehensive survey of the reconfigurable leaky-wave antennas (LWAs) is made in this paper. Beam-steering and unique radiating features of LWA are highlighted particularly. Therefore, radiation mechanism of different types of LWA, including uniform, quasi-uniform, periodic, and metamaterial LWAs are discussed in detail. The guiding structures for realizing LWAs, namely microstrip, waveguide, substrate integrated waveguide (SIW), and half-mode SIW (HMSIW) are investigated as well. Basic concepts of electronic beam-scanning LWAs are also introduced, and several state-of-the-art reconfigurable LWAs are studied thoroughly. The investigated reconfigurable LWAs are suitable for beam-scanning applications due to their compactness, ease of implementation, reasonably high gain, and relatively wide beam-scanning range, as will be demonstrated through this comprehensive review.

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Section: Leaky-wave Antennamentioning

confidence: 99%

A Review of Reconfigurable Leaky-Wave Antennas

et al. 2021

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“…Recently, an improved method for design of uniform LWA has been proposed with considering the unwanted mode [12]. This consideration, results in precise calculation of the leakage constant of the desired leaky mode.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we modify the design method presented in [12], by suppression of the unwanted mode. This modification results in better agreement between the desired and designed radiation patterns.…”

Section: Introductionmentioning

confidence: 99%

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Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode

2021

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In this paper, periodic perturbations are employed on the broad wall of a substrate integrated waveguide (SIW) long slot leaky-wave antenna (LWA) to eliminate the excited unwanted mode. The presence of unwanted mode in the uniform LWA is identified by using the amplitude and phase of the electric field at the slot. Using the electric field data in the structure, propagation constants and amplitudes of desired and unwanted modes are obtained. In order to preserve the desired leaky mode and suppress the unwanted mode, periodic transverse slots are added to one side of the uniform longitudinal slot. Suppressing unwanted mode results in good consistency between the desired and designed radiation characteristics. Comparison between two LWA designs, with and without suppressing unwanted mode, for achieving -25 dB sidelobe level (SLL) and beam direction of 40° at 17 GHz, demonstrates high accuracy of the proposed design procedure. A prototype of the modified antenna is fabricated, and measured results are presented at 16, 17, and 18 GHz for validation.

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“…Since substrate integrated waveguide (SIW) was proposed, it has attracted a large number of researchers to apply it to microwave and millimeter wave communication systems because of its high Q value, low loss, and easy processing and integration [1][2][3][4][5][6][7]. Its most common applications are filter design [8][9][10][11] and antenna design [12][13][14][15]. Different shapes of SIW cavities have been studied, such as rectangular [16][17][18], circular [19][20][21], and triangular [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Compact bandpass filter based on single isosceles right triangular substrate integrated waveguide cavity and modified complementary compact microstrip resonant cell

Liu

et al. 2021

IEICE Electron. Express

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Improved Design of Uniform SIW Leaky Wave Antenna by Considering the Unwanted Mode

Cited by 10 publications

References 17 publications

A Review of Reconfigurable Leaky-Wave Antennas

A Review of Reconfigurable Leaky-Wave Antennas

Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode

Compact bandpass filter based on single isosceles right triangular substrate integrated waveguide cavity and modified complementary compact microstrip resonant cell

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