Sine-Wall Space-Tapered Linear Slot Array Antenna With Low Sidelobe and Second-Order Lobe Levels

Pesarakloo, Ali; Sedighy, Seyed Hassan; Hodjat-Kashani, F.

doi:10.1109/tap.2017.2786310

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…Several efforts have been performed to solve the first shortcoming . An iris has been employed next to the centerline longitudinal slot antenna to excite it .…”

Section: Introductionmentioning

confidence: 99%

“…Other methods have been used asymmetrical ridge waveguides, wiggly ridge waveguides, or double ridge waveguides to excite the centerline longitudinal slot antennas . In other attempts, the centerline longitudinal slot antennas have been fed by nonuniform waveguides or waveguides with artificial magnetic conductor side walls . Although these methods are effective in exciting the centerline longitudinal slot antennas, the application of them is usually restricted by their construction difficulty.…”

Section: Introductionmentioning

confidence: 99%

“…[42][43][44][45] In other attempts, the centerline longitudinal slot antennas have been fed by nonuniform waveguides or waveguides with artificial magnetic conductor side walls. [45][46][47][48][49] Although these methods are effective in exciting the centerline longitudinal slot antennas, the application of them is usually restricted by their construction difficulty.…”

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confidence: 99%

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Employing double posts to excite the centerline longitudinal slot antennas

Moradian

2020

Micro & Optical Tech Letters

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A straightforward method is introduced for feeding the longitudinal slot antennas, which are centered along the waveguide centerline. In the proposed method, two posts are introduced next to each slot. The posts are arranged such that they have offsets from the waveguide centerline. Furthermore, the posts are placed near the tips of the slots. The performed study shows that the spacing between the posts as well as their offsets from the centerline is the main parameters that control the radiated energy by the antennas. To verify the effectiveness of the suggested slot antennas, some design graphs are derived for a special case of the suggested slot antennas and a linear array is then designed, implemented, and measured. The usefulness of the suggested slot antennas is validated by a design example and its simulation and the measurement results. K E Y W O R D S centerline longitudinal slot antenna, linear array antennas, post in rectangular waveguide

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“…Several efforts have been performed to solve the first shortcoming . An iris has been employed next to the centerline longitudinal slot antenna to excite it .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Employing double posts to excite the centerline longitudinal slot antennas

Moradian

2020

Micro & Optical Tech Letters

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“…Unfortunately, these alternating offsets of the adjacent slots initiate some lobes in the radiation pattern of the antennas which are undesirable in some applications . Several efforts have been conducted to eliminate these undesirable lobes …”

Section: Introductionmentioning

confidence: 99%

“…The screw depths or the post distances from the centreline is used to control the intensity of the radiated power by the slots. Other attempts such as nonuniform waveguides or artificial magnetic conductor side walls have also been proposed to excite the centreline longitudinal slot antennas . However, these methods are more or less difficult to implement.…”

Section: Introductionmentioning

confidence: 99%

Employing irises and septums to excite the centreline longitudinal slot antennas

Moradian

2019

Int J RF Microw Comput Aided Eng

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A suitable method is introduced to excite the centreline longitudinal slot antennas. For each slot, an iris and a rectangular septum are employed at the opposite sides of the slot such that they have offset from the waveguide centreline. It is shown that to form a high performance slotted array antenna consists of the centreline longitudinal antennas, employing antenna elements where each of them is excited only by an iris or a septum is not advisable. So, employing an iris and a septum all together is proposed to excite the centreline longitudinal slot antennas. This enables one to have a better control over the characteristics of the proposed slot antennas. The performed study indicates that the proposed slot antennas can be modelled as a shunt admittance on a transmission line. In order to demonstrate the effectiveness of the proposed slot antennas, a two-by-three planar array is designed, constructed and tested. The efficacy of the proposed slot antennas is verified by the simulation and the measurement results. K E Y W O R D S butterfly lobes, centreline longitudinal slots, computer-aided design, iris excited centreline longitudinal slot antenna, septum excited centreline longitudinal slot antenna, slot antennas

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Unequally spaced resonant slotted‐waveguide antenna array with low side lobe level based on an open‐ended substrate integrated waveguide resonator

Taheri

Majedi

2020

Micro & Optical Tech Letters

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In this article, an unequally spaced resonant slotted‐waveguide antenna array with low side lobe level (SLL) is presented. In the conventional resonant arrays with longitudinal slots on the waveguide broad wall, slots must be separated one half guided wavelength (λg/2) from each other and be on opposite sides of the center line to have an in‐phase excitation. The open‐ended substrate integrated waveguide (SIW) resonator can support a resonance mode with the infinite wavelength. Hence using this kind of resonator, distances between slots in the resonant array are free parameters and can be optimized to achieve a low SLL. Based on the mentioned resonator, a 10‐element resonant slotted‐waveguide antenna array at 10 GHz with 10° beam‐width is designed and simulated. The distances between slots are determined by using genetic algorithm (GA). This antenna has been fabricated and measured. The measurement results show that the SLL of the presented antenna is 16 dB.

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Sine-Wall Space-Tapered Linear Slot Array Antenna With Low Sidelobe and Second-Order Lobe Levels

Cited by 10 publications

References 24 publications

Employing double posts to excite the centerline longitudinal slot antennas

Employing double posts to excite the centerline longitudinal slot antennas

Employing irises and septums to excite the centreline longitudinal slot antennas

Unequally spaced resonant slotted‐waveguide antenna array with low side lobe level based on an open‐ended substrate integrated waveguide resonator

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