Reducing Side-Lobe Level of Surface Mounted Printed Leaky-Wave Antenna

Javanbakht, Nima; Syrett, Barry; Amaya, Rony E.; Shaker, J.

doi:10.23919/eucap48036.2020.9136020

Cited by 2 publications

(5 citation statements)

References 15 publications

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“…As a result, the field transition into the slots region became more uniform which contributed to the reduction of unwanted radiation from the feed and lower SLL. In this paper, similar to, 26 SLL was reduced solely by modifying the feed. In other words, we intentionally avoided modification of the slotted radiating section containing transverse slots to address the issue of undesired radiation from the microstrip transition.…”

Section: Structure Of the Antennamentioning

confidence: 99%

“…LWA is a traveling wave antenna in which the wave leaks into space through the discontinuities 8‐38 . LWAs are categorized into uniform, 13‐18 quasi‐uniform, 19‐24 and periodic 25‐29 Uniform LWA has a uniform cross‐section containing a single long slot. While quasi‐uniform and periodic LWAs have periodic cross‐sections and radiation occurs from the periodic slots on the surface of the antenna.…”

Section: Introductionmentioning

confidence: 99%

“…SIW is a compact waveguide wherein via fences replacing the metallic sidewalls. Low cost and compactness are among the attractive features of SIW LWA structures 13‐15,22‐27 that render them suitable candidates for 5G applications such as vehicle to everything (V2X) communications 3,4 . The size of the SIW can be reduced by removing half of the structure.…”

Section: Introductionmentioning

confidence: 99%

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A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

Javanbakht

Amaya

Shaker³

et al. 2021

Int J RF Microw Comput Aided Eng

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A novel method for confining the undesired radiation of the feed transition of a low‐profile leaky‐wave antenna (LWA) is demonstrated in this paper. The proposed design method uses novel tapered CPW transitions resulting in variation of the parasitic capacitance and electrical length of the feed. This leads to the reduction of the side‐lobe level (SLL), which is dictated by the feed and the slotted sections of the antenna. The undesired radiation from the feed becomes crucial in the low‐profile antenna in which the surface‐mounted connector along feed transition is the only practical feeding mechanism. The key novelty of the proposed approach is the reduction of SLL by exclusively modifying the feed structure rather than the slotted radiation section. To validate the proposed approach, a modified compact feeding mechanism for LWA is designed. The antenna is realized based on the substrate integrated waveguide (SIW). The antenna's length, width, and height are 110 mm, 31 mm, and 0.5 mm, respectively. The operating frequency band was chosen as 26 to 30 GHz, covering an allocated 5G band. The measured peak realized gain and SLL are 6.1 dBi and − 11.4 dB, respectively. An improvement of 5.7 dB in SLL compared to the conventional LWA was observed. The simple fabrication process and efficiency of the proposed method make it a viable approach for reducing the SLL of the low‐profile antennas. Compactness, low SLL, and proper gain of the reported antenna make it a suitable candidate for 5G vehicle to everything (V2X) communications and mm‐wave navigation systems.

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Section: Structure Of the Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

Javanbakht

Amaya

Shaker³

et al. 2021

Int J RF Microw Comput Aided Eng

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“…The length, width, and thickness of the proposed antenna are 110 mm, 31 mm, and 1.3 mm, respectively [61]. The extra conductive layers are shown in pink color that establish a tapered CPW transition at each end.…”

Section: Structure Of the Siw Lwamentioning

confidence: 99%

“…Increasing the number of reconfigurable cells without changing the period results in a higher directivity at the expense of increasing the cost, size, and the loss of the antenna. The SLL can also be reduced by tapering the slots [54], the via fence [52], the period of cells [53], or the feed transition [61]. In the proposed design, all varactor diodes had similar applied bias voltage.…”

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confidence: 99%

Analysis and Design of Low-Profile Reconfigurable Leaky-Wave Antennas Based on Substrate Integrated Waveguide for 5G Millimeter-Wave Applications

Javanbakht¹

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5G millimeter-wave (mm-wave) applications have several challenges, such as detection accuracy, interference from other channels, high path loss, covering several users in a dense area, and vulnerability to the environmental conditions. Several antenna technologies were proposed in this dissertation to address some of the above-mentioned challenges in 5G applications with a focus on wireless networks and vehicle to everything (V2X) communications.Leaky-wave antennas (LWAs) are suitable candidates for 5G mm-wave applications due to their beam-scanning capability, compactness, low cost, and ease of fabrication.Substrate integrated waveguide (SIW) and half-mode substrate integrated waveguide (HMSIW) are suitable candidates for realizing LWAs because of their low-profile and integration capability.Several design approaches were introduced in this dissertation to improve the performance of SIW/HMSIW LWAs in 5G mm-wave applications. Some of the proposed antennas have a relatively wide beam-scanning range, suitable for radar systems and V2X communications, while others have small beam-squint, suitable for point-to-point communications and seeker antennas.Tapering the side aperture of an HMSIW and the feed transition of a SIW resulted in side-lobe level (SLL) reduction to enhance the detection accuracy and reduce sensitivity to interference. Applying the proposed methods reduced the SLL of an HMSIW LWA and a SIW LWA to -11.2 dB and -11.4 dB, respectively, in the mm-wave frequency band. I want to thank my wonderful family, Mr. Saeed Javanbakht, Mrs. Mozhdeh Etminan, and Ms. Ayda Javanbakht, for all their supports. I also want to thank my magnificent supervisors, Prof. Barry Syrett, Prof. Rony E. Amaya, and Prof. Jafar Shaker, for their supports and guidance during my Ph.D. studies, as they are like mentors and role models to me. I am grateful to the Ph.D. examination committee, Prof. Dereck McNamara, Prof.

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Reducing Side-Lobe Level of Surface Mounted Printed Leaky-Wave Antenna

Cited by 2 publications

References 15 publications

A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

A tapered CPW fed leaky‐wave antenna based on substrate integrated waveguide with reduced side‐lobe level

Analysis and Design of Low-Profile Reconfigurable Leaky-Wave Antennas Based on Substrate Integrated Waveguide for 5G Millimeter-Wave Applications

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