Substrate Integrated Waveguide-Based Periodic Backward-to-Forward Scanning Leaky-Wave Antenna With Low Cross-Polarization

Karmokar, Debabrata K.; Guo, Y. Jay; Qin, Pei-Yuan; Chen, Shu‐Lin; Bird, Trevor S.

doi:10.1109/tap.2018.2835502

Cited by 80 publications

(32 citation statements)

References 36 publications

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“…The gap (S) between the edge of the microstrip line end and the centre of the first via is important, because it forces the wave toward the microstrip edges (see Figure 1(b)). A tapered feed port is used to improve the matching impedance of the proposed antenna [31]. The dimensions of the tapered feed line (w f 1 ) and (w f 2 ) are determined by using the equations in [32].…”

Section: Antenna Configurationmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Mohsen¹,

Isa²,

Isa³

et al. 2019

PIER C

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This paper presents a new technique to enhance impedance bandwidth of single layer half width microstrip leaky wave antenna (HW-MLWA) with continuous main beam scanning. The enhancement is realized by etching four circular slots on the radiation element. Two of the circular slots are placed close to the feed port, and the others are close to the matching load. The wide main beam scanning is between +12 • and +70 • when operation frequency sweeps between 4.3 GHz and 6.5 GHz. A comparison between the Uniform HW-MLWA (reference) and the proposed HW-MLWA with circular slots is provided to study the effectiveness of the added circular slots. The proposed HW-MLWA is fabricated and tested. The measured impedance bandwidth is 49.9% (4.28 GHz to 7.13 GHz) with peak gain 10.31 dBi at 5 GHz, hence the proposed antenna can be considered as a suitable candidate for C-band applications.

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Section: Antenna Configurationmentioning

confidence: 99%

“…The cross-polarization increases significantly when the main beam scanning from broadside to the forward direction and from lower frequencies to the higher frequencies. This is the major limitation of uniform MLWA [31]. Increase in cross polarization levels causes a distortion in the signal quality.…”

Section: Reduction Of the Cross Polarizationmentioning

confidence: 99%

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Mohsen¹,

Isa²,

Isa³

et al. 2019

PIER C

View full text Add to dashboard Cite

show abstract

“…Table 1 compares different characteristics of relevant recent works on frequency-scanned antenna arrays. The frequencyscanned antennas presented in [17], [18], [19], and [23] are fabricated using substrate-integrated waveguides. Due to the flexibility of planar fabrication, they can achieve a large steering range by closing the stop-band using perturbations in the waveguide.…”

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

“…One way to implement such periodic structures is through substrate integrated waveguides (SIW). Due to the flexibility in the fabrication of SIWs, perturbations such as vias can be easily used to close the stop-band of the periodic structure at broadside [18]- [19]. However, the dielectric loss in frequency-scanned SIW antennas limits their efficiency, gain, and beamwidth in the scanning plane.…”

Section: Introductionmentioning

confidence: 99%

A Frequency-Scanned Slow-Wave Waveguide Antenna at Millimeter-Wave Frequencies

Ohadi

Eleftheriades

2020

IEEE Access

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In this paper we describe the design, theory, implementation, and measurement results of a novel frequency-scanned slow-wave slotted waveguide antenna. The slow-wave antenna is fabricated by periodically loading a standard WR22 waveguide using cylindrical posts. The antenna has a backward radiation and can steer the beam from-72 o to-12 o by changing the frequency from 32.5 GHz to 37.4 GHz. The gain of the antenna remains within a 3 dB range from the maximum gain of 17 dBi throughout the steering range. The antenna is 29λ in length and 0.69λ in width. The antenna radiation efficiency is between 74% and 92% throughout its frequency range which allows for further extension of its length in order to achieve a higher gain and a smaller beamwidth. Moreover, the small lateral width of the antenna allows placing several of them side-by-side to either narrow or facilitate scanning the beam in the transverse plane. The antenna has a fast and constant scanning rate of 4.3 o over a 1% bandwidth and a return loss of less than-10 dB throughout its operating frequency range.

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“…These attractive features made these types of antennas suitable for modern wireless applications, such as automotive radar system applications, real‐time spectrum analyzer applications, and point‐to‐point satellite communications. Different types of leaky‐wave antennas (LWAs) have been reported so far, and most of them are either based on microstrip line or based on substrate‐integrated waveguide (SIW) technology, since their integration with other types of planar circuits is very easy. In References , transverse slot and H‐shaped slots are etched from the top of the SIW‐based structure in order to obtain single band forward beam scanning operation with the linear or circular polarization (CP).…”

Section: Introductionmentioning

confidence: 99%

Dual‐band dual‐polarized leaky‐wave structure with forward and backward beam scanning for circular polarization‐flexible antenna application

Rudramuni

Majumder

Kandasamy

2020

Micro & Optical Tech Letters

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In this paper, a novel dual‐band dual‐polarized leaky‐wave antenna (LWA) with polarization diversity is proposed using half mode substrate‐integrated waveguide (HMSIW)‐based technology. HMSIW LWAs are generally single band. In this work, by etching simple spiral type slots on the HMSIW cavity, a novel dual‐band dual‐polarized LWA is designed. The proposed antenna resonates at 5.6 and 8.5 GHz. Moreover, the antenna radiates the linearly polarized wave in the lower band and circularly polarized (CP) wave in the higher operating band. Also, in the higher operating band between 8.7 and 9.3 GHz, the proposed overall antenna exhibits both right‐hand circular polarization as well as the left‐hand circular polarization in the near main beam direction. The −10 dB impedance bandwidth of the proposed antenna at the lower and the higher operating bands are 27% (4.86‐6.4 GHz) and 25% (7.4‐9.6 GHz), respectively. In the higher band, the 3‐dB axial ratio bandwidth of 6.6% (8.7‐9.3 GHz) is achieved. The main beam of the antenna can be steered from 19° to 69° in the forward direction in the lower operating band. In the higher operating band, the antenna can steer the CP beam between −17° and −32°. In both the lower bands, the realized peak gain is observed around 13.3 dBi, whereas in the higher band, the realized peak gain is observed around 14 dBi.

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Substrate Integrated Waveguide-Based Periodic Backward-to-Forward Scanning Leaky-Wave Antenna With Low Cross-Polarization

Cited by 80 publications

References 36 publications

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

A Frequency-Scanned Slow-Wave Waveguide Antenna at Millimeter-Wave Frequencies

Dual‐band dual‐polarized leaky‐wave structure with forward and backward beam scanning for circular polarization‐flexible antenna application

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