Quasi-Planar Composite Microstrip Antenna: Symmetrical Flat-Top Radiation With High Gain and Low Cross Polarization

Pawar, Umesh Ankush; Chakraborty, Subhradeep; Sarkar, Tanmoy; Ghosh, Abhijyoti; Singh, L. Lolit Kumar; Chattopadhyay, Sudipta

doi:10.1109/access.2019.2918580

Cited by 20 publications

(3 citation statements)

References 30 publications

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“…The disadvantage of such a configuration is the significant separation between the phase center of the various subarrays, that is typically larger than half-wavelength at the frequency of operation, this leading to the appearance of grating lobes unless these are properly filtered by a flat-top radiation pattern at individual sub-array level. Many radiating structures have been proposed in the scientific literature to achieve flat-top radiation pattern characteristics [14]- [19]; however, due to their specific geometries [15], [19] and large dimensions in combination with broad beamwidth [14], [16]- [18], there is no easy way to adopt those as radiating elements in an array structure which is meant to deliver high gain and grating lobe free radiation even though in a limited scanning range. To achieve effective control on the sub-array radiation characteristics while maintaining large radiating element aperture, the same radiating elements can be re-used in the adjacent sub-arrays achieving, in this way, a sub-array overlapping.…”

Section: Introductionmentioning

confidence: 99%

Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics

et al. 2022

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This paper presents an antenna array organized in sub-arrays and composed of densely spaced dielectric-based radiating elements. To reduce the number of active components required in the array beamforming network, each sub-array consists of a single active element, directly fed, and several passive reactively loaded elements. State-of-the-art implementations of such arrays are typically based on rectangular air-filled waveguide radiators which provide a limited bandwidth and support a single linear polarization only. By utilizing the dielectric-based radiators presented in this work, a significant increase in the operating bandwidth of the array can be achieved. In this case, the aforementioned reactive loading is implemented through short-circuited dielectric-filled waveguides. By optimizing the position of the short circuits, the radiation pattern of the sub-array can be controlled and synthesized according to a given mask. To create a larger design flexibility, one can design the sub-array in the presence of the adjacent sub-arrays, so achieving their effective overlapping. By employing the considered design technique, a sub-array featuring flat-top radiation pattern characteristics in combination with low side-lobe levels and high gain was developed, manufactured, and thoroughly analyzed. An additional benefit of such design choice is the possibility of supporting two orthogonal polarizations.

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Section: Introductionmentioning

confidence: 99%

Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics

et al. 2022

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“…The above LLAs which are based on PPW, usually have a low profile in one plane so that the fan‐beam or flat‐top beam can be obtained in that plane. Compared with the other antennas which also deal with fan‐beam or flat‐top radiation, 15‐18 this kind of LLA has the advantages of low cost, lightweight, and easy fabrication.…”

Section: Introductionmentioning

confidence: 99%

A low‐profile wide‐scanning fully metallic lens antenna for 5G communication

Liu

Yang

et al. 2021

Int J RF Microw Comput Aided Eng

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A low‐profile wide‐scanning lens antenna operating at 5G millimeter‐wave (mm‐wave) frequencies (24‐29 GHz) is presented in this article. Based on the principles of parallel plate waveguide, the proposed lens consists of two almost‐parallel plates which have only one slot or ridge in their inner surfaces. Due to that the lens is filled with air, the prominent high loss of dielectric lens at mm‐wave frequencies can be avoided. The 22 monopole antennas are employed to feed the lens, providing over ±77° beam scanning coverage of −3 dB cross‐over level in the azimuth plane. Measured 3 dB beamwidths are 7°/69° in the azimuth/elevation plane at the middle frequency of 26.5 GHz, respectively. Measured aperture efficiency for the middle beam is 66% at 26.5 GHz, and varies between 40% and 69.4% over the operating frequency band. The results indicate that the proposed lens is an effective solution for the 5G wireless communications due to its wide‐angle scanning, lightweight, low cost, and easy fabrication.

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“…And it can be realized with phased array antennas, [2][3][4][5] metasurface-based beam-scanning integrated antennas, [6][7][8][9] reflection arrays 10,11 or the folded reflection array based on metasurfaces, 12 dielectric lens antennas, [13][14][15] and so forth. Recently, a novel design reported in 16 combined a single patch antenna along with two metallic monopoles to realize flat-top radiation. The physical mechanism deserves further investigation.…”

Section: Introductionmentioning

confidence: 99%

Fan‐beam antenna design based on metasurface lenses

Wang

Dong

Shen

et al. 2021

Int J RF Mic Comp-Aid Eng

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A fan‐beam antenna system based on metasurface lenses is proposed for backhaul antenna applications at 10.4 GHz. The planar metasurface lens is composed of three pairs of subwavelength unit cells with high transmission and opposite phase. These phase shifters are arranged to transform the Gaussian distributed near field from a linear patch antenna array into the sin c‐function distributed aperture field, which in turn brings a sector radiation pattern in the azimuth plane and a pencil beam in the elevation plane. The simulated and measured results demonstrate that the presented lens antenna offers a sharp roll‐off fan beam with the azimuth beamwidth 60°, elevation beamwidth 10°, and the gain 18.2 dB with the flat‐top ripple less than 2.0 dB.

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Quasi-Planar Composite Microstrip Antenna: Symmetrical Flat-Top Radiation With High Gain and Low Cross Polarization

Cited by 20 publications

References 30 publications

Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics

Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics

A low‐profile wide‐scanning fully metallic lens antenna for 5G communication

Fan‐beam antenna design based on metasurface lenses

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