Development of shared aperture dual configuration antenna for S/Ka-band communication

Chakrabarti, Satyajit

doi:10.1002/mop.29515

Cited by 15 publications

(11 citation statements)

References 10 publications

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“…This figure of efficiency was assumed based on our previous experience of prime focus and caseggrain reflector design and realization. 18,19,21,23,24 Similar optimization techniche is outlinedin References [18,19,24]. The optimized position of the twist-reflector is ≈82 mm from the vertex of the trans-reflector.…”

Section: Measurements and Discussionmentioning

confidence: 99%

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Polarization twist reflector antenna — A systematic design approach

Chakrabarti

2021

Int J RF Mic Comp-Aid Eng

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In this paper, we present an easy and systematic design approach to realize a polarization twist reflector antenna. Detail description has been provided on how to design a transreflector antenna and its constituents including the transreflector, the polarization twist-reflector, and the feed horn. Simple relations for calculation of reflection coefficients of the trans-reflector and the twist-reflector with plane wave incidence have been considered. Simple transmission line model based analyses have been presented. As it does not involve any integral equation or summation of series of some functions, the final results can be obtained within few seconds with the minimum computational resource requirement. Conductive gratings have been conceived for both trans-reflector and twist-reflector. Their performances have been optimized individually in terms of their grating parameters. A linearly polarized pyramidal horn located at the prime focus of the transreflector has been used for the excitation. A prototype of the complete antenna has been designed at Ka-band, fabricated and experimentally measured. 19% impedance bandwidth with average gain of ≈32.3 dBi has been demonstrated.

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Section: Measurements and Discussionmentioning

confidence: 99%

“…An additional field taper is established by the geometry of the dish, known as space attenuation (SA). 18,19 Diameter of this quasi-continuous reflector is chosen 150 mm from the gain-beamwidth requirement. Its F/D ratio is chosen 0.5, which produces reasonable cross polar discrimination (XPD) at microwave frequencies.…”

Section: Designmentioning

confidence: 99%

Polarization twist reflector antenna — A systematic design approach

Chakrabarti

2021

Int J RF Mic Comp-Aid Eng

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“…Frequency selective surface (FSS) is widely used in wireless and satellite communication as a periodic surface that can transmit or reflect the electromagnetic (EM) signal. 1 FSS founds different applications as microwave absorber, 2,3 radar cross section reduction, 4 antenna radome, 5 polarization converter, 6 sub reflector in cassegrain horn, 7 EM cloaking, 8 and as antenna superstrate for directivity enhancement. 9 Recently, circular array radiation theory is applied to represent the scattered field from a conducting cylindrical surface and the theory is extended for concentric array geometry to realize active cloaking at microwave frequency.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized dual stop band frequency selective surface with broadband linear co to cross polarization conversion ability

Dey

Koul

2021

Int J RF Microw Comput Aided Eng

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This work presents a miniaturized angularly stable frequency selective surface (FSS) on a single layer substrate. Unit cell comprises of convoluted circular rings connected cross dipole and linear arrow headed dipole printed on both sides of the substrate. A closely spaced dual stop band resonances are obtained at 10 and 14.3 GHz with frequency ratio of 1.43. FSS shows a À 10 dB stopband bandwidth (BW) from 7.32 to 11.05 GHz (40.61%) and 12.68 to 15.97 GHz (22.97%) with >30 dB stop band rejection at center frequencies. FSS poses the features of stable performance under change in polarization and angularly stable response up to 60 incident angle. Later the proposed FSS is printed on grounded thick dielectric substrate and it shows broadband reflection type co to cross polarization conversion from 7.2 to 17.32 GHz (82.54%) with polarization conversion ratio >80% and oblique angle stability up to 35 . To the best of authors' knowledge, this is the first time in literature a single unit cell geometry with two different properties, spatial filtering on transmission and polarization conversion on reflection have been designed and analyzed in details. A finite array with size 25 Â 25 of the proposed FSS is fabricated and the measured filter response shows a good agreement with simulated performance at normal and oblique incidences. The proposed FSS is used as a reflector of a dual band monopole antenna and the simulation results shows gain improvement of 5.51 and 3.8 dB at the two stopband frequencies.

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“…The common bands for space borne SARs are the L, S, C, and X-bands. To minimize the volume and weight of the SAR antenna, a shared aperture configuration for dual-or multi-bands are required, which will share the sub-systems behind the arrays [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. A shared aperture antenna SAA in L-and C-bands is proposed by Pokuls et al in [2] to fill the gap of shared aperture antenna technology using multilayer, which uses slots in the L-band and interlaced with microstrip patches operating in the C-band.…”

Section: Introductionmentioning

confidence: 99%

“…Zhou et al [12] provided differential feeding methods, and corporate binary feed networks were used to enhance the isolation between polarizations and good radiation pattern characteristics, respectively. A linear/circularly polarized SAA using parabolic reflector with prime focus configuration at S-band and Cassegrain feed configuration at Ka-band was proposed in [13]. A concept of Fabry-Perot resonant cavity as a metasurface to reduce the complexity of the SAR antenna was presented by Qin et al in 2016 [14].…”

Section: Introductionmentioning

confidence: 99%

A Single Layer S/X-Band Series-Fed Shared Aperture Antenna for Sar Applications

Kothapudi¹,

Kumar²

2017

PIER C

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Abstract-This paper presents our research work on designing a dual-band dual-polarized (DBDP) series-fed S/X-band shared aperture antenna (SAA) for synthetic aperture radar (SAR) applications. The proposed SAA DBDP X-band antenna is designed with the concept of series-fed 4-group 2 × 2 planar arrays with high impedance microstrip line feeding in both vertical and horizontal polarizations. By etching out the inner edge elements from 2 × 2 X-band subarrays in all the four-groups, the Sband element could be accommodated. The design evolution stages have been presented. The S-band (3.2 GHz) is best suited for volumetric soil moisture estimation using SAR and X-band (9.3 GHz) best suited for surveillance SAR applications and grain size estimation. To verify the antenna design concept, a prototype is fabricated and measured with both S-parameters and radiation characteristics including gain measurements. The antenna with reflection coefficient |S 11 | < −10 dB has an impedance bandwidth 3.12-3.42 GHz (9.3% BW) in S-band and 9.2-9.36 GHz (1.72% BW) in X-band. The measured isolation lS21l between two different bands in the same polarization is better than 25 dB, and the isolation between two different bands in two orthogonal ports is better than 30 dB. Measured gain of the antenna at S-band is better than 8.5 dBi at V-port and H-port, and X-band is better than 11 dBi at either port. Measured side-lobe level (SLL) at S-band is better than −17 dB at either port, and X-Band is better than −20 dB at either port. The overall size of the S/X-DBDP SAA is 100 × 100 × 1.6 mm 3 . Measured results of the S/X-DBDP SAA show good agreement with the finite integration technique (FIT) based computer simulation technology (CST) microwave studio.

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Development of shared aperture dual configuration antenna for S/Ka-band communication

Cited by 15 publications

References 10 publications

Polarization twist reflector antenna — A systematic design approach

Polarization twist reflector antenna — A systematic design approach

Miniaturized dual stop band frequency selective surface with broadband linear co to cross polarization conversion ability

A Single Layer S/X-Band Series-Fed Shared Aperture Antenna for Sar Applications

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