Design of a Compact Multielement Monopulse Feed for Ground-Station Satellite Tracking Applications

Roy, Shibendu Shekhar; Saha, Chinmoy; Nagasekhar, T; Mane, Sandesh Bhimrao; Padmavathy, C. S.; Umadevi, G.; Mallenahalli, Naresh K.

doi:10.1109/lawp.2019.2927236

Cited by 18 publications

(9 citation statements)

References 7 publications

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“…The typical back-to-back configuration is used differently here. Taking advantage of the fact that septum polarizers designed for feed applications generally have a circular waveguide flange [1]- [4], [6], the relative angular orientation of the two septa, the angle θ illustrated in Fig. 2, may be used as variable in place of multiple line lengths.…”

Section: Axial Ratio Characterization Technique a Descriptionmentioning

confidence: 99%

“…They are commonly used in waveguide feed systems onboard communication satellites at frequencies ranging from C-band up to Ka-band [1]- [4], avoiding the need for polarization alignment between the onboard and the ground antennas. They are also implemented in ground stations [5], [6] and microwave instruments at millimeter-wave and sub-terahertz frequencies [7]- [9], as well as terrestrial systems, such as surveillance radars and test range probes. The main appeal of this component is to combine high polarization purity over a broad fractional bandwidth of typically 15%-20% and a simple mechanical design compatible with high-precision manufacturing techniques used in space and sub-terahertz systems.…”

Section: Introductionmentioning

confidence: 99%

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C-Band Septum Polarizers With Polynomial Profile and Accurate Axial Ratio Characterization in Back-to-Back Configuration

Fonseca

Angevain

2022

IEEE J. Microw.

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Septum polarizers have been used in waveguide systems for over 50 years and are very popular in communication satellites operating in circular polarization. With the progress of computational electromagnetics and computer hardware, combined with advances in manufacturing techniques, there has been a growing interest in septum polarizers with smooth profiles. In particular, a design using Legendre polynomials was recently introduced by the authors. This paper reports on the first experimental validation of this component and introduces also alternative profiles based on cubic splines. The new designs account for considerations on the overhang angle, which is an important parameter in additive layer manufacturing. The axial ratio of these designs is evaluated using a simple and accurate technique based on a back-to-back configuration, which can be implemented outside an anechoic chamber. The proposed characterization technique relies on the custom flanges implemented on the circular common port of septum polarizers to interface with horn antennas. These flanges typically have an 8-fold rotational symmetry, which enables to perform multiple measurements of a back-to-back configuration without requiring further equipment. The measured data is then processed to obtain the axial ratio of the two septum polarizers. This characterization technique is particularly advantageous when a large number of feeds needs to be tested, which is relevant in current and future broadband communication satellites. The technique is validated by comparing with measured data acquired in an anechoic chamber using a standard technique. Various prototypes, designed for operation in C-band communication satellite downlink, are characterized and promising results are obtained, showing very good agreement between simulated and measured data.

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Section: Axial Ratio Characterization Technique a Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

C-Band Septum Polarizers With Polynomial Profile and Accurate Axial Ratio Characterization in Back-to-Back Configuration

Fonseca

Angevain

2022

IEEE J. Microw.

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“…4,5 Cavity backing with various shapes of dipoles was explored with 3 dB beamwidth ≤105°. [6][7][8][9] Different tracking antennas were reported in references [10][11][12][13][14][15][16][17][18][19]. Although microstrip antennas have a low profile, their use is restricted due to their low-power handling capability.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12]18,19 A 2 × 2 array of cross dipoles was reported with a 3 dB beamwidth of 54°and a quarter wavelength profile. 13 The profiles and footprints are several wavelengths in references [14][15][16][17], although they have high-power handling capability. However, none of these reports tracked bandwidth wider than 13% and the field-of-view (FOV) wider than 52°.…”

Section: Introductionmentioning

confidence: 99%

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Lower profile high‐power dual‐polarized wide‐beam tracking antenna at S‐band

Chakrabarti

Sadhukhan

Chakraborty

et al. 2022

Micro & Optical Tech Letters

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An S‐band dual linearly polarized monopulse tracking antenna has been developed with a cavity‐backed cross‐dipole antenna as the element. Wide‐beam and wideband tracking have been successfully demonstrated. Systematic design approaches have been presented. The cavity arrangement enhances the beamwidth of a horizontal dipole significantly retaining its wideband characteristics. The element exhibits a 3 dB beamwidth ≥145°. Such a wide beamwidth made the cavity‐backed cross dipole an attractive choice as the element for the tracking antenna. The monopulse antenna demonstrates an impedance bandwidth ≥20.7% with isolation superior to 24 dB. Dual polarized tracking has been effectively verified over ≥15% bandwidth with a broad‐side gain of 11.2 dBi. The angular field‐of‐view (FOV) for the tracking is ≥60°. Higher tracking bandwidth and wider FOV of the array, lower profile, and high‐power handling capability are the superiority of the developed antenna.

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Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

Wang,

Sun,

Wang

et al. 2024

Heliyon

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Design of a Compact Multielement Monopulse Feed for Ground-Station Satellite Tracking Applications

Cited by 18 publications

References 7 publications

C-Band Septum Polarizers With Polynomial Profile and Accurate Axial Ratio Characterization in Back-to-Back Configuration

C-Band Septum Polarizers With Polynomial Profile and Accurate Axial Ratio Characterization in Back-to-Back Configuration

Lower profile high‐power dual‐polarized wide‐beam tracking antenna at S‐band

Evaluation methods of BDS-3 ground-segment defensive capability oriented to satellite navigation countermeasures

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