Side Launched Dual Circularly Polarized Monopulse Tracking Feed Element for LEO Satellites

Roy, Shibendu Shekhar; Mane, Sandesh Bhimrao; Nagasekhar, T; Kumar, Mayur; Saha, Chinmoy; Antar, Yahia M. M.

doi:10.1109/apusncursinrsm.2018.8609217

Cited by 2 publications

(2 citation statements)

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“…As RHCP and LHCP signals are available at coaxial SMA output, this configuration is very compact in nature. Septum bifurcates the circular polarizer in two half circular parts from which RHCP and LHCP signals are collected via coaxial SMA probe with a cap on its top [11].Measured S11 and S21 results of the proposed tracking element (i.e tracking waveguides attached with CSP) are shown in figure 6(a) and 6(b) revealing a good match with the simulated results. Simulated Difference array gain, as shown in figure 8(b), is 10.1 dBi.…”

Section: Design Of Tracking Elementsmentioning

confidence: 53%

“…Corrugated horn is used as main element as it offers superior performance in terms of low cross polarization and symmetric beam, thanks to its linear aperture field [9], [10]. Use of electrically coupled CSP [11] allows access of dual polarized signal in the form of coaxial output making the feed a compact one eliminating waveguide joints and bulky extra elements. S-band feed consists of an array of dielectric rods fed by CSP arranged in 2×2 square configurations.…”

Section: Introductionmentioning

confidence: 99%

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Dual Band (S-X) Ground Station Antenna for Low Earth Orbit (LEO) Satellite Tracking Application

et al. 2022

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Design and realization of a dual band, dual polarized composite monopulse tracking feed, covering S-(2.0-2.3 GHz) and X-band (7.8-8.5 GHz) is reported in this article. X-band feed is a five element monopulse feed, comprising a corrugated horn acting as the main or Sum element surrounded by four circular septum polarizers serving as tracking elements. S-band feed is a four element monopulse feed consisting of square dielectric array arranged in 2×2 configurations. Illumination efficiency of the proposed composite feed, positioned in the same Cassegrain plane, is above 90 % for both the bands. S/X composite feed is systematically designed, fabricated and experimentally characterized revealing excellent correspondence with the simulated result. The realized composite feed is installed in 7.5m antenna system at NRSC Hyderabad, ISRO, India and currently fully operational. Expected / targeted G/T of 32 dB/K is achieved with the realized antenna system. The proposed feed is highly efficient, compact, simple and costeffective, uses generic design style and perfectly suitable as ground station reflector feed antenna, meeting stringent industry specification.INDEX TERMS Monopulse feed, dual band, corrugated horn, circular septum polarizer, cassegrain, secondary pattern.

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Section: Design Of Tracking Elementsmentioning

confidence: 53%