Truss-type deployable reflector antenna systems for synthetic aperture radar mounted on a small spacecraft

Abstract

The paper describes the principles of constructing antennas for the Earth remote sensing synthetic aperture radar (SAR) systems mounted on the small spacecrafts and based on the truss-type deployable reflector antennas developed by JSC "OKB MEl". The basis of reflectors is a rigid truss framework. Metallic mesh grid playing the role of reflecting surface is attached to this frame work. The possibility of providing electronic beam scanning with a small step for ScanSAR mode is realized by the usage of complex feed, consisting of an array of antennas, microwave switches and power divider. Two S-band SAR deployable reflector systems de signed for Russian and Chinese small spacecrafts are presented. PACKPbIBAK)L1WIEC� 3EPKAIlbHbiE AHTEHHblE CVlCTEMbl Cl>EPMEHHOrO TVinA .QIl� PCA, PA3MELUAEMbiX HA MAIlblX KOCM�4ECKVlX AnnAPATAX Ye60TapeB A. C., naHTeneeB B. A., <t>e�3ynna H. M., MvnpocpaHoB E. M., nnaCH1KoB A. H. OA 0 «Oco6oe KOHcmpYKmopCKoe 61Opo MocKoBcKoao 3HepaemUlJeCKOaO uHcmumyma» (OA 0 «OKS M3t1») yn.

Deployment Impact Experiment and Dynamic Analysis of Modular Truss Antenna

“…For example, the 5.2 m diameter PETA truss antenna is developed by General Dynamics Corporation (GDC) [9]. The 7 m diameter truss deployable antenna reflector developed by Johnson Space Center (JSC) was successfully applied to the "Kondor" spacecraft [10]. And Jet Propulsion Laboratory (JPL) in the United States has studied a modular truss deployable antenna based on shape memory composite deployment hinge for large aperture and high surface accuracy antenna [11].…”