Hybrid Analog-Digital SAR Instrument with Reflector Antenna and Overlapped Subarray Feed for Earth Observation Articles uri icon

authors

  • Garcia, Quiterio
  • Orgaz, Lara
  • Del Castillo, Javier
  • Toso, Giovanni
  • Imbembo, Ernesto
  • Biurrun Quel, Carlos
  • Del Rio, Carlos
  • MEMELETZOGLOU, NAFSIKA

publication date

  • November 2021

start page

  • 2110

end page

  • 2114

issue

  • 11

volume

  • 20

International Standard Serial Number (ISSN)

  • 1536-1225

Electronic International Standard Serial Number (EISSN)

  • 1548-5757

abstract

  • As part of the European Space Agency (ESA) studies of new instrument for Earth observation, the design of a synthetic aperture radar (SAR) architecture based on overlapped array antennas was launched last year. The objective of the activity is to develop a test unit of a reflector based SAR antenna fed by an array organized in overlapped subarrays, supporting novel multichannel wide-swath SAR architectures, and exploiting multiple beams in both azimuth and range/elevation directions. In the letter, a hybrid analog/digital beamforming on reception with analog beamforming approach on transmission is analyzed. The antenna system consists of a large oversize reflector with a feedarray capable of generating multiple beams on receive for digital processing. In the letter, a description of the hybrid SAR Instrument is presented, describing the characteristics of the system, the antenna, the considered feedarray options and the main characteristics and system performances.

subjects

  • Telecommunications

keywords

  • antenna arrays; feeds; synthetic aperture radar (sar)