Analysis of near-field Cassegrain reflector: plane wave versus element-by-element approach

Houshmand, B.; Lee, S.-W.; Rahmat‐Samii, Y.; Lam, P.

doi:10.1109/8.55612

Cited by 2 publications

(1 citation statement)

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“…In this work we propose a broadband antenna array concept as a reflector feed in an out-of-focus phased-array configuration within a reflector system such as [18]- [20]. The feed consists of a connected array of slots focusing in the near field [21].…”

Section: Introductionmentioning

confidence: 99%

Focused Connected Array Antenna as a Broadband Beam-Steering Feed for Quasi-Optical System

Laguna

Cavallo

Baselmans

et al. 2022

IEEE Trans. Antennas Propagat.

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This paper proposes a broadband and efficient integrated focal plane array solution based on a near-field focused connected array of slots. The focused aperture provides (1) broadband and highly efficient illumination of the quasioptical system, and (2) scanning capabilities within a focusing system. The connected array antenna in turn allows for a fully integrated solution that can synthesize a focused aperture while providing broadband impedance matching. Focused connected array antennas enable the coupling to a reflector system over bandwidths in excess of one octave and with aperture efficiencies in excess of 60%. To demonstrate the concept we present two printed circuit board (PCB) prototypes operating in the band 3-6 GHz and yielding more than 60% reflector aperture efficiency under broadside illumination and allowing to scan one beamwidth at the lowest frequency with a frequency-averaged scan loss of 0.2 dB. The feasibility of scaling this concept to THz frequencies and with dynamic beam-steering capabilities is discussed in the context of a superconducting device.

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Section: Introductionmentioning

confidence: 99%