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NASA NTRS · 20220014496

Flat-Panel Wideband Dual-Circularly Polarized 8X8 Phased Array Antenna for SATCOM Applications

Sanghamitro Das·Satish K Sharma·Seth W Waldstein·James M Downey·Bryan L Schoenholz·Sarah M Dever·James A Nessel·Rudraishwarya Banerjee
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Abstract

A wideband, dual-circularly polarized (CP) 8×8 phased array is designed for operation at K-/Ka-band, which exhibits wide impedance and axial ratio (AR) bandwidths that encompass both of the desired satellite communication (SATCOM) bands of 22.55–23.55 GHz and 25.5–27.5 GHz. The array has a scan range of ±50° and ±36° at 23.05 GHz and 26.5 GHz, which are the center frequencies of the two aforementioned bands. The array has been integrated with a beamforming network utilizing 5G silicon RFICs, and the measurement results will be presented during the conference.

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BibTeXRIS

Sanghamitro Das, Satish K Sharma, Seth W Waldstein, James M Downey, Bryan L Schoenholz, Sarah M Dever, James A Nessel, Rudraishwarya Banerjee. Flat-Panel Wideband Dual-Circularly Polarized 8X8 Phased Array Antenna for SATCOM Applications. https://ntrs.nasa.gov/citations/20220014496

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A Wideband Dual Linear/Circular Polarized 64-Element Phased Array Antenna for SATCOM Applications

In this paper, a flat panel 8x8 phased array with a radio frequency integrated circuit (RFIC) based beamforming network (BFN), is proposed. The array works in dual linear in addition to dual circular polarizations over a bandwidth of 22-28 GHz, with a realized gain of 22-23 dBi/dBic in the broadside direction. The array achieves better than 3dB scan loss to ±50° and offers axial ratio (AR) below 3dB over the entire bandwidth within the proposed scan range. The array is comprised of innovatively engineered radiating elements, arranged distinctively in a 2x2 subarray level, thereby improving cross-polarized fields and axial ratio.

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