Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 65, Issue 12, Pages 7009-7018Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2017.2762011
Keywords
Discrete lens antenna; dual band; dual polarization; Ka-band; transmitarray antenna (TA)
Funding
- National Research Agency through the project TRANSMIL [ANR-14-CE28-0023]
- Agence Nationale de la Recherche (ANR) [ANR-14-CE28-0023] Funding Source: Agence Nationale de la Recherche (ANR)
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Dual-band transmitarray antennas are demonstrated at Ka-band with the capability of forming independent linearly polarized beams with a given polarization in each frequency band, while sharing the same radiating aperture. The proposed three-layer unit-cell is based on identical narrow microstrip patches printed on both receiving and transmitting layers and connected by a metallized via hole. The metal layers are printed on two identical substrates bonded with a thin film, and the designed unit-cell exhibits a 180 degrees phase resolution (i.e., 1-b phase quantization). The dual-band dual-polarized property of the transmitarray is achieved by interleaving unit-cells operating in the down-link and up-link frequency bands. Four different prototypes are characterized to demonstrate the relevance of the proposed concepts. A good agreement is obtained between the radiation patterns, gain curves, and cross-polarization levels measured and computed in both frequency bands and polarizations.
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