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Lima, E. B., Costa, J. R. & Fernandes, C. A. (2019). Multiple-beam focal-plane dual-band fabry–pérot cavity antenna with reduced beam degradation. IEEE Transactions on Antennas and Propagation. 67 (7), 4348-4356

E. J. Lima et al.,  "Multiple-beam focal-plane dual-band fabry–pérot cavity antenna with reduced beam degradation", in IEEE Transactions on Antennas and Propagation, vol. 67, no. 7, pp. 4348-4356, 2019

@article{lima2019_1713604042060,
	author = "Lima, E. B. and Costa, J. R. and Fernandes, C. A.",
	title = "Multiple-beam focal-plane dual-band fabry–pérot cavity antenna with reduced beam degradation",
	journal = "IEEE Transactions on Antennas and Propagation",
	year = "2019",
	volume = "67",
	number = "7",
	doi = "10.1109/TAP.2019.2911365",
	pages = "4348-4356",
	url = "https://ieeexplore.ieee.org/document/8692379"
}

TY  - JOUR
TI  - Multiple-beam focal-plane dual-band fabry–pérot cavity antenna with reduced beam degradation
T2  - IEEE Transactions on Antennas and Propagation
VL  - 67
IS  - 7
AU  - Lima, E. B.
AU  - Costa, J. R.
AU  - Fernandes, C. A.
PY  - 2019
SP  - 4348-4356
SN  - 0018-926X
DO  - 10.1109/TAP.2019.2911365
UR  - https://ieeexplore.ieee.org/document/8692379
AB  - Focal-plane reflector feeds with shared aperture are a promising solution for the increasing number of beams required in the Ka -band satellite services. Stringent manufacturing tolerances and coupling between feeds tend to penalize performance, which is aggravated for a dual band. This paper proposes a new design of a shared aperture antenna intended for multispot single-feed-per beam satellite applications that allows recovering single-feed performance, minimizing the usual impact of adjacent feeds on the field distribution and ultimately on the antenna directivity and gain. We present a new focal-plane dual-band Fabry–Pérot cavity antenna (FPCA) design, which allows more reliable fabrication, closer agreement with simulations, and larger bandwidth than the reported solutions. It uses only one double-sided printed frequency-selective surface (FSS) to form the dual-band FPCA, and it is fed through a novel arrangement of double-layer slots in the FPCA-printed ground plane. This favors impedance matching and higher isolation between adjacent feeds. The effectiveness of the solution is experimentally demonstrated for a single-feed Ka -band (20 and 30 GHz) prototype. The generalization for a complete multifeed configuration with filters is shown by full-wave simulations. The decoupling slots on the FPCA ground plane enable restoring single-feed performance in the multifeed system, over the bandwidth of interest.
ER  -