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Analytical Formulas for Frequency-unbalanced Periodic Leaky-wave Antennas

: Al-Bassam, A.; Otto, S.; Heberling, D.; Caloz, C.


Institute of Electrical and Electronics Engineers -IEEE-:
PhotonIcs & Electromagnetics Research Symposium - Spring, PIERS-Spring 2019. Proceedings : 17-20 June 2019, Rome, Italy
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-7281-3404-8
ISBN: 978-1-7281-3403-1
PhotonIcs & Electromagnetics Research Symposium (PIERS-Spring) <41, 2019, Rome>
Fraunhofer FHR ()

Periodic leaky-wave antennas (P-LWAs) are usually optimized in terms of frequency balancing (w-balancing) and Q balancing, where the resonance frequencies of the series and shunt modes (ω se , ω sh ) and their quality factors (Q se , Q sh ) that contribute to radiation are equalized. This paper performs a general study of the four radiation regimes in P-LWAs (ω-balancing/ Q-unbalancing, ω-balancing/ Q-unbalancing, ω-unbalancing/ Q-balancing and ω-balancing/Q-balancing) and provide analytical formulas of 1D P-LWA based on a network model. Finally, analytical results of important P-LWA parameters, such as propagation constant, Bloch impedance and radiation efficiency, are provided and discussed for the four regimes.