Title :
Bandwidth analysis of highly-directive planar radiators based on partially-reflecting surfaces
Author :
Lovat, Giampiero ; Burghignoli, Paolo ; Capolino, Filippo ; Jackson, David R.
Author_Institution :
Dept. of Electr. Eng., La Sapienza Univ. of Rome, Rome
Abstract :
In this work, bandwidth properties of planar leaky-wave antennas made of a grounded dielectric slab covered with a partially-reflecting surface are investigated. The partially-reflecting surface is described by an equivalent shunt susceptance. It is shown that, with respect to a constant frequency-independent susceptance, the antenna bandwidth is not reduced using a frequency-dependent model, except for very specific cases. With reference to passive lossless structures, numerical examples are provided that illustrate the attainable performance and confirm the theoretical analysis.
Keywords :
dielectric devices; leaky wave antennas; photonic band gap; planar antennas; bandwidth analysis; equivalent shunt susceptance; frequency-dependent model; grounded dielectric slab; highly-directive planar radiators; partially-reflecting surfaces; passive lossless structures; planar leaky-wave antennas; theoretical analysis; Antenna arrays; Bandwidth; Dielectrics; Frequency; Leaky wave antennas; Performance analysis; Performance loss; Shunt (electrical); Slabs; Slot antennas; Fabry-Perot cavity; Leaky-wave antennas; electromagnetic-bandgap structures; partially-reflecting surfaces;
Conference_Titel :
Antennas and Propagation, 2006. EuCAP 2006. First European Conference on
Conference_Location :
Nice
Print_ISBN :
978-92-9092-937-6
DOI :
10.1109/EUCAP.2006.4584719
