Title :
A narrow beam leaky-wave antenna using an artificial dielectric
Author :
Vishvakarma, Babau R. ; Sharma, Rajendra P.
Author_Institution :
Inst. of Technol., Banaras Hindu Univ., Varanasi, India
Abstract :
A narrow-beam leaky-wave antenna using an artificial dielectric (AD) is investigated. A planar slab with effective dielectric constant less than unity is considered. The slab is excited from one end, while the other end is kept open to support the radiation. The Kirchhoff-Huygen integration method is used to compute the radiation characteristics of the proposed antenna. The leaky-wave AD antenna considered is found to give a very sharp radiation beam of 1.25° without any significant sidelobe radiation. Typically, the antenna has a sidelobe level of 21 dB down the main lobe. A very restricted scanning angle of 4° is observed. A change in the beam-width of 0.25° is observed when the frequency is varied from 8.5 GHz to 10.5 GHz, which indicates a marked improvement in the beam-width variation with frequency
Keywords :
antenna radiation patterns; dielectric-loaded antennas; waveguide antennas; 8.5 to 10.5 GHz; Kirchhoff-Huygen integration method; artificial dielectric; beam-width; effective dielectric constant; narrow beam leaky-wave antenna; planar slab; radiation beam; radiation characteristics; scanning angle; sidelobe level; Dielectric constant; Frequency; Leaky wave antennas; Missiles; Propagation constant; Radar antennas; Radar applications; Slabs; Surface waves; Wires;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38457
