IEEE Transactions on Antennas and Propagation · 2011 · 424 citations · 16 references
EngineeringElectrical EngineeringAntennasMetallic MaterialsMicrowave EngineeringAntenna DesignAntenna RadiationAntenna SimulationMicrowave AntennasPlanar AntennasSmall AntennasExperimental Results InterpretationGainLeaky-wave AntennasPatch AntennasPrinted Antenna DesignPrinted AntennasSurface ImpedanceSurface Impedance Modeling
The paper presents a simple design procedure for a sinusoidally‑modulated reactance surface that enables radiation at arbitrary off‑broadside angles, including an efficient mapping of strip gaps to the desired surface impedance. The authors realize the SMRS by printing metallic strip arrays on a grounded dielectric substrate, mapping strip gaps to surface impedance, and designing a leaky‑wave antenna accordingly. The resulting TM‑polarized antenna radiates at 30° from broadside at 10 GHz with an experimental gain of 18.4 dB, and the design affords near‑independent control of leakage and phase constants, as verified by theoretical, simulated, and experimental results.
A simple procedure for designing a sinusoidally-modulated reactance surface (SMRS) that radiates at an arbitrary off-broadside angle is outlined. The procedure allows for nearly independent control of the leakage and phase constants along the surface. Printing an array of metallic strips over a grounded dielectric substrate is discussed as a way to practically implement the theoretical SMRS. A method of mapping the gaps between metallic strips to a desired surface impedance is presented as an efficient alternative to mapping methods used in the past. A printed leaky-wave antenna with a sinusoidally-modulated surface reactance is designed using the procedure mentioned above. The TM-polarized antenna radiates at 30° from broadside at 10 GHz, and exhibits an experimental gain of 18.4 dB. Theoretical, simulated, and experimental results are presented.
16