Planar Leaky-Wave Antenna With Flexible Control of the Complex Propagation Constant
- 16 December 2011
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 60 (3), 1625-1630
- https://doi.org/10.1109/tap.2011.2180320
Abstract
This communication demonstrates for the first time the capability to independently control the real and imaginary parts of the complex propagation constant in planar, printed circuit board compatible leaky-wave antennas. The structure is based on a half-mode microstrip line which is loaded with an additional row of periodic metallic posts, resulting in a substrate integrated waveguide SIW with one of its lateral electric walls replaced by a partially reflective wall. The radiation mechanism is similar to the conventional microstrip leaky-wave antenna operating in its first higher-order mode, with the novelty that the leaky-mode leakage rate can be controlled by virtue of a sparse row of metallic vias. For this topology it is demonstrated that it is possible to independently control the antenna pointing angle and main lobe beamwidth while achieving high radiation efficiencies, thus providing low-cost, low-profile, simply fed, and easily integrable leaky-wave solutions for high-gain frequency beam-scanning applications. Several prototypes operating at 15 GHz have been designed, simulated, manufactured and tested, to show the operation principle and design flexibility of this one dimensional leaky-wave antenna.Keywords
This publication has 21 references indexed in Scilit:
- Design of Short Microstrip Leaky-Wave Antenna With Suppressed Back Lobe and Increased Frequency Scanning RegionIEEE Transactions on Antennas and Propagation, 2009
- CRLH metamaterial leaky-wave and resonant antennasIEEE Antennas and Propagation Magazine, 2008
- Substrate Integrated Waveguide Leaky-Wave Antenna: Concept and Design ConsiderationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- Studies of suppression of the reflected wave and beam-scanning features of the antenna arraysIEEE Transactions on Antennas and Propagation, 2005
- Guided-wave and leakage characteristics of substrate integrated waveguideIEEE Transactions on Microwave Theory and Techniques, 2005
- Periodic analysis of a 2-D negative refractive index transmission line structureIEEE Transactions on Antennas and Propagation, 2003
- A novel method for short leaky‐wave antennas to suppress the reflected waveMicrowave and Optical Technology Letters, 2002
- Dominant mode leaky-wave antenna with backfire-to-endfire scanning capabilityElectronics Letters, 2002
- Integrated microstrip and rectangular waveguide in planar formIEEE Microwave and Wireless Components Letters, 2001
- Partially reflecting sheet arraysIEEE Transactions on Antennas and Propagation, 1956