A fast and slow wave combined-mode metamaterial ridged waveguide for array antenna applications

A new structure for a `metamaterial' ridged waveguide with the ability to control wavelength is proposed. The structure has the remarkable features of a wide control-range in wavelength from the fast-wave to slow-wave regions across the TEM wavelength in free space, and a waveguide impedance-control function that is independent of wavelength. This feature can improve the performance of array antennas in the reduction of grating lobes and side lobes.

[1]  E. Rajo-Iglesias,et al.  Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates , 2009, IEEE Antennas and Wireless Propagation Letters.

[2]  Koichi Ogawa,et al.  A 76GHz phased array antenna using a waffle-iron ridge waveguide , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[3]  H. Kirino,et al.  A 76 GHz Multi-Layered Phased Array Antenna Using a Non-Metal Contact Metamaterial Waveguide , 2012, IEEE Transactions on Antennas and Propagation.

[4]  Eva Rajo-Iglesias,et al.  Losses in ridge gap waveguide compared with rectangular waveguides and microstrip transmission lines , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[5]  H. Kirino,et al.  Metamaterial ridged waveguides with wavelength control for array antenna applications , 2012, 2012 International Symposium on Antennas and Propagation (ISAP).