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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...
A 76 GHz phased array antenna (PAA) using waffle-iron ridge waveguides with non-metal contacts has been developed. The non-metal contact technology has the advantage of avoiding losses due to imperfect metal contacts, and also facilitates the fabrication of small-size and multi-layer stacked structures. The principle and results of the developed phase shifter, radiator and feed network are presented...
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