Abstract
Integration of planar circuits to non-planar ones has been recently considered as a credible technique for low-cost mass production of microwave and millimeter-wave circuits andsystems. This paper regards these concepts that provide for a complete integration of planar circuits andwaveguid e filters synthesizedon a single substrate by means of metalizedpost (via-hole) arrays. A methodof d esigning a waveguide filter derived from a synthesis technique using dual array of inductive posts is presented. An experimental five-pole Chebyshev filter which has 2.5 dB insertion loss and return loss better than 10 dB is demonstrated. Such a technique of integration of planar andnon-planar circuits on the same substrate shows a significant reduction in size, weight and cost.
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