In this letter, a novel inductive post half mode substrate integrated waveguide (HMSIW) bandpass filter is presented. The filter keeps the advantages of an SIW filter but with a reduction of nearly one-half in size. A very good agreement is observed between the simulation and the measurements.

No abstract

Abstract-Two closed form approximations are given for mutual coupling between arbitrarily oriented slots with cosinusoidal distribution, using the known results for dipoles along with a new correction factor to account for the piecewise sinusoidal dipole current. Using these approximations, a scheme has been developed for calculating mutual coupling between practically used slots of arbitrary orientation and useful results are obtained from simple closed form expressions for slot separation of 1.2 × slot length or more depending upon the approximation chosen and the length of the slot. These approximations are found to be more accurate than those available in the literature, with a maximum error of less than 1.6% for slots shorter than 0.5 wavelength and separated by 0.85 × wavelength or more. Simple yet accurate expressions for mutual coupling, like the point dipole approximation developed here, result in efficient evaluation of mutual coupling for the design of large arrays of slots or for Electromagnetic Compatibility analysis.

No abstract

No abstract