A new method for the design of slot antenna arrays: Theory and experiment

Abstract

Abstract-The present paper proposes and validates a new general design methodology that can be used to automatically find proper positions and orientations of waveguide-based radiating slots capable of realizing any given radiation beam profile. The new technique combines basic radiation theory and waveguide propagation theory in a novel analytical model that allows the prediction of the radiation characteristics of generic slots without the need to perform full-wave numerical solution. The analytical model is then used to implement a low-cost objective function within a global optimization scheme (here genetic algorithm.) The algorithm is then deployed to find optimum positions and orientations of clusters of radiating slots cut into the waveguide surface such that any desired beam pattern can be obtained. The method is verified using both fullwave numerical solution and experiment.

Collocated MIMO travelling wave SIW slot array antennas for millimetre waves

“…An array of IDs are located at ( x d , y d , z d ) and they are oriented along the angle ( θ d , ϕ d ). At an observation point ( x , y , z ), the $\vec{ E }$ and $\vec{ H }$ fields radiated by an array of N magnetic IDs can be expressed as [30–34], where c o is the speed of light in vacuum, k o is the free space wave‐number and n n represents the unit vector from the n th ID location to an observation point, and it can be expressed as …”

“…An array of IDs are located at (x d , y d , z d ) and they are oriented along the angle (θ d , ϕ d ). At an observation point (x, y, z), the $\vec{ E }$ and $ \vec{ H }$ fields radiated by an array of N magnetic IDs can be expressed as [30][31][32][33][34],…”

“…Extending these designs methodologies to design MIMO antenna systems for mobile terminals at mm-waves will be difficult. Recently, a new design methodology for travelling wave rectangular waveguide arrays at mm-waves was presented in [30][31][32][33][34]. This methodology considered a simple feeding and can orient the beam in oblique directions.…”

Theory of Nonsinusoidal Small Antennas with Applications to Near-Field Communication System Analysis and Design

“…Finally, we add that the theory presented in this paper can be expanded to include larger antennas by aggregating the effects of individual infinitesimal dipoles using the Infinitesimal Dipole Model (IDM) technique, which is an electromagnetic machine learning capable of learning from NF or FF data the best small dipole model capable of representing radiation everywhere in the exterior domain [73][74][75][76][77][78][79][80][81]. The details of this expansion will be the subject of future work.…”

Slot antenna array synthesis using the infinitesimal dipole model technique: Theory and experiment

“…In this way, there is no need to find the slot impedance or to consider the total impedance matrix of the entire slot array as has been done so far in the literature. Preliminary results about the synthesis of a slotted waveguide using this new technique have been reported in Reference 16. In the present article, we first develop a general theoretical treatment of coupled radiating slots using the surface equivalence theorem and a new magnetic‐type current Green's function.…”