Mm-wave antennas in package for 5G applications

This article presents latest developments on mm-wave microstrip antennas in package at TNO. Two designs examples for 5G applications are presented: a 28 GHz Antenna in Package (AiP) module for mobile handset and a 26 GHz array antenna for base stations (BS), both in dual linear polarization. The AiP module consists of 2 linear arrays for...

Adversarial patch camouflage against aerial detection

Common-mode rejection in a connected array of dipoles with inherent frequency selectivity properties

In this work we describe an effective strategy for the avoidance of common-mode resonances excited in a printed array of loaded dipoles with inherent filtering properties (filtenna). Previous works demonstrated that, for E-plane scanning, such resonances occur due to the unbalanced excitation of the dipoles. The present approach is based on the...

Multilayer Array Antennas With Integrated Frequency Selective Surfaces Conformal to a Circular Cylindrical Surface

In this paper, we present the analysis of periodic arrays on cylindrical surfaces using open-ended waveguide radiators loaded with radomes and frequency selective surfaces (FSS). The multilayer structure can be used to obtain a filtering behavior by properly choosing the radomes and the size of the FSS apertures. The effect of the gradual cutoff...

Problem-Matched Basis Functions for Microstrip Coupled Slot Arrays Based on Transmission Line Green's Functions (TLGF)

Problem matched basis functions are proposed for the method of moments analysis of printed slot coupled microstrips. The appropriate equivalent currents of the integral equation kernel are represented in terms of two sets of entire domain basis functions. These functions synthesize on one hand the resonant behavior of slots, microstrips or...

Problem-Matched Basis Functions for Microstrip Coupled Slot Antennas based on Transmission Line Greens Functions

A general algorithm for the analysis of microstrip coupled leaky wave slot antennas was discussed. The method was based on the construction of physically appealing entire domain Methods of Moments (MoM) basis function that allowed a consistent reduction of the number of unknowns and of total computation time. The basis function obtained were...

Problem-Matched Basis Functions for Microstrip Coupled Slot Arrays based on Transmission Line Green+s Functions (TLGF)

A method is proposed for the analysis of arrays of linear printed antennas. After the formulation of pertinent set of integral equations, the appropriate equivalent currents of the Method of Moments are represented in terms of two sets of entire domain basis functions. These functions synthesize on one side the resonant behavior of the slot,...

Optimal choice of the E.M. expansion for arbitrary shaped aperture/patch FSSs in planar phased arrays

In this paper, we present the analysis of frequency selective surfaces (FSS), which comprise periodic arrays of patches or apertures in conducting screens, by means of the multimode equivalent network (MEN) approach. The unknown quantities are expanded in terms of piecewise sinusoidal/linear expanding functions or in terms of full domain basis...

Phased arrays of compact waveguide radiators and frequency selective surfaces: A multi-mode equivalent network approach

The current trend for radar array antennas requires increased integration, as well as large bandwidth, for multifunction systems, and frequency/angular selectivity properties for structural integration on military platforms, like ships and aircrafts, with low radar cross section (RCS). We have presented a review of the potentialities offered by...

A closely spaced waveguide phased array integrated with a frequency selective surface. Modeling and design

In this paper the mathematical formulation for patch FSS integrated with a waveguide array has been presented. This formulation has been implemented in a tool that is able to analyze various configurations of FSS integrated antennas, both screen or patch based, having arbitrary layout and element shape and different periodicity for the FSSs and...