Here, we propose a fully metallic implementation of Luneburg lens operating at Ka-band with potential use for 5G communications. The is implemented parallel plate that loaded glide-symmetric holes. These holes are employed to produce the required equivalent refractive index profile Lune-burg lens. Glide symmetry and inner pins increase index. fed rectangular waveguides designed match height plate, it ended flare minimize reflections.

In this letter, a novel cost-effective flange is proposed to prevent the leakage created by undesired air gaps between flanges of two mating waveguides. The cause an gap can be surface curvature, dirt, human mistakes, or misalignment. Our proposal consists machining glide-symmetric holes around waveguide aperture on flanges. Due glide symmetry properties, identical pattern possible at both sides, thus becoming when they are mated together.

This paper shows that microstrip filters perform like textbook examples when packaged with perfect magnetic conductor (PMC). A PMC is made as a pin surface or lid of nails, and this used to package parallel coupled line bandpass filter. Our measurements confirm plate, cavity modes, radiation are suppressed. also includes study the reasons for frequency shift between ideal case realized case.

Antennas for future communication systems are required to be highly directive and steerable compensate the high path loss in millimeter-wave band. In this work, we propose a linear array of modulated geodesic Luneburg lens (the so-called water drop lens) antennas operating at 56–62 GHz. The antenna features 2-D beam scanning with low structural complexity. lenses fully metallic implemented parallel plate waveguides (PPWs), meaning that they efficient. Each is fed 13 rectangular surrounded by...

The paper describes the design methodology, experimental validation, and practical considerations of two millimeter-wave wideband vertical transitions from gap waveguide versions (inverted microstrip waveguide, packaged by using waveguide) to standard WR-15 rectangular waveguide. results show S11 smaller than -10 dB over relative bandwidths larger 25% 26.6% when Rogers RO3003 RO4003 materials are used, respectively. transition line a lid pins shows measured return loss better 15 13.8%...

This letter presents an end-coupled bandpass filter (BPF) based on the recently introduced inverted microstrip gap waveguide technology. The is advantageous for millimeter wave applications because of its low-loss, self-packaging characteristics, and cost-effectiveness. A fourth order Chebyshev-type BPF designed to provide a 2 GHz bandwidth at 60 center frequency. fabricated prototype embedded within 10 cm waveguide, containing two back-to-back transitions rectangular exhibits insertion loss...

We investigate the use of a single leaky wave antenna (LWA) for amplitude-monopulse direction finding when compared to more conventional two tilted antennas. Thanks inherent bidirectional feeding and scanning behavior LWAs, it is demonstrated compact planar design while offering similar functionality in far field. The frequency beam squinting effect suffered by LWA, its capability create frequency-scanned monopulse patterns, are also analyzed; moreover, smaller size mitigates near-field...

Quasi-optical beamformers provide attractive properties for antenna applications at millimetre-wave frequencies. Antennas implemented with these have demonstrated wide angle switching of directive beams, making them suitable as base station antennas future communication networks. For applications, it is essential to ensure a high beam crossover gain robust service end users within the steering range. Here, we propose geodesic generalized Luneburg lens operating from 57 67 GHz that provides...

This paper describes the design and realization of a transition from microstrip line to ridge gap waveguide operating between 95 115 GHz. The study includes simulations, measurements, Monte Carlo analysis assembly tolerances. purpose this tolerance is identify most critical misalignments that affect circuit performance provide guidelines about requirements for proposed design.

Here, we propose a low-profile polarizing technique integrated in parallel plate waveguide (PPW) configuration, compatible with fully metallic geodesic lens antennas. The shape of the antenna is chosen to resemble operation Luneburg lens. fed 11 ports 10° separation producing switchable beams an angular range <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pm \mathrm{50}^{\circ }$...

We propose the application of frequency-scanning leaky-wave antennas to improve performance separate-channel fingerprinting techniques used for indoor localization. This paper reports initial evaluations conducted with microstrip (LWA) and BLE (Bluetooth Low Energy) beacons. The LWA is designed direct three advertising channels towards different angular sectors. As a result, it demonstrated an increase spatial diversity radiomaps. significantly improves location estimation accuracy by 30%,...

5G is currently being rolled-out in many countries and nationwide networks with successive provisioning of new communication capabilities services will keep the industry busy for years. However, academia have initiated research on fundamentals next generation wireless (6G). In this paper, we discuss challenges to realize flexible cost-effective antenna systems these systems. The focus be system requirements from an industrial view particularly millimeter wave (mm-wave) sub-THz frequency range.

The current worldwide energy and economical crisis triggers the need of more sustainable technological solutions to implement energy-efficient next generation communication systems, which should also be commercially viable costeffective.Moreover, future terrestrial satellite communications will bring a wide range use cases, services environments with very different requirements specifications fulfill in order generate smart digital fully connected society.Designing new antennas for each...

In this article, we propose an innovative concept to realize flexible and cost-effective array antenna systems for next generation communication systems. The idea is tailor the performance of different use case scenarios by applying a customized dielectric lens placed in front array. By combining with array, can improve certain properties system adapt it unique site locations requirements. Moreover, may also act as radome, providing mechanical protection from environmental conditions. This...

A transition from Microstrip to Ridge Gap Waveguide (RGW) has been studied and numerically analyzed in terms of S parameters. The RGW technology shows potential be used up THz frequencies. Therefore, good transitions are needed order make possible the measurements components at frequencies above 100 GHz.

A transition from Coplanar Waveguide (CPW) via capacitive coupling in order to provide feeding the so-called Ridge Gap (RGW) has been investigated. The main objective of this work is find a way facilitate integration active electronics with gap waveguide structure and also do measurements components made technology working around 100 GHz. design simulation S parameters for designed topology presented.

Abstract It is demonstrated that combining phased array antennas with dielectric lenses constitutes a suitable solution to increase the energy efficiency in next‐generation communication systems. A lens designed gain of an antenna working 3GPP n257 band (26.5–29.5 GHz). The simulated results demonstrate increases between 0.4 and 1.3 dB large scanning range from 0° 60° at 28 GHz; meaning output RF power can be decreased by up 26% for same equivalent isotropic radiated required base station.

A Ka-band 2D flat-profiled Luneburg lens antenna implemented with a glide-symmetric holey structure is presented. The required refractive index for the design has been investigated via an analysis of hole depth and gap between two metallic layers constituting lens. final unit cell described applied to create complete metasurface showing that plane wave obtained when feeding at opposite arbitrary point discrete source.

This paper presents the design, implementation and experimental validation of a bandpass filter for high-data rate point-to-point link applications at E-band. The proposed design is developed in multilayer waveguide (MLW) technology, where an air-filled transmission line formed by stacking several unconnected thin metal plates. Our MLW designed combining low-pass high-pass filtering structures, consists 19 separate layers. An array glide-symmetric holes, which act as electromagnetic band gap...