Description: Electrical Engineering/Antennas and Propagation Microstrip Antennas The Analysis and Design of Microstrip Antennas and Arrays Microstrip Antennas contains valuable new information on antenna design and an excellent introduction to the work done in the microstrip antenna area over the past 20 years. The articles are well–chosen and (are) complete with practical design information that is very useful for the working engineer. Stuart Long, University of Houston The editors have done an outstanding job in assembling this updated reprint book. It is a welcome addition to the list of books on microstrip antennas. There is no doubt that it will be a valuable source of information for graduate students, engineers and researchers the original articles are written lucidly and are very informative, and the reprint articles are well chosen. Kai Fong Lee, The University of Toledo Complete with an up–to–date tutorial overview of the field and substantial new, introductory material for each topic, Microstrip Antennas combines in one source a selection of today’s most significant and useful articles on microstrip and antenna design. Eminent experts David M. Pozar and Daniel H. Schaubert guide you through:

Microstrip Antennas The Analysis And Design Of Microstrip Antennas And Arrays

The simultaneous improvement in radiation and scattering performance of an antenna is normally considered as contradictory. In this paper, wideband gain enhancement and radar cross section (RCS) reduction of Fabry–Perot (FP) resonator antenna are both achieved by using chessboard arranged metamaterial superstrate (CAMS). The CAMS is formed by two kinds of frequency-selective surfaces. The upper surface of CAMS is designed to reduce RCS based on the phase cancellation principle, and the bottom surface is used to enhance antenna gain on the basis of FP resonator cavity theory. Both simulation and measured results indicate that compared with primary antenna, the gain of the proposed FP resonator antenna is enhanced by 4.9 dB at 10.8 GHz and the 3 dB gain bandwidth is from 9.4 to 11.1 GHz (16.58%). Meanwhile, the RCS of the proposed FP resonator antenna is reduced from 8 to 18 GHz, with peak reduction of 39.4 dB. The 10 dB RCS reduction is obtained almost from 9.6 to 16.9 GHz (55.09%) for arbitrary polarizations. Moreover, the in-band RCS is greatly reduced, owing to the combined effect of CAMS and FP resonator cavity.

Wideband Gain Enhancement and RCS Reduction of Fabry–Perot Resonator Antenna With Chessboard Arranged Metamaterial Superstrate

PART I: THEORIES OF BRAIN FUNCTION PART II: SENSORY SYSTEMS PART III: MOTOR FUNCTIONS PART IV: SLEEP AND FUNCTION PART V: INTELLECT AND MEMORY PART VI: SPEECH AND CEREBRAL DOMINANCE PART VII: TREATMENTS AND THERAPIES EPILOGUE APPENDIX: DATES OF BIRTH AND DEATH INDEX

Book reviews-origins of neuroscience. A history of explorations into brain function

The process of ensuring the security of monitored objects and material goods requires access to the information from sensors located in different points of monitoring and data acquisition systems. Therefore, they are becoming widely used in the transport services where they are needed for the administration of car fleet or the visualization of selected functions of transport processes. In each of these applications, the reliability and quality of the processes of supervision and monitoring is an important issue. Unfortunately, transmission of data from multiple video sensors may lead to degradation of video quality and reliability of identification. The paper presents a study of selected QoS (Quality of Services) supporting mechanisms and components elaborated for provision of reliable video monitoring services. The results of research have been presented as well which show the efficiency of the developed mechanisms in the process of reliable identification of objects in the transport system.

Selected Issues of Reliable Identification of Object in Transport Systems Using Video Monitoring Services

Multiband, frequency reconfigurable, and metamaterial antennas design techniques: Present and future research directions

Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency.

https://www.mdpi.com/2079-9292/10/1/1/pdf

Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

The article concerns problems connected with electromagnetic compatibility and compromising emanation, i.e., information security. In the article channels of electromagnetic information permeability have been de-scribed and then there has been the focus on laser print- ers for which forcing signals used during measurements of compromising emanation have been presented and measurement results of compromising emanation deriving from laser printer have been described. 1. INTRODUCTION Information security against electromagnetic permeability of devices and electromagnetic systems (IT) is of great importance. This problem increases with a higher and higher use of ICT devices for processing and transmitting information which should not fall into the wrong hands. It results from the fact that each electronic device is the source of undesirable (secondary) emission of elec- tromagnetic energy induced in surrounding space and in all close conductors and metal structures. When signals of undesirable emission are correlated with unclassifled information, they can be used for reconstructing that information by intelligence services. The phenomenon of such undesirable emission is called compromising emanation and its use by intelligence-penetration or electromagnetic inflltration. Undertakings which aim is to hinder system recognition on the basis of compromising emanation are called information protection against electromagnetic penetration or emission safety. Electromagnetic emissions with the feature of compromising emanation can arise at any stage of processing of encoded information in the form of electric current courses. There is also no pos- sibility to conduct tests of the source itself and the channel of information permeability. However such tests can be conducted in laboratory conditions in which examined devices are introduced into operation mode allowing to learn their inflltration susceptibility. In this article an example of such experiments has been presented. It seems that most suitable for illustrating the issue of electro- magnetic information permeability are devices or their components which process information in serial way and the rule of encoding is uncomplicated and well-known.

Measurement and Analysis of Compromising Emanation for Laser Printer

The article concerns the issue of narrow-banding of microstrip antennas. In the article methods of increasing operation bandwidth of microstrip antennas have been presented and examples of the structure of microstrip antennas with signiflcant working band have been shown. Results obtained during simulation and design of antennas have been conflrmed through the measuring way.

Wideband Microstrip Antenna

In the article a structure of multilayer microstrip antenna operating at frequencies 2.4GHz and 5.8GHz have been presented. The antenna structure consists of three dielectric layers and two radiant elements; it is supplied by electromagnetic coupling. Moreover problems occurring in multilayer dual-frequency structures have been discussed in the article.

Dual Band Microstrip Antenna

The reflection and absorption properties of powdered nanocrystalline FeSiBCuNb (“Finemet”) alloy at microwaves have been presented. To visualize the shielding ability of this material, the complex permittivity and permeability of pulverized Finemet in the frequency range from 0.2 to 10 GHz have been studied. To measure the permittivity and permeability of powdered Finemet, the modification of the Nicolson, Ross, and Weir method was presented. The modification of this method was mainly based on the unwrapping technique of the measured S-parameter phases. The investigation of permittivity and permeability was realized for pure powders. Four groups of powders with different particle sizes below 200 μm have been investigated. To assess the shielding effectiveness of the nanocrystalline Finemet, two attempts were analyzed. The investigation of the reflection loss of material layer with metal sheet attached to the backside as a reflector was investigated. On the other hand, the reflection and absorption factors of 3-mm-thick layer in free space were additionally analyzed. The obtained results show that the pulverized nanocrystalline Finemet alloy with particle size below 25 μm possesses good absorption properties and, for such particles, the absorption factor is significantly higher than the reflection factor.

Rafal Przesmycki

Papers

Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

Measurement and Analysis of Compromising Emanation for Laser Printer

Wideband Microstrip Antenna

Dual Band Microstrip Antenna

The Nanocrystalline FeSiBCuNb Finemet Absorption Properties at Microwaves