BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Prague BEGIN:DAYLIGHT DTSTART:20240331T030000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST END:DAYLIGHT BEGIN:STANDARD DTSTART:20231029T020000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20231117T120810Z UID:3B9A90AD-04F6-4E4F-8A0F-4BD50E4E2B05 DTSTART;TZID=Europe/Prague:20231115T090000 DTEND;TZID=Europe/Prague:20231115T170000 DESCRIPTION:57th seminar for microwave technology enthusiasts.\n\nTake adva ntage of this exceptional opportunity to meet with colleagues working in t he field\, establish\, renew\, or deepen personal or professional contacts . We look forward to meeting you and cordially invite you to the seminar w ith an accompanying exhibition of products from companies operating in the field of high-frequency and microwave technology.\n\nAgenda: \nThe introd uctory lecture presents the development of 3D radar with electronically st eerable antenna arrays. The presentation does not limit itself to microwav e design aspects but aims to illustrate the development of the entire life cycle context (Systems Engineering)\, the top-down design approach\, and the need to consider aspects from various engineering disciplines\, such a s the integration of microwave design with digital signal processing (digi tal beamformer).\n\nReconfigurable antennas find applications in surveilla nce systems for target detection\, protection of specific areas\, communic ation for automatic participant detection\, and optimization of individual connections. Attention is given to antennas whose radiation pattern maxim a direction is electronically controlled by changing the DC voltage that c ontrols the varactor capacitances. Another way to control the direction of radiation pattern maxima is to change the amplitudes of the power signals applied to individual ports.\n\nThe software COMSOL Multiphysics is tradi tionally based on the finite element method (FEM). To cover a wide range o f simulations\, it uses other numerical methods and can combine them in so -called hybrid models. This modeling approach is key to capturing complex electromagnetic behavior and interactions with different materials and str uctures. The software can also include other physical phenomena in a singl e simulation\, such as heat transfer\, fluid flow\, or structural deformat ions. The interconnection of different physical domains and a comprehensiv e analysis of their interactions bring new perspectives and enable more ac curate simulations in a real environment. The microwave heating and the in fluence of structural deformations on system functionality are discussed i n detail.\n\nAir traffic control relies mainly on secondary radars and mul tilateration when detecting aircraft operating at frequencies of 1030 and 1090 MHz. These sensors query aircraft\, or more generally\, entities equi pped with transponders\, and wait for responses to their queries. In case of a high volume of queries\, the transponder may become overloaded and st op responding altogether. In such cases\, targets can only be detected by primary radar\, but its use is decreasing in civilian air traffic control. The presentation will describe frequency users and the current state of f requency congestion. Furthermore\, it will present the consequences of tra nsponder overloads and recent specific events in interrogations.\n\nEstima ting the number of people in a room using Wi-Fi leverages communication be tween mobile devices and infrastructure in the form of Wi-Fi packet probin g requests. Data is captured using sniffers based on ESP32 microcontroller boards and then processed using the Python language. This allows for esti mating the total number of people (or mobile devices) in a building.\n\nEl ectroforming is a classic additive manufacturing technology for creating c opper microwave waveguides\, waveguide transitions\, filters\, or antennas . It still plays a significant role in the production of precision microwa ve components. A completely new approach offers the combination of 3D prin ting of polymers or ceramics and electrochemical plating in the form of th in (in the order of 0.01 mm) or thick (in the order of 0.1 mm) copper or n ickel layers.\n\nThe introductory lecture for the discussion evening deals with the course of the first Czech attempt at a solo circumnavigation of the world without stopping and assistance in 2011/2012\, associated with b reaking the then-world record on a self-built 8.5-meter sailboat named Sin ga. Attention will be given to the boat's equipment with electronics for e nsuring the safety of the voyage within the international maritime distres s and safety GMDSS\, navigation\, vessel control\, and for securing essent ial life needs. The communication equipment for radio voice and data commu nication via satellite systems Inmarsat will be presented in more detail.\ n\nNovotného lávka 1\, Prague\, Czech Republic\, Czech Republic LOCATION:Novotného lávka 1\, Prague\, Czech Republic\, Czech Republic ORGANIZER:hazdrap@fel.cvut.cz SEQUENCE:21 SUMMARY:Regular meeting of microwave technology enthusiasts URL;VALUE=URI:https://events.vtools.ieee.org/m/382796 X-ALT-DESC:Description: <br /><p>57th seminar for microwave technology enth usiasts.</p>\n<p>Take advantage of this exceptional opportunity to meet wi th colleagues working in the field\, establish\, renew\, or deepen persona l or professional contacts. We look forward to meeting you and cordially i nvite you to the seminar with an accompanying exhibition of products from companies operating in the field of high-frequency and microwave technolog y.</p><br /><br />Agenda: <br /><p>The introductory lecture presents the d evelopment of 3D radar with electronically steerable antenna arrays. The p resentation does not limit itself to microwave design aspects but aims to illustrate the development of the entire life cycle context (Systems Engin eering)\, the top-down design approach\, and the need to consider aspects from various engineering disciplines\, such as the integration of microwav e design with digital signal processing (digital beamformer).</p>\n<p>Reco nfigurable antennas find applications in surveillance systems for target d etection\, protection of specific areas\, communication for automatic part icipant detection\, and optimization of individual connections. Attention is given to antennas whose radiation pattern maxima direction is electroni cally controlled by changing the DC voltage that controls the varactor cap acitances. Another way to control the direction of radiation pattern maxim a is to change the amplitudes of the power signals applied to individual p orts.</p>\n<p>The software COMSOL Multiphysics is traditionally based on t he finite element method (FEM). To cover a wide range of simulations\, it uses other numerical methods and can combine them in so-called hybrid mode ls. This modeling approach is key to capturing complex electromagnetic beh avior and interactions with different materials and structures. The softwa re can also include other physical phenomena in a single simulation\, such as heat transfer\, fluid flow\, or structural deformations. The interconn ection of different physical domains and a comprehensive analysis of their interactions bring new perspectives and enable more accurate simulations in a real environment. The microwave heating and the influence of structur al deformations on system functionality are discussed in detail.</p>\n<p>A ir traffic control relies mainly on secondary radars and multilateration w hen detecting aircraft operating at frequencies of 1030 and 1090 MHz. Thes e sensors query aircraft\, or more generally\, entities equipped with tran sponders\, and wait for responses to their queries. In case of a high volu me of queries\, the transponder may become overloaded and stop responding altogether. In such cases\, targets can only be detected by primary radar\ , but its use is decreasing in civilian air traffic control. The presentat ion will describe frequency users and the current state of frequency conge stion. Furthermore\, it will present the consequences of transponder overl oads and recent specific events in interrogations.</p>\n<p>Estimating the number of people in a room using Wi-Fi leverages communication between mob ile devices and infrastructure in the form of Wi-Fi packet probing request s. Data is captured using sniffers based on ESP32 microcontroller boards a nd then processed using the Python language. This allows for estimating th e total number of people (or mobile devices) in a building.</p>\n<p>Electr oforming is a classic additive manufacturing technology for creating coppe r microwave waveguides\, waveguide transitions\, filters\, or antennas. It still plays a significant role in the production of precision microwave c omponents. A completely new approach offers the combination of 3D printing of polymers or ceramics and electrochemical plating in the form of thin ( in the order of 0.01 mm) or thick (in the order of 0.1 mm) copper or nicke l layers.</p>\n<p>The introductory lecture for the discussion evening deal s with the course of the first Czech attempt at a solo circumnavigation of the world without stopping and assistance in 2011/2012\, associated with breaking the then-world record on a self-built 8.5-meter sailboat named Si nga. Attention will be given to the boat's equipment with electronics for ensuring the safety of the voyage within the international maritime distre ss and safety GMDSS\, navigation\, vessel control\, and for securing essen tial life needs. The communication equipment for radio voice and data comm unication via satellite systems Inmarsat will be presented in more detail. </p> END:VEVENT END:VCALENDAR