黑料不打烊

艩iame baigiamajame darbe pristatomas i拧manusis p臈s膷i懦j懦 per臈jos mygtukas, sukurtas naudojant ESP32. 漠renginys aktyvuojamas prisililietimu ir garsiniu signalu ir OLED atvaizduoja atgalin寞 skai膷iavim膮, vykdo vietin寞 laukimo ir 臈jimo cikl膮, per 鈥濿i-Fi鈥� rodo vie拧ojo transporto atvykimo laikus bei matuoja CO鈧�, temperat奴r膮 ir dr臈gm臋. Internetin臈 valdymo platforma saugo duomenis, skai膷iuoja paspaudimus ir siun膷ia 寞renginiui prane拧imus, numato galimub臋 keisti pna拧imo kalb膮 bei atvaizduoja b奴senos pakeitimus. Darbo metu pagamintas prototipas atitinkantis visus reikalavimus, stabiliai veikia, nesant interneto ry拧iui, veikia kaip 寞prastas mygtukas.

This thesis presents a smart pedestrian push-button built on an ESP32. The device confirms a touch with a beep and an OLED countdown, runs a local wait and walk cycle, shows public transport arrivals over Wi-Fi, and measures CO2, temperature and humidity. A web dashboard stores the data, counts presses, and sends the device messages, languages and state changes. The prototype met all requirements, ran stably for one hour, and kept working as a basic button when offline.

Baigiamajame bakalauro darbe suprojektuotas d奴m懦 detektorius ir aplinkos steb臈senos 寞renginys, skirtas steb臈ti kambario oro kokyb臋 ir u啪fiksavus gaisro pavoj懦, prane拧ti apie galim膮 gaisro pavoj懦 lokaliai, 寞 i拧man懦j寞 寞rengin寞 ir internetin寞 puslap寞. 漠rengin寞 sudaro oro kokyb臈s jutiklis, temperat奴ros ir dr臈gm臈s jutiklis, 2 vnt., 寞tampos keitikli懦, li膷io polimer懦 baterija, 寞kroviklis, garsin臈 sirena, 拧viesos diodas, mikrovaldiklis ESP32-S3-WROOM-1. I拧analizavus analogi拧kus 寞renginius, sudaryta i拧manaus d奴m懦 detektoriaus strukt奴rin臈 schema ir principin臈 elektrin臈 schema. Suprojektuota spausdintin臈 plok拧t臈. Sudaryta mikrovaldiklio ir internetinio puslapio algoritm懦 schemos, para拧ytas programos kodas. Atliktas 寞renginio testavimas ir darbo rezultat懦 apibendrinimas. Darb膮 sudaro 8 dalys: 寞vadas ir u啪duoties analiz臈, analogi拧k懦 寞rengini懦 ap啪valga, 寞renginio modelio k奴rimas, 寞renginio projektavimas, 寞renginio testavimas, rezultat懦 apibendrinimas, literat奴ros s膮ra拧as, priedai. Darbo apimtis - 67 psl. teksto be pried懦, 30 iliustracij懦, 1 lentel臈, 28 literat奴ros 拧altini懦, 10 pried懦.

This bachelor鈥檚 thesis presents the design of a smoke detector and environmental monitoring device intended to monitor indoor air quality and, upon detecting a fire hazard, alert users locally, via a smart device, and through a website. The device consists of an air quality sensor, two temperature and humidity sensors, voltage converters, a lithium-polymer battery, a charger, an audible siren, an LED, and an ESP32-S3-WROOM-1 microcontroller. After analyzing similar devices, a block diagram and a schematic diagram of the smart smoke detector were created. A printed circuit board was designed. Algorithm diagrams for the microcontroller and the website were created, and the program code was written. The device was tested, and the results were summarized. The thesis consists of 8 sections: introduction and task analysis, review of similar devices, creation of the device model, device design, device testing, summary of results, bibliography, and appendices. The thesis comprises 67 pages of text excluding appendices, 30 illustrations, 1 table, 28 references, and 10 appendices.

Baigiamajame bakalauro darbe suprojektuota mikrobangini懦 impuls懦 ne拧lio da啪nio nustatymo sistema, skirta elektromagnetin臈s spinduliuot臈s impulsini懦 signal懦 aptikimui ir j懦 da啪ni懦 juostos nustatymui. Darbo metu i拧analizuoti spektro analizavimo metodai, palyginti superheterodininio ir lygiagre膷i懦 filtr懦 metod懦 veikimo principai, 寞vertintas j懦 tinkamumas greitam trump懦 impulsini懦 signal懦 aptikimui. Suprojektuota daugiakanal臈 filtravimo sistema, sudaryta i拧 sutelkt懦j懦 parametr懦 ir mikrojuostelini懦 filtr懦, apimanti 100 MHz鈥�12,8 GHz da啪ni懦 diapazon膮. Sukurta impulsini懦 signal懦 amplitud臈s aptikimo ir duomen懦 apdorojimo sistema, paremta STM32 mikrovaldikliu, taip pat operatoriaus vartotojo s膮saja su LCD ekranu. Atliktas sistemos komponent懦 modeliavimas, filtr懦 projektavimas, spausdintini懦 plok拧膷i懦 k奴rimas, eksperimentiniai tyrimai ir gaut懦 rezultat懦 analiz臈. Tyrimo metu 寞vertintas sistemos jautrumas, veikimo sparta ir tinkamumas radar懦 bei trikd啪i懦 signal懦 aptikimo u啪daviniams. Darb膮 sudaro 6 dalys: 寞vadas ir literat奴ros ap啪valga; sistemos komponent懦 tyrimas ir modeliavimas; sistemos projektavimas, gamyba ir eksperimentinis tyrimas; modeliavimo ir eksperimentini懦 tyrim懦 analiz臈 bei i拧vados; darbo t臋stinumo gair臈s; priedai. Darbo apimtis 鈥� 62 p. teksto be pried懦, 34 iliustr., 6 lent., 15 bibliografiniai 拧altiniai

This bachelor鈥檚 thesis presents the design of a microwave pulse carrier frequency detection system intended for the detection of impulsive electromagnetic radiation signals and determination of their frequency band. During the research, spectrum analysis methods were examined, and the operating principles of superheterodyne and parallel filter methods were compared in order to evaluate their suitability for rapid detection of short pulse signals. A multichannel filtering system consisting of lumped-element and microstrip filters was designed, covering the frequency range from 100 MHz to 12.8 GHz. A pulse signal amplitude detection and data processing system based on an STM32 microcontroller was developed, together with a user interface featuring an LCD display. The work includes component modeling, filter design, printed circuit board development, experimental testing, and analysis of the obtained results. The study evaluates system sensitivity, operating speed, and suitability for radar and jamming signal detection applications. The thesis consists of 6 parts: introduction and literature review; research and modeling of system components; system design, manufacturing, and experimental investigation; analysis of modeling and experimental results with conclusions; future development guidelines; appendices. Thesis scope: 62 pages of text excluding appendices, 34 figures, 6 tables, 15 bibliographic sources.

Baigiamajame magistro darbe nagrin臈jamos Chagas ligos aptikimo i拧 elektrokardiogramos (EKG) signal懦, taikant signal懦 apdorojimo ir ma拧ininio mokymosi metodus, galimyb臈s. Darbo tikslas 鈥� i拧tirti signal懦 apdorojimo algoritmus, skirtus Chagas ligai i拧 elektrokardiogramos duomen懦, aptikti ir 寞vertinti j懦 efektyvum膮. Darbo metu atlikta mokslin臈s literat奴ros apie Chagas ligos diagnostik膮 bei EKG signal懦 analiz臈s metodus analiz臈. I拧nagrin臈ti ir parinkti tinkami duomen懦 rinkiniai, pagr寞sti PhysioNet platformos duomenimis. Taikyti signal懦 apdorojimo metodai, 寞skaitant filtravim膮, normalizavim膮 bei po啪ymi懦 i拧skyrim膮 i拧 EKG signal懦. I拧skirti statistiniai ir da啪niniai po啪ymiai, kurie panaudoti klasifikavimo modeli懦 mokymui. Eksperimentin臈je dalyje pritaikyti skirtingi klasifikavimo algoritmai 鈥� logistin臈 regresija ir atsitiktini懦 mi拧k懦 (Random Forest) modelis. Modeli懦 veikimas 寞vertintas naudojant tikslumo (accuracy), ROC kreiv臈s ir AUC metrikas bei klaid懦 matricas. Gauti rezultatai parod臈, kad abu modeliai geba efektyviai klasifikuoti signalus, o atsitiktini懦 mi拧k懦 modelis pasi啪ymi geresniu veikimu ir didesniu stabilumu. Darbo rezultatai patvirtina, kad EKG signal懦 analiz臈 kartu su ma拧ininio mokymosi metodais yra perspektyvi kryptis kuriant automatizuotas Chagas ligos diagnostikos sistemas. Darbo apimtis 鈥� 63 p. teksto, be pried懦, 20 paveiksl懦, 8 lentel臈s, 25 bibliografiniai 拧altiniai. Atskirai pridedami darbo priedai.

This Master's thesis investigates the detection of Chagas disease using electrocardiogram (ECG) signals by applying signal processing and machine learning methods. The aim of the study is to analyze signal processing algorithms for detecting Chagas disease from ECG data and to evaluate their effectiveness. A review of scientific literature on Chagas disease diagnostics and ECG signal analysis methods was conducted. Appropriate datasets based on PhysioNet platform data were analyzed and selected. Signal processing techniques, including filtering, normalization, and feature extraction from ECG signals, were applied. Statistical and frequency-domain features were extracted and used for training classification models. In the experimental part, different classification algorithms were applied, including Logistic Regression and the Random Forest model. Model performance was evaluated using accuracy, ROC curves, AUC metrics, and confusion matrices. The obtained results showed that both models are capable of effectively classifying ECG signals, while the Random Forest model demonstrated better performance and greater stability. The results of the study confirm that ECG signal analysis combined with machine learning methods is a promising approach for developing automated systems for Chagas disease detection. Scope of the thesis 鈥� 63 pages of text (excluding appendices), 20 figures, 8 tables, and 25 bibliographic sources. Appendices are provided separately.

Darbe nagrin臈jama auk拧to tikslumo belaid臈s laiko sinchronizacijos problema paskirstytose automatini懦 matavim懦 sistemose, kurios aktualumas did臈ja pl臈tojant i拧maniuosius tinklus, pramonin寞 daikt懦 internet膮 ir realiojo laiko matavimo sistemas. Atlikta mokslin臈s literat奴ros ir analogi拧k懦 rinkoje esan膷i懦 sprendim懦 analiz臈, 寞vertinti belaid啪io ry拧io protokolai bei j懦 tinkamumas tiksliai laiko sinchronizacijai. Sukurtas ir eksperimenti拧kai i拧tirtas ultrapla膷iajuos膷iu (UWB) radijo technologija pagr寞stas laiko sinchronizavimo sprendimas, kuriame taktini懦 generatori懦 poslinkiui ir slinkiui kompensuoti taikomas tiesin臈s regresijos modelis. Eksperimentini懦 duomen懦 analizei naudoti vidutin臈s paklaidos, standartinio nuokrypio ir vidutin臈s kvadratin臈s paklaidos metodai. Tyrim懦 rezultatai parod臈, kad sukurta sistema u啪tikrina stabil懦 mikrosekund啪i懦 lygio sinchronizavimo tikslum膮 skirtingais atstumais tarp 寞rengini懦. Nustatyta, kad UWB technologija yra tinkama auk拧to tikslumo bevieliam laiko sinchronizavimui automatiniuose matavimuose. Baigiam膮j寞 magistro darb膮 sudaro 45 puslapiai, 13 formuli懦, 14 paveiksl懦 ir 2 lentel臈s. Baigiamajame magistro darbe cituota 17 literat奴ros 拧altini懦.

This thesis investigates the problem of high-precision wireless time synchronization in distributed automated measurement systems, whose importance is increasing with the development of smart grids, the Industrial Internet of Things (IIoT), and real-time measurement applications. A review of scientific literature and an analysis of comparable solutions available on the market were conducted, and wireless communication protocols were evaluated in terms of their suitability for precise time synchronization. A time synchronization solution based on Ultra-Wideband (UWB) radio technology was developed and experimentally evaluated. The solution employs a linear regression model to compensate for clock offset and clock drift. Experimental data were analyzed using mean error, standard deviation, and root mean square error (RMSE) metrics. The results demonstrated that the developed system provides stable synchronization accuracy at the microsecond level over various distances between devices. It was concluded that UWB technology is suitable for high-precision wireless time synchronization in automated measurement systems. The Final Masters鈥檚 Work has 45 pages, 13 formulas, 14 figures, and 2 tables. The Final Masters鈥檚 Work cited 17 literature sources.

Baigiamajame magistro darbe nagrin臈jamas baterinio elektros energijos kaupiklio taikymas elektros suvartojimo ka拧tams optimizuoti. Sukurtas saul臈s j臈gain臈s ir baterinio kaupiklio sistemos darbo optimizavimo matematinis modelis. Tiriamas optimizavimo modelio veikimas skirtinguose energijos vartojimo scenarijuose paros laiko horizonte, atliekama metini懦 rezultat懦 analiz臈 ir vertinama baterijos parametr懦 寞taka. Ap啪velgta baterini懦 elektros energijos kaupikli懦 sistem懦 (BEEKS) darbo optimizavimo mokslin臈 literat奴ra, aptarti optimizavimo u啪davini懦 formulavimo ir sprendimo teoriniai aspektai, i拧nagrin臈ti BEEKS taikymo atvejai ir nustatyti svarbiausi modelio rezultat懦 vertinimo kriterijai. Modelis 寞gyvendintas 鈥濸ython" programavimo kalba, o optimizavimo u啪davinys sprend啪iamas taikant mi拧ri懦j懦 sveik懦j懦 skai膷i懦 tiesinio programavimo (MILP) metod膮. Apra拧oma daugiakriter臈 tikslo funkcija, kuria maksimizuojamas kain懦 arbitra啪o pelnas ir saul臈s j臈gain臈s pagamintos energijos suvartojimas. Empirinio tyrimo metu nustatyta, kad santykin臋 ekonomin臋 naud膮 reik拧mingiausiai lemia baterijos C koeficientas. Darbo apimtis 鈥� 66 p. teksto be pried懦, 35 iliustr., 4 lent., 45 bibliografiniai 拧altiniai. Atskirai pridedami darbo priedai.

This master鈥檚 thesis investigates the application of a battery energy storage system for optimising electricity consumption costs. A mathematical model is developed to optimise the combined operation of a solar power plant and a battery energy storage system (BESS). The model behaviour is examined across multiple energy consumption scenarios on a daily time horizon, the annual results are analysed and battery parameter influence is evaluated. The thesis reviews the literature on BESS optimisation, discusses the theoretical aspects of optimisation problem formulation and solution, examines BESS use cases and identifies the main criteria for evaluating model outputs. The model is implemented using Python programming language and the optimisation problem is formulated as a mixed integer linear program (MILP) with a multi-objective function that maximises both price arbitrage profit and self-consumption of solar energy. The empirical study shows that relative economic benefit primarily depends on the battery C-rate. Thesis consists of 66 pages of text without appendixes, 35 pictures, 4 tables and 45 bibliographical sources. Appendixes included separately.

艩iame bakalauro darbe pristatomas prototipinio siuntos kokyb臈s steb臈jimo 寞renginio projektavimas ir 寞gyvendinimas. 漠renginys skirtas veikti kaip neprisijung臋s duomen懦 kaupiklis, registruojantis aplinkos s膮lygas ir mechaninius 寞vykius siuntimo metu. Darbas apima komercini懦 ir akademini懦 duomen懦 registravimo sistem懦 ap啪valg膮, funkcini懦 reikalavim懦 apibr臈啪im膮, komponent懦 parinkim膮, schemos projektavim膮, spausdintin臈s plok拧t臈s projektavim膮, programin臈s 寞rangos k奴rim膮, duomen懦 paie拧k膮 ir programin臈s 寞rangos pagrindu veikian膷i膮 duomen懦 vizualizacij膮. Prototipas pagr寞stas ESP32-WROOM-32E mikrovaldiklio moduliu. Temperat奴ra ir santykin臈 dr臈gm臈 matuojamos naudojant HDC2080 jutikl寞, o sm奴giai aptinkami naudojant FXLS8971CF trij懦 a拧i懦 akselerometr膮. 漠renginys maitinamas vieno elemento LiPo baterija ir turi atvirk拧tinio poli拧kumo apsaug膮 bei 3,3 V 寞tampos reguliavim膮. 漠ra拧yti duomenys saugomi ESP32 vidin臈je 鈥瀎lash鈥� atmintyje naudojant 鈥濴ittleFS鈥� fail懦 sistem膮, o po bandymo duomen懦 paie拧ka atliekama per UART s膮saj膮. Sukurta programin臈 寞ranga periodi拧kai 寞ra拧o temperat奴ros ir santykin臈s dr臈gm臈s vertes, aptinka sm奴gius naudodama akselerometro pertraukimo i拧vest寞 ir saugo 寞ra拧us CSV formatu su santykiniais laiko 啪ymomis. Taip pat buvo sukurtas 鈥濸ython鈥� pagrindu sukurtas vizualizavimo 寞rankis, skirtas apdoroti UART duomen懦 i拧klotin臋 ir rodyti temperat奴ros, dr臈gm臈s bei sm奴gi懦 寞vyki懦 寞ra拧us. Laboratorin臈 validacija patvirtino pagrindinius prototipo funkcinius kelius: jutikli懦 aptikim膮 ir konfig奴ravim膮, periodin寞 aplinkos registravim膮, pertraukimais pagr寞st膮 sm奴gi懦 寞vyki懦 registravim膮, nepastovi膮j膮 saugykl膮, UART duomen懦 paie拧k膮 ir papildom膮 apdorojim膮 asmeniniame kompiuteryje.

This bachelor thesis presents the design and implementation of a prototype shipment quality monitoring device. The device is intended to operate as an offline data logger that records environmental conditions and mechanical events during shipment. The work includes a review of commercial and academic data logging systems, definition of functional requirements, component selection, schematic design, printed circuit board design, firmware development, data retrieval, and software-based data visualization. The prototype is based on the ESP32-WROOM-32E microcontroller module. Temperature and relative humidity are measured using the HDC2080 sensor, while shock events are detected using the FXLS8971CF three-axis accelerometer. The device is powered from a single-cell LiPo battery and includes reverse polarity protection and 3.3 V voltage regulation. Recorded data is stored in the internal flash memory of the ESP32 using the LittleFS file system, while post-test data retrieval is performed through the UART interface. The developed firmware periodically records temperature and relative humidity values, detects shock events using the accelerometer interrupt output, and stores records in CSV format with relative timestamps. A Python-based visualization tool was also developed to process the UART data dump and display temperature, humidity, and shock event records. Laboratory validation confirmed the main functional paths of the prototype: sensor detection and configuration, periodic environmental logging, interrupt-based shock event logging, non-volatile storage, UART data retrieval, and post-processing on a personal computer.

艩iame bakalauro darbe pristatomas virtualios i拧manios vaist懦 vartojimo laikymosi mokymo sistemos projektavimas ir 寞gyvendinimas, sukurtas naudojant 鈥濽nity鈥� aplink膮. Darbo tikslas 鈥� sukurti saugi膮 ir interaktyvi膮 aplink膮, kurioje naudotojai gal臈t懦 praktikuoti vaist懦 vartojimo rutin膮 be rizikos, susijusios su tikr懦 vaist懦 naudojimu. Sukurtas prototipas apima vaist懦 vartojimo tvarkara拧膷io konfig奴ravim膮, scenarijais pagr寞st膮 priminim懦 logik膮, naudotojo s膮veik膮, 寞vyki懦 registravim膮 ir integracij膮 su i拧oriniu ne拧iojamu priminim懦 寞renginiu. Naudotojo mazgas suteikia vaizdin寞 ir taktilin寞 gr寞啪tam膮j寞 ry拧寞 per LED lemputes ir vibracin寞 varikl寞 bei leid啪ia naudotojams patvirtinti veiksmus paspaud啪iant mygtuk膮. Sistemoje taip pat 寞diegta slaugytojo / pri啪i奴rin膷io asmens informavimo funkcija, 寞gyvendinta naudojant 鈥濼wilio鈥� SMS persp臈jimus ir 鈥濬irebase鈥� tinklalapio integracij膮, leid啪ian膷i膮 nuotolin寞 寞siki拧im膮. Sukurta mokymo aplinka palaiko kelis su vaist懦 vartojimu susijusius scenarijus, 寞skaitant bandom膮j膮 doz臋, i拧gert膮 doz臋, pav臈luot膮 doz臋, praleist膮 doz臋 ir priminim膮 apie papildym膮. Pirminis naudotoj懦 gr寞啪tamasis ry拧ys parod臈, kad prototipas buvo suprantamas, lengvai naudojamas ir vertinamas kaip naudingas vaist懦 vartojimo laikymosi mokymui. Darbo rezultatai rodo, kad si奴lomas po啪i奴ris yra tinkamas pagrindas tolesniam 寞 mokym膮 orientuot懦 vaist懦 vartojimo laikymosi palaikymo sistem懦 vystymui. 漠gyvendintas prototipas parodo, kaip virtuali simuliacija, i拧orini懦 寞rengini懦 gr寞啪tamasis ry拧ys ir baziniai pri啪i奴rin膷io asmens informavimo mechanizmai gali b奴ti derinami siekiant palaikyti saug懦 ir interaktyv懦 vaist懦 vartojimo laikymosi mokym膮.

This bachelor thesis presents the design and implementation of a virtual smart medication adherence training system developed using the Unity engine. The aim of the work is to create a safe and interactive environment in which users can practise medication-taking routines without the risks associated with the use of real medication. The developed prototype includes medication schedule configuration, scenario based reminder logic, user interaction, event logging, and integration with an external wearable reminder node. The user node provides visual and tactile feedback through LEDs and a vibration motor, and allows users to confirm actions by pressing a push button. The system also includes a caregiver notification function implemented using Twilio SMS alerts and Firebase webpage integration, enabling remote intervention. The developed training environment supports several medication related scenarios, including practice dose, taken dose, late dose, missed dose, and a refill notification. Preliminary user feedback indicated that the prototype was understandable, easy to use, and perceived as useful for supporting medication adherence training. The results of the work suggest that the proposed approach is a feasible basis for the further development of training-oriented medication adherence support systems. The implemented prototype demonstrates how virtual simulation, external hardware feedback, and basic caregiver notification mechanisms can be combined to support safe and interactive medication adherence training.

Baigiamajame bakalauro darbe buvo suprojektuota ir sukonstruota Bluetooth garso kolon臈l臈 su grojamos muzikos LED 拧vies懦 sinchronizacija. 漠renginys susideda i拧 maitinimo 拧altinio, ESP32 ir STM32F405 mikrovaldikli懦, garso gavimo bei apdorojimo sistem懦, vartotojo s膮sajos valdymo mygtuk懦 bei WS2812B 拧viesos diod懦 juostos. Atlikus analogini懦 寞rengini懦 analiz臋, padarytos i拧vados ir sukurta strukt奴rin臈 projektuojamo 寞taiso schema bei principin臈 elektrin臈 schema. Suprojektuota ketursluoksn臈 spausdintin臈 plok拧t臈 ir 寞taiso korpusas. Prie拧 programuojant buvo sudarytas program懦 algoritmas, realizuotas baigtini懦 b奴sen懦 automat懦 principu, ir toliau atlikti mikrovaldikli懦 programavimo bei dviej懦 valdikli懦 s膮veikos k奴rimo darbai. Galiausiai baigiamajame bakalauro darbe atliktas sukonstruoto 寞renginio eksperimentinis testavimas, darbo tolesnio tobulinimo kryp膷i懦 analiz臈 ir darbo rezultat懦 apibendrinimas. Darb膮 sudaro 9 skyriai, tokie kaip 寞vadas, analogini懦 寞rengini懦 analiz臈, strukt奴rin臈s schemos k奴rimas, elektrin臈s principin臈s schemos ir spausdintin臈s plok拧t臈s projektavimas, programos algoritmo ir kodo k奴rimas, eksperimentiniai tyrimai, tolesnio tobulinimo kryptys, rezultat懦 apibendrinimas ir literat奴ros s膮ra拧as. Darbo apimtis 鈥� 64 psl. teksto be pried懦, 47 iliustracijos, 3 lentel臈s, 12 literat奴ros 拧altiniai, 10 pried懦.

The device consists of a power supply, ESP32 and STM32F405 microcontrollers, audio acquisition and processing systems, user interface control buttons, and a WS2812B light-emitting diode strip. After conducting a review of analogous devices, conclusions were drawn, and a structural diagram along with principal electrical schematics of the designed device were developed. A four-layer printed circuit board and a device housing were designed. Prior to programming, a program algorithm flowchart based on the finite-state machine principle was established, followed by microcontroller programming and dual-controller interaction development tasks. Finally, in the bachelor鈥檚 thesis, experimental testing of the constructed device was performed, an analysis of directions for further improvement was conducted, and the work results were summarized. The thesis consists of 9 chapters, including the introduction, analysis of analogous devices, structural diagram development, design of electrical schematics and printed circuit board, software algorithm and code development, experimental research, directions for further improvement, result summary, and reference list. The thesis comprises 64 pages of text without appendices, 47 illustrations, 3 tables, 12 references, 10 appendices.

Baigiamajame darbe projektuojamas ir tiriamas iki 1 W i拧臈jimo galios K da啪ni懦 juostos galios stiprintuvas, naudojant 250 nm GaN 鈥濿IN Semiconductors鈥� technologij膮. Projektavimui naudojama 鈥濳eysight ADS鈥� programa. Projektuojamas AB klas臈s vienos pakopos galios stiprintuvas. Suprojektuota schema ir topologija. Analizuojami veikimo da啪nio, i拧臈jimo galios, stiprinimo, efektyvumo (PAE), harmonik懦 gali懦, triuk拧mo, stabilumo, tarpusavio moduliacijos produkt懦 parametrai. 漠vertinama aplinkos temperat奴ros ir ribini懦 s膮lyg懦 寞taka galios stiprintuvo parametrams. Atliktas schemos ir topologijos parametr懦 palyginimas. I拧skirtos rezultat懦 tobulinimo kryptys. Baigiam膮j寞 ra拧to darb膮 sudaro 8 dalys: 寞vadas kartu su darbo aktualumo pagrindimu ir tikslu; teorin臈s med啪iagos analiz臈; analogi拧k懦 prietais懦 analiz臈; naudojamos technologijos analiz臈; galios stiprintuv懦 parametr懦 analiz臈; schemos ir topologijos projektavimas; apibendrinimas. Darbo apimtis 鈥� 102 p. be pried懦, 81 iliustracija, 4 lentel臈s, 38 literat奴ros 拧altiniai, 7 priedai.

The final thesis presents the design and analysis of a K-band power amplifier with an output power of up to 1 W, implemented using 250 nm GaN technology by WIN Semiconductors. The design process was carried out using the Keysight ADS simulation environment. A single-stage Class AB power amplifier was designed, including both schematic and layout implementations. The work analyzes the amplifier鈥檚 operating frequency, output power, gain, power-added efficiency (PAE), harmonic power levels, noise performance, stability, and intermodulation products. The influence of ambient temperature and process corners on the amplifier parameters is also evaluated. A comparison between schematic- and layout-level simulation results is presented, and potential improvements for further optimization are identified. The thesis consists of eight chapters: introduction with motivation and objectives; theoretical background analysis; review of similar devices; analysis of the applied technology; analysis of power amplifier parameters; schematic and layout design; and conclusions. The thesis comprises 102 pages excluding appendices, including 81 figures, 4 tables, 38 references, and 7 appendices.