Sökning: "närfält"
Hittade 5 uppsatser innehållade ordet närfält.
1. PCBA verification and fault detection using a low-frequency GMR-based near-field probe with magnetic closed-loop feedback compensation : A non-contact alternative to physical probing
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : As electronics are getting both smaller and more advanced, the need to verify and validate remains and the means are getting more complex the more functions and components are added. Traditionally, in-circuit tests (ICTs) are performed by probing dedicated test points on the Printed Circuit Board Assembly (PCBA) in a test sequence that is unique to each product. LÄS MER
2. Electromagnetic Compatibility Scanner
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : With the increasing amount of wireless devices in use today. All from Bluetooth headphonesto smart fridges, which communicates wirelessly to a server or phone. The needfor the radio frequency spectrum to be free from disturbances is necessarily. LÄS MER
3. Characterization of Passive Intermodulation Distortion in MultiBand FDD Radio Systems
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Intermodulation distortion (IMD) is a phenomenon that results in generation of spurious distortion signals when two or more signals of different frequencies pass through a nonlinear system. In general, IMD occurs in active circuits of a radio system, however, passive wireless components such as filters, transmission lines, connectors, antennas, attenuators etc. LÄS MER
4. Konstruktion av EMC-skanner med CoreXY-teknik
Kandidat-uppsats, Uppsala universitet/Fasta tillståndets elektronikSammanfattning : En god elektromagnetisk kompatibilitet (EMC) är en viktig faktor vid konstruktion av kretskort. EMC syftar på ett systems kompatibilitet med sin omgivning och en god EMC innefattar att ett elektriskt system inte interfererar med sig själv eller närliggande system. LÄS MER
5. Efficient Computation of the Near-Field Mutual Coupling Between Antennas on Vehicles
Uppsats för yrkesexamina på avancerad nivå, KTH/Elektroteknisk teori och konstruktionSammanfattning : A near-eld generalization of Friis transmission equation has previously been proposed in the literature. Using this generalization, it is possible to calculatethe mutual coupling between two antennas as a weighted integral over the antenna far-fields. LÄS MER