Optimised antennas for small form-factor devices: Development of quarter-wave antennas for small ground plane
Translated title
Optimerede antenner til små formfaktor enheder
Author
Damborg, Oliver Falkenberg
Term
7. semester
Education
Publication year
2024
Submitted on
2024-01-04
Pages
106
Abstract
Efterhånden som flere produkter bliver trådløse, skal antenner passe ind i meget små enheder som headsets. Dette projekt udvikler en antenne specifikt til et lille trådløst headset ved at tage udgangspunkt i de mekaniske specifikationer for RTX A/S RTX8950. Der blev udformet flere prototyper, simuleret på computer og derefter bygget og målt for at vurdere, hvor godt simulationerne forudsiger de virkelige målinger. Indsigterne blev brugt til at forbedre simuleringsmodellen og optimere antennedesignet. Antennerne blev også anvendt i udviklingen af printplader med to antenner. Udvalgte prototyper viste høj antenneforstærkning (hvor effektivt antennen kan sende eller modtage), men kræver små impedanstilpasninger for at opfylde kravet til returtab (et mål for hvor meget af signalet der reflekteres tilbage). De dobbelte antenneprint blev ikke målt, men simulationer viser lovende resultater. Der er dog behov for at reducere koblingen mellem antennerne, hvilket fremgår af S12-parameteren i simulationerne.
As more products go wireless, antennas must fit inside very small devices such as headsets. This project designs an antenna specifically for a small wireless headset, based on the mechanical specifications of the RTX A/S RTX8950. Several prototypes were designed, simulated, built, and measured to see how well computer simulations predict real measurements. These results were used to refine the simulation model and optimize the antenna design. The antennas were also used to develop printed circuit boards (PCBs) with two antennas. Selected prototypes showed high antenna gain (how efficiently the antenna transmits or receives in a given direction), but still need minor impedance matching adjustments to meet the return loss requirement (a measure of how much signal is reflected back). Although the dual-antenna PCBs were not measured, simulations indicate promising performance. However, coupling between the two antennas—shown by the S12 parameter, a standard indicator of signal leakage—needs to be reduced.
[This abstract was generated with the help of AI]
Keywords
DECT ; Antenner ; CST ; optimering
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