Air core patch antennas suitable for multi-band UWB
2005 (English)In: Proc. GigaHertz 2005, Uppsala, Sweden, 2005, 218-221 p.Conference paper (Refereed)
As wireless communication applications grow rapidly, the demand for modular solutions with high performance and low profile antennas increases. For instance, the ultra wideband radio (UWB) utilizes the frequency band of 3.1-10.6 GHz. Integrateable antennas should be of planar structures. A Planar structure limits design options, regarding various performance aspects. For instance, the spectral efficiency, i.e., the bandwidth (BW) relative to the center frequency (CF) is limited. The antenna efficiency, i.e., gain relative to directivity is also limited. The antenna efficiency is important for receiver sensitivity, which is important in UWB systems. The efficiency is dependant of the antenna structure and material used. The Rogers 4350B material is suitable for high frequency modules since it has a low loss tangent that is stable over a wide frequency range, but the substrate height is limited. In this study a printed circuit board (PCB) with an air core was introduced to increase the antenna efficiency. The module is processed as two separate double-layer PCBs. This technique can be implemented to increase the performance in a narrowband as well as in a wideband antenna system. An advantage is that components can be placed on the other side of the ground plane without interference since the ground plane shields components from antenna radiation. A study of how the antenna bandwidth and efficiency are improved with the proposed structure at 3.5 and 10 GHz was conducted and presented.
Place, publisher, year, edition, pages
2005. 218-221 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-12796OAI: oai:DiVA.org:liu-12796DiVA: diva2:17073