Efficient RF voltage transformer with bandpass filter characteristics
2013 (English)In: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 49, no 3, 198-199 p.Article in journal (Refereed) Published
A microwave bandpassfilter with a large ratio between the output andthe input impedance has been designed and fabricated. Consequently,it functions both as a voltage transformer and a bandpassfilter, or trans-filter for brevity. It represents a two-port micro-acoustic resonatoremploying Lamb waves in a thin piezoelectric AlNfilm grown ontoa Si carrier substrate with a centre frequency of around 887 MHz.The transfilter has a transformer ratio of 10 and a voltage efficiencyof over 80%. The component has a small size ( < 0.5 mm2) and isshown to sustain power levels of 250 mW. It can be used in avariety of cases where both voltage amplification and frequencyfilter-ing are required. Examples include: charge pumps in RFID tags,energy scavenging, remotely triggered switches, wake-up radios inwireless networks, stand-by units in home electronics etc.
Place, publisher, year, edition, pages
iet , 2013. Vol. 49, no 3, 198-199 p.
wireless, Lamb wave, trasnformer, RF
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Microsystems Technology; Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-185262DOI: 10.1049/el.2012.3982ISI: 000318542500023OAI: oai:DiVA.org:uu-185262DiVA: diva2:571094
ProjectsWiSENET and VR granted "Thin Film Guided Microacoustic Waves in Periodical Systems: Theory and Applications "
FunderVinnovaSwedish Research Council, 2009-5056