Efficient RF voltage transformer with bandpass filter characteristics

Moreira, Milena (author): Uppsala universitet,Fasta tillståndets elektronik,Thin Films Group

Bjurström, Johan (author): Uppsala universitet,Fasta tillståndets elektronik,Thin Films Group

Katardjiev, Ilia (author): Uppsala universitet,Fasta tillståndets elektronik,Thin Films Group

Yantchev, Ventsislav (author): Uppsala universitet,Fasta tillståndets elektronik,Thin Films Group

(creator_code:org_t)

2013-01
2013
English.
In: Electronics Letters. - : iet. - 0013-5194 .- 1350-911X. ; 49:3, s. 198-199

Related links:: http://www.theiet.or...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

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.

TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

By the author/editor: Moreira, Milena; Bjurström, Johan; Katardjiev, Ilia; Yantchev, Ventsi ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Other Electrical ...

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