Investigation of Thermal and Non-Linear Effects on the Performance of the Power Amplifier - BAW Filter - Chain in a LTE Transmitter

Uwe Stehr, J. Stegner, M. A. Hein, V. Chauhan, V. Silva, R. Weigel, A. Hagelauer, A. Frank, S. Michael

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Thermal and non-linear effects on the power amplifier - bulk-acoustic wave (BAW) filter chain of a transmitter for LTE band 2 (1850 MHz to 1910 MHz) are investigated. Both components are co-designed and densely packaged using a silicon-ceramics substrate technology. Thermal effects, caused by the DC power dissipation of the power amplifier on the complete TX chain, are examined using finite-element thermal and electrical co-simulation. It is revealed, that the heating of the BAW filter due to the power dissipation of the power amplifier leads to a frequency shift of the filter passband. The influence of non-linear effects, caused by the RF power level, is investigated by a comparison of measurements of the single components and the TX chain. Furthermore, the generation of second-order sub-harmonic and harmonic signals is explored.

Original languageEnglish
Article number8580055
JournalIEEE International Ultrasonics Symposium, IUS
Volume2018-January
DOIs
StatePublished - 2018
Externally publishedYes
Event2018 IEEE International Ultrasonics Symposium, IUS 2018 - Kobe, Japan
Duration: 22 Oct 201825 Oct 2018

Keywords

  • BAW filters
  • Circuit simulation
  • Electrothermal effects
  • Harmonic analysis
  • Microwave measurement
  • Power amplifiers

Fingerprint

Dive into the research topics of 'Investigation of Thermal and Non-Linear Effects on the Performance of the Power Amplifier - BAW Filter - Chain in a LTE Transmitter'. Together they form a unique fingerprint.

Cite this