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 language | English |
|---|---|
| Article number | 8580055 |
| Journal | IEEE International Ultrasonics Symposium, IUS |
| Volume | 2018-January |
| DOIs | |
| State | Published - 2018 |
| Externally published | Yes |
| Event | 2018 IEEE International Ultrasonics Symposium, IUS 2018 - Kobe, Japan Duration: 22 Oct 2018 → 25 Oct 2018 |
Keywords
- BAW filters
- Circuit simulation
- Electrothermal effects
- Harmonic analysis
- Microwave measurement
- Power amplifiers
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