This project deals with the design, manufacturing and characterization of a complete Radiofrequency Pulse Width Modulation (RF-PWM) transmitter working in the P band (435 MHz). The RF-PWM unit is constituted by a pulse width controlled driver (PWCD) able to directly drive a class E switched mode power amplifier (SMPA). The SMPA is based on 40 W packaged GaN transistor by UMS (CHK040A). The PWCD chip includes the pulse width modulation and driving functions realized on the 250 nm BiCMOS process from IHP (SGB25VGD). A maximum output power of 44 W with an associated drain efficiency higher than 71% have been obtained in a static characterization. Moreover, the capability of controlling the output power level in a dynamic range of 4.2 dB by transforming the AM signal in a constant amplitude signal with variable duty cycle at transistor input has been proved.
The behaviour of the unit when is excited with different digital modulated signals has been checked. Good linearity (EVM and ACPR) and average efficiency figures have been obtained when the unit is excited with signals with 4.4 dB of dynamic range and baseband bandwidths of 1 MHz.
The good linearity, efficiency and output power results obtained with a pulse signal excitation validated the potential use of the unit in radar applications.
Short Speaker Information
Lorena Cabria has been the responsible for the project’s management, the coordination of subcontractors and execution of the overall program. Also, she was the responsible of the design of the high power RF pulse width unit and the complete breadboard.
Lorena Cabria received the Telecommunications Engineering and the Ph. D. degrees (with and Extraordinary Doctoral Prize) from the University of Cantabria, Santander, Spain, in 2001 and 2007 respectively. Between 2001 and 2011, she worked as a Research Associate in the RF and Microwave Group at the University of Cantabria. Currently, she is working as RF Design Engineer at TTI, Santander, Spain. Her main research interests include RF and microwave integrated circuits, intermodulation distortion control on RF and microwave applications, high efficiency power amplifiers and emerging wireless transmitter architectures.
| CONTRACT FRAME (ARTES, ITI, TRP, GSTP, NPI, ...) |
TRP
|
| BUDGET (k€) |
500
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| ENTITIES (Including country) |
TTI (Spain), IMST GmbH (Germany), Tor Vergata (Italy)
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| Proposed Duration |
30'
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