Ultracompact Inverted Input Delay Doherty Power Amplifier with a Novel Power Divider for 5G mm-Wave

2022 Microwave Mediterranean Symposium (MMS), pp. 1–4

Abstract

This paper reports on the design of a Doherty power amplifier (DPA) for 5G mm-wave applications. Conversely to standard DPAs, this design presents a delay at the input of the carrier amplifier, which enhances the isolation of the peaking amplifier while the DPA is in its low power regime. Moreover, the circuit leverages a novel power divider (PD) to reduce both size and number of passive components. Moreover, the PD transforms the input impedance of the carrier and the peaking amplifiers to 50 Ω avoiding lossy matching networks. Performance consists of a peak gain without pre-driver amplifiers of more than 7 dB at 26.5 GHz, a back-off efficiency plateau of 5 dB, and a saturation power of more than 14 dBm. The circuit has been fabricated in the IHP 130-nm SiGe technology and occupies an effective area of 660×360 µm2, which makes it suitable to be integrated into a beamformer chip.

Authors 4

1. Aniello Franzese

   Leibniz Institute for High Performance Microelectronics

   Affiliation as printed

   IHP - Leibniz-Institut für innovative Mikroelektronik,Frankfurt Oder,Germany

2. Muh‐Dey Wei Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics, RWTH Aachen,Aachen,Germany

   Chair of High Frequency Electronics, RWTH Aachen, Aachen, Germany

3. Renato Negra Aachen Chair of High Frequency Electronics

   RWTH Aachen University

   Affiliation as printed

   Chair of High Frequency Electronics, RWTH Aachen,Aachen,Germany

   Chair of High Frequency Electronics, RWTH Aachen, Aachen, Germany

4. Andrea Malignaggi

   Leibniz Institute for High Performance Microelectronics

   Affiliation as printed

   IHP - Leibniz-Institut für innovative Mikroelektronik,Frankfurt Oder,Germany