A Dual-Fed PIFA Antenna Element With Nonsymmetric Impedance Matrix for High-Efficiency Doherty Transmitters: Integrated Design and OTA-Characterization
Artikel i vetenskaplig tidskrift, 2020

A single planar inverted F-antenna is proposed employing two input ports to optimally power-combine the output signals of two nonlinear power amplifiers inside the metal-only low-loss antenna structure. High power-added efficiency (PAE) at back-off power levels is reached through a Doherty combiner architecture, where the optimal power combination is seen to generally require the synthesis of a nonsymmetric antenna input impedance matrix. The dual-fed antenna is compact and exhibits close to single-mode radiation properties; it has a relatively stable gain pattern despite the nonequal Doherty power amplifier (PA) output powers. An integrated active prototype has been designed, fabricated, and characterized over-the-air in both an anechoic and a reverberation chamber. Good agreement is observed and an uncertainty analysis is performed. The Doherty transmitter features a max-PAE of 58 at 2.14 GHz and a 6 dB back-off PAE of 52; a minimum system power gain of 9.5 dB (max 12 dB); and a maximum system output power of 43.5 dBm.

Antenna integration

Doherty power amplifier

Antennas

Författare

Oleg Iupikov

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

William Hallberg

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Rob Maaskant

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Robert Rehammar

Bluetest

Koen Buisman

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Marianna Ivashina

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

IEEE Transactions on Antennas and Propagation

0018926x (ISSN) 15582221 (eISSN)

Vol. 68 1 21-32 8836665

INITIATE=InNovatIve acTIve integrATED antennas

VINNOVA (2018-01535), 2018-09-01 -- 2020-08-31.

VINNOVA (2017-03553), 2017-10-24 -- 2018-01-31.

Ämneskategorier

Telekommunikation

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1109/TAP.2019.2938738

Mer information

Senast uppdaterat

2022-04-05