Antenna Switch Embedded in Transmission Line Transformers of Differential PA and LNA

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An antenna switch embedded in the matching transmission line transformers (TLTs) of a differential power amplifier (PA) and LNA is presented, which selects the transmitter and receiver (Tx and Rx) in 5G communication systems. Because the switching function is implemented in the matching networks of a PA output and an LNA input, the chip size and insertion loss are reduced. A balun, an antenna switch, and matching networks of the PA and LNA are implemented simultaneously by carefully designing a three-port series-combining TLT with Tx and Rx switches. The measured insertion losses of Tx and Rx are 0.42 and 1.01 dB, respectively, at 28 GHz, and the isolation values of the Tx and Rx paths are 24.1 and 31.7 dB, respectively.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2021-03
Language
English
Article Type
Article
Citation

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v.31, no.3, pp.284 - 287

ISSN
1531-1309
DOI
10.1109/LMWC.2020.3044928
URI
http://hdl.handle.net/10203/282381
Appears in Collection
EE-Journal Papers(저널논문)
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