A Frequency Tunable MIMO Antenna Cluster with Transmitter IC

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)


This paper demonstrates the feasibility of an transmitter system where a handset MIMO antenna is fed by a 0.5-4.5 GHz integrated transmitter front-end to implement a frequency-tunable antenna cluster. The transmitter implementation performs on-chip amplitude and phase tuning to provide compatible MIMO performance over a wide frequency range in the low bands (700 MHz-960 MHz) and the high bands (1.5 GHz-4.5 GHz). The antenna is built with 8 elements comprising 4 clusters, two for low-band frequencies and two for higher frequencies. The transmitter-IC driving the antenna cluster is implemented in a 28-nm CMOS process with an active chip area of only 0.2 mm2. The proof-of-concept implementation demonstrates enhanced antenna efficiencies from -6.5 dB to -1.5 dB across the frequency bands, and envelope correlation coefficient below 0.4. The measurement results indicate that the antenna cluster technique can be applied with a real integrated transmitter to enhance MIMO operation of mobile antennas.

Original languageEnglish
Title of host publication15th European Conference on Antennas and Propagation, EuCAP 2021
Number of pages5
ISBN (Electronic)9788831299022
Publication statusPublished - 22 Mar 2021
MoE publication typeA4 Article in a conference publication
EventEuropean Conference on Antennas and Propagation - Dusseldorf, Germany
Duration: 22 Mar 202126 Mar 2021
Conference number: 15


ConferenceEuropean Conference on Antennas and Propagation
Abbreviated titleEuCAP


  • CMOS
  • MIMO
  • multiport antenna
  • reconfigurable antenna
  • transmitter


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