Dual-polarized Patch Antenna of Large Frequency Tuning Range at mm-Wave Frequency Bands

Quangang Chen*, Juha Ala-Laurinaho, Alexander Khripkov, Janne Ilvonen, Resti Montoya Moreno, Ville Viikari

*Corresponding author for this work

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

1 Citation (Scopus)
53 Downloads (Pure)


In this paper, we present a dual-polarized frequency-reconfigurable patch antenna working at millimeter wave frequency bands for 5G applications. A square patch is surrounded by four metallic L-shaped walls. Four ideal varactor diodes are placed between the corners of the square patch and L-shaped walls. Frequency tunability is achieved by adjusting the capacitances of the varactor diodes. Two 50-Ω probes are used to feed the square patch which can excite two orthogonal polarizations. Operating frequency can vary from 23 GHz to 45 GHz with a 10-dB return loss when the capacitance decreases from 0.05 pF to 0.005 pF. The isolation between two polarizations is better than 13 dB over the operating frequency bands. Cross-polarization level is lower than -15 dB. In addition, the quality factor of varactor diodes is studied to demonstrate its influence on antenna efficiency.

Original languageEnglish
Title of host publication17th European Conference on Antennas and Propagation, EuCAP 2023
ISBN (Electronic)978-8-8312-9907-7
ISBN (Print)978-1-6654-7541-9
Publication statusPublished - 2023
MoE publication typeA4 Conference publication
EventEuropean Conference on Antennas and Propagation - Florence, Italy, Florence, Italy
Duration: 26 Mar 202331 Mar 2023
Conference number: 17


ConferenceEuropean Conference on Antennas and Propagation
Abbreviated titleEuCAP
Internet address


  • 5G
  • dual polarized patch antenna
  • frequency reconfigurable
  • mm-Wave
  • varactor diode


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