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Near-field Mutual Coupling Assessment in Co-platform Antennas Using a Modified Friis Transmission Formula

  • Yunru Zhao*
  • , Peng Liu
  • , Qi Wu
  • *Corresponding author for this work
  • Beihang University
  • Key Lab of Science and Technology on High Performance Electromagnetic Windows

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Near-Field mutual coupling between a transmitting (Tx) phased array and a receiving (Rx) antenna on a shared platform is pre-evaluated during beam scanning. The modified Friis transmission formula incorporates relative spatial positions and polarization mismatch of each Tx-Rx antenna pair. Under the assumption that the array's near-field region satisfies far-field conditions for individual elements, the total received power is calculated via the superposition theorem and the time-averaged Poynting vector. Configurations with high elevation angles are analyzed, considering both a single helix antenna and a truncated 4×3 patch array as Rx antennas. Numerical validation confirms the modified Friis formula's effectiveness for efficient near-field coupling assessment in co-platform scenarios.

Original languageEnglish
Title of host publicationAPMC 2025 - 2025 Asia-Pacific Microwave Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798331534554
DOIs
StatePublished - 2025
Event2025 Asia-Pacific Microwave Conference, APMC 2025 - Jeju Island, Korea, Republic of
Duration: 2 Dec 2025 → 5 Dec 2025

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
ISSN (Electronic)2690-3946

Conference

Conference2025 Asia-Pacific Microwave Conference, APMC 2025
Country/TerritoryKorea, Republic of
CityJeju Island
Period2/12/25 → 5/12/25

Keywords

  • beam steering
  • mutual coupling
  • near-field region
  • patch antennas
  • phased arrays

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