A compact, low-profile, broadside radiating two-element Huygens dipole array facilitated by a custom-designed decoupling element

Ming Chun Tang, Xiaoming Chen, Ting Shi, Hanwen Tu, Zhentian Wu, Richard W. Ziolkowski

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A compact, low-profile, broadside radiating, two-element Huygens dipole array is developed for in-band full-duplex (IBFD) applications. Each radiating element is a multilayer near-field resonant parasitic (NFRP) design that is electrically small with ka = 0.76 at its resonance frequency, f0 = 1.511 GHz. The center-to-center distance between the elements is only 0.3λ0. The array's outstanding performance is facilitated by a custom-designed decoupling element. This specially engineered scatterer is printed on an additional layer and consists of a pair of meander-line resonators connected by a metallic strip. The overall height of the entire system is only λ0/20.3. The passive decoupling element operates as several electrically small electric dipoles whose scattered fields mitigate the interactions between the two radiators. It provides very high isolation levels between them and improves the overall directivity of the array. The optimized array was fabricated, assembled, and tested. The measured results, in good agreement with their simulated values, confirm that the developed decoupling structure not only increases the peak isolation level from 14.4 to 50.4 dB but it also improves the peak realized gain in the broadside direction by 0.5 dB and the corresponding front-to-back ratio (FTBR) value by 14.4 dB.

Original languageEnglish (US)
Article number9318472
Pages (from-to)4546-4557
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume69
Issue number8
DOIs
StatePublished - Aug 2021
Externally publishedYes

Keywords

  • Antenna array
  • Broadside radiating
  • Decoupling elements
  • Electrically small antennas
  • Huygens dipole antennas (HDAs)
  • Mutual coupling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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