Broadband dual-polarized MICROSTRIP antenna fed with horizontal coaxial baluns

Jeen-Sheen Row, Ting Hung Ko

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel feed mechanism for dual-polarized microstrip patch antennas with broadband operation and high isolation is presented. The feed structure is a coaxial balun composed of coaxial cables and copper tubes, and it is placed parallel to the ground plane. With the horizontal coaxial baluns, the radiating patch can be symmetrically excited through proximity coupling. For the proposed feed mechanism, the parametric analyses are performed, and the critical dimension affecting the impedance bandwidth of the microstrip antenna is also addressed. An antenna prototype is constructed, and its measured results indicate that the microstrip antenna can give an impedance bandwidth of more than 20%, and within the bandwidth, the isolation between the two orthogonal ports is higher than 40 dB; moreover, symmetrical broadside radiation with low cross polarization is obtained. Simulated results for the cases of microstrip antennas with various substrate thicknesses are also provided.

Original languageEnglish
Pages (from-to)3053-3059
Number of pages7
JournalMicrowave and Optical Technology Letters
Volume60
Issue number12
DOIs
Publication statusPublished - 2018 Dec 1

Fingerprint

antenna feeds
microstrip antennas
Antenna feeders
Microstrip antennas
Antennas
broadband
bandwidth
isolation
Bandwidth
impedance
coaxial cables
patch antennas
cross polarization
Coaxial cables
proximity
antennas
prototypes
Copper
tubes
copper

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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abstract = "A novel feed mechanism for dual-polarized microstrip patch antennas with broadband operation and high isolation is presented. The feed structure is a coaxial balun composed of coaxial cables and copper tubes, and it is placed parallel to the ground plane. With the horizontal coaxial baluns, the radiating patch can be symmetrically excited through proximity coupling. For the proposed feed mechanism, the parametric analyses are performed, and the critical dimension affecting the impedance bandwidth of the microstrip antenna is also addressed. An antenna prototype is constructed, and its measured results indicate that the microstrip antenna can give an impedance bandwidth of more than 20{\%}, and within the bandwidth, the isolation between the two orthogonal ports is higher than 40 dB; moreover, symmetrical broadside radiation with low cross polarization is obtained. Simulated results for the cases of microstrip antennas with various substrate thicknesses are also provided.",
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Broadband dual-polarized MICROSTRIP antenna fed with horizontal coaxial baluns. / Row, Jeen-Sheen; Ko, Ting Hung.

In: Microwave and Optical Technology Letters, Vol. 60, No. 12, 01.12.2018, p. 3053-3059.

Research output: Contribution to journalArticle

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