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A high‐isolation mimo antenna with dual‐feed structure for WiFi of mobile phones
Author(s) -
Lee WonWoo,
Cho YongSang
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30427
Subject(s) - antenna (radio) , engineering , electrical engineering , radiator (engine cooling) , coaxial antenna , multi band device , microwave , antenna rotator , electronic engineering , acoustics , physics , omnidirectional antenna , telecommunications , mechanical engineering
In this letter, we develop a new Multiple‐Input Multiple‐Output (MIMO) antenna that has two independent signal feed‐points in a single antenna element. This antenna is composed of a cross‐coupled semi‐loop (CCSL) structure and an inverted‐F antenna (IFA) operating at 2.4–2.483 GHz and 5.15–5.85 GHz. The dual‐port structure is implemented by adding a CCSL antenna as the secondary radiator to the ground short of an IFA. To achieve isolation between the signal‐feeding ports of the antenna at the same operating frequency, a loop‐type coupling pattern is used to make the induced current flow orthogonal with respect to that of the other feeding port. The measured isolation performance between the feeding ports greater than 12 dB at 2.4 GHz and greater than15 dB at 5.5 GHz. We show that the proposed antenna has an Envelope Correlation Coefficient value as low as 0.3 at the 2.4 GHz band and as low as 0.1 at the 5.5 GHz band. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:930–934, 2017