A simple quad-band printed diversity antenna with high isolation without extra structure

Azadeh Imani; Mohammad Sajjad Bayati

doi:10.1515/freq-2019-0220

Article

A simple quad-band printed diversity antenna with high isolation without extra structure

Azadeh Imani and Mohammad Sajjad Bayati

Published/Copyright: June 29, 2020

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From the journal Frequenz Volume 74 Issue 9-10

Abstract

In this paper a Quad-band diversity antenna with a small size of 48 × 28 × 0.8 mm³ printed on FR4 substrate is presented that consists of two same pentagonal-shaped patch elements. Four arc-shaped slots in the radiating elements are introduced to obtain the quad-band operation with good return loss. The antenna is designed for covering 5.91 GHz in IEEE 802.11 b/g/n standards, 7.40 GHz in C-Band, 9.18 and 10.72 GHz in X-Band. To achieve the lowest coupling between two elements, three structures for embedding elements are investigated. The prototype is fabricated, and measured results are in good agreement with simulated results. The final antenna accomplishes a weak mutual coupling below −29.2 dB in the all operational bands. Radiation characteristics, radiation efficiency and diversity performance such as diversity gain and envelope correlation coefficient of the final structure, are presented.

Keywords: arc-shaped slot; diversity antenna; high isolation; MIMO antenna; multiband antenna

Corresponding author: Mohammad Sajjad Bayati, Electrical and Computer Engineering Faculty, Razi University, Kermanshah, Iran, E-mail: s.bayati@razi.ac.ir

Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2019-12-24

Accepted: 2020-05-05

Published Online: 2020-06-29

Published in Print: 2020-09-25

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Articles in the same Issue

https://doi.org/10.1515/freq-2019-0220

Keywords for this article

arc-shaped slot; diversity antenna; high isolation; MIMO antenna; multiband antenna