A compact WLAN MIMO antenna with improved isolation for portable devices

2014 ◽  
Author(s):  
Zong Chen ◽  
Shiwen Yang ◽  
Quanjiang Zhu
Keyword(s):  
Portable Devices ◽  
Mimo Antenna

A simple and effective broadband decoupling structure for UWB-MIMO antenna

2021 ◽  
pp. 1-6
Author(s):  
Huiqing Zhai ◽  
Kunming Zhang ◽  
Yu Huo ◽  
Chaozong Guo
Keyword(s):  
Common Ground ◽  
Impedance Matching ◽  
Antenna Element ◽  
Portable Devices ◽  
Excellent Performance ◽  
Mimo Antenna ◽  
Measurement Results ◽  
New Type ◽  
Better Than ◽  
Microstrip Feed

Abstract A new type of closed square ring decoupling structure is proposed in this letter, which can effectively reduce the coupling of antennas. The designed antenna is composed of two elliptical monopoles and a common ground loaded with a broadband parasitic decoupling structure. Considering the impedance matching, each antenna element is changed from the original rectangular microstrip feed to a tapered microstrip feed and etched a circular slot on the elliptical monopole patch. By comparison with the original antenna without any decoupling structure, through loading the broadband decoupling structure on the ground, the antenna isolation is improved by 10 dB in most frequency bands. Comparing simulation and measurement results, the antenna achieves better than 25 dB isolation over the whole operating band (3.3–12 GHz). By manufacturing and testing the antenna designed in this article, the excellent performance parameters obtained also prove that the antenna can be used in portable devices.

Multiband Printed Slot Meander Patch Antenna for MIMO Implementation in 4G Handheld Devices

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Nassrin Ibrahim Mohamed ◽  
Tharek Abd. Rahman ◽  
Mursyidul Idzam Sabran
Keyword(s):  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Handheld Devices ◽  
Portable Devices ◽  
Patch Antennas ◽  
Mimo Antenna ◽  
Low Profile ◽  
Proposed Model ◽  
Multiple Input ◽  
Input Multiple Output

This paper presents a Low-profile slot meander patch antennas. The antenna is a multiple communication bands for handheld devices and implements multiple-input–multiple-output (MIMO) technique. The proposed model covers LTE band-11 1.5 GHz Lower (1427.9 - 1452.9, 1475.9 - 1500.9), LTE band-2 PCS 1900 (1930 -1990, 1850 -1910), LTE band-7 2.6 GHz (2620-2690, 2500- 2570), and LTE band-22 3.5 GHz (3510-3590, 3410-3490) with dB matching criterion (VSWR 3:1). An isolation less than -15 dB has been obtained between two typical slot meander patch antennas. The isolation is achieved as a result of using CPW feeding mechanism and inserted CLL network isolator. This dual-feed (2-elements) planar antenna is fabricated and measured. The result of this small size structured MIMO antenna system shows a good radiation characteristics and small mutual coupling which is promising for MIMO applications in compact portable devices.

Compact MIMO Antenna for Portable Devices in UWB Applications

2013 ◽  
Vol 61 (8) ◽  
pp. 4257-4264 ◽  
Author(s):  
Li Liu ◽  
S. W. Cheung ◽  
T. I. Yuk
Keyword(s):  
Portable Devices ◽  
Mimo Antenna ◽  
Uwb Applications

scholarly journals A compact disc loaded curved elliptical shaped ultra-wideband MIMO antenna

2018 ◽  
Vol 7 (2.7) ◽  
pp. 597
Author(s):  
EVV Satyanarayana ◽  
Vivek Kumar ◽  
D Mallikarjun Reddy ◽  
T Siva Paravathi ◽  
J Chandrasekhar Rao
Keyword(s):  
Common Ground ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Wide Band ◽  
Ultra Wideband ◽  
Portable Devices ◽  
Mimo Antenna ◽  
Uwb Applications

The ultra wide band (UWB) Multiple-Input- Multiple-Output (MIMO) antenna with coplanar waveguide (CPW) having size of 18 x 23 x 0.8mm3 is designed for ultra-wideband (UWB) applications. The designed MIMO antenna contains two symmetrical circular disc loaded curved elliptical monopoles on top of the substrate and common ground plane with Y slot and extended T-shaped stub on bottom of substrate. The T- shape stub is placed on the ground plane to have the better antenna impedance matching and to enhance the isolation between the two antenna ports. To further improve the isolation in between the ports 1 and 2, and also on the ground plane a Y-shaped slot is fixed. Good impedance matching (|S11| < -10dB) in the range from 2.8GHz to 12 GHz is provided by the proposed antenna, and an enhanced isolation of -27dB, low ECC of below 0.002, an acceptable gain of about 7 dBi and an efficiency of above 90%. The obtained result proves that the designed antenna is more appropriate for the portable devices.  

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