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Integration of wideband differential coupler with wideband differential MIMO antenna
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesisAlternative title
Differential MIMO antenna with a 180º differential hybrid coupler (English)
Abstract [en]

In the modern wireless communication system, the antenna plays an important role for transmitting and receiving the electromagnetic waves. In general, antenna is a backbone in wireless communication technology. In this project a dipole antenna which covers a number of communication standards was developed, i.e., it can operate in a number of common commercial frequency bands. Such as UHF band, frequency for the Long Term Evolution (LTE), mobile communications are 2G and 3G. This thesis work consists of two major parts, the first is the dipole antenna, the second is the differential coupler design, and also coupler in combination with antenna. The frequency band of interest is 0.7 - 3 GHz in all cases.

Different researches going on MIMO antenna which improves the bit error rate as well as the signal to noise ratio of the system. MIMO antenna setup requires certain amount of spacing between the antennas to reduce the mutual coupling.

In this project two antennas has been joined into a MIMO antenna setup, either by using a 90º or a 180º differential coupler has been investigated. The purpose of the coupler is to act as a decoupling network to make the antennas independent. In the development process, different designs have been investigated; different shapes of the dipole antenna have reviewed in literature study. Finally, a rectangular bevel shaped antenna was designed and used for the MIMO antenna study, and good performance for the antenna was achieved in the specified frequency range 0.7 - 3 GHz. Simulations were done using the Advanced Design System (ADS) software from Agilent Technologies Inc, and measurements were done using a Rhode & Schwarz ZVM vector network analyzer. The antenna and decoupling network was designed on Rogers 4360 (RO4360) substrate.

Place, publisher, year, edition, pages
2012. , 72 p.
Keyword [en]
MIMO, Roger, Differential Coupler, LTE, 3G, dipole antenna, ADS
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-82093ISRN: LIU-ITN-TEK-A--11/073--SEOAI: diva2:557763
Subject / course
2011-11-21, TP31, Linköping University, entréplan, Täppan, Norrköping, 13:00 (English)
Available from: 2012-11-07 Created: 2012-09-28 Last updated: 2012-11-07Bibliographically approved

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