liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Miniaturized quadrature hybrid and rat race coupler utilizing coupled lines for LTE frequency bands
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Nowadays, demands for fully integrated and miniaturized RFIC (Radio Frequency Integrated Circuits) have increased in wireless microwave communication system. Passive components such as coupler, divider and filters are always fabricated in outside of ICs due to their bulky sizes, which have been a great barrier to a realization of a fully integrated design. To solve this problem, miniaturization of passive components is one of the big issues at the present time. This paper shows the development of two important microwave passive components, quadrature hybrid and rat-race couplers for LTE lower (698 -960 MHz) and higher (1.71 - 2.70 GHz) frequency bands, which are obtained by replacing quarter-wave (λ/4) transmission line of a conventional coupler by their equivalent coupled line, resulting in significant size reduction. The miniaturized quadrature and rat race couplers are designed and fabricated with a Rogers 4360 substrate as a platform in producing significantly reduction. The design is validated by electromagnetic simulation and measurement. The size of the implemented quadrature hybrid coupler is 30 × 26.8 mm^2 and 14.9 × 12.5 mm^2, which are 82.60 % and 69.03% compared to the conventional couplers for lower and higher frequency band respectively. And, 55.5 × 27.9 mm^2 and 19.2 × 14.8 mm^2 for rat race coupler, which are 79.69 % and 62.35 % compared to the conventional coupler for lower and higher frequency band, respectively. Also, the reflection coefficient and the isolation are as good as conventional one and coupling procedure is similar or better than it.

Place, publisher, year, edition, pages
2013. , 80 p.
Keyword [en]
Coupler, quadrature hybrid coupler, rat race coupler, LTE frequecy band, miniaturization, coupled line, microwave communication etc.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-98675ISRN: LiU-ITN-TEK-A-13/035--SEOAI: diva2:655278
Subject / course
Electrical Engineering
Available from: 2013-10-10 Created: 2013-10-10 Last updated: 2013-10-10Bibliographically approved

Open Access in DiVA

fulltext(3910 kB)869 downloads
File information
File name FULLTEXT01.pdfFile size 3910 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Rahman, Masiur
By organisation
Physics and ElectronicsThe Institute of Technology
Other Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 869 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 209 hits
ReferencesLink to record
Permanent link

Direct link