K band substrate integrated waveguide power dividers /

Kiriş, Orçun
In this thesis, various K band power divider structures are developed using the substrate integrated waveguide (SIW) technology. In the design and production of the 1 x 2 Y and T - Junction power dividers known as the conventional power divider types, good agreements are observed between measured and simulated S11 results. Also, the differences between simulated and measured S21 results are approximately 0.4 – 0.8 dB at the operating frequency. In addition to these, 1 x 4 dividers obtained by successive addition of the conventional structures are designed and produced. The designed and fabricated Y & Y and T & Y - Junction SIW power dividers have approximately 0.6 dB and 0.4 dB insertion loss differences between the measurement and simulation results respectively. Moreover, there are good agreements between the S11 simulation and measurement results. Furthermore, a novel 1 x 8 power divider is proposed for unequal power division operation. The proposed divider is designed and fabricated to provide almost equal phases and -20 dB SLL Taylor (ñ=3) amplitude distribution at output ports. 8x1 and 8x4 slotted SIW arrays, fed through this power divider, are designed, fabricated and measured. Measurement results are compared with the simulations to verify the designs and measured far fields agree very well with the simulated ones.


Low loss substrate integrated waveguide n-way power divider
Mohammadi, Pejman; Demir, Şimşek; Department of Electrical and Electronics Engineering (2012)
Substrate Integrated Waveguide (SIW) technology has been used in designing and fabricating SIW n-way power dividers. In this thesis employing this technology three-port and five-port SIW power dividers are designed and fabricated. These structures are compact in size and the design procedure can be expanded into n-port power dividers. These structures are used with microstrip transition parts however measurement of S-parameters of the main structure are required for comparison. This is carried out with a spe...
Design of asymmetric coplanar strip folded dipole antennas /
Karaciğer, Kamil; Alatan, Lale; Department of Electrical and Electronics Engineering (2014)
This thesis includes the design, simulation, production and measurement of an asymmetric coplanar strip folded dipole antenna suitable to be used as an element in a linear array operating at S-band (2.7 GHz - 3.3 GHz). In this same manner, its usefulness as an array antenna is also explored in this thesis. This antenna element consists of a microstrip line feed, microstrip to coplanar stripline transition (BALUN) and asymmetric coplanar strip (ACPS) folded dipole. The planar folded dipole can be constructed...
Theoretical investigation and design of wideband dielectric resonator antennas
Yüksel, Yılmaz Çağrı; Alatan, Lale; Department of Electrical and Electronics Engineering (2015)
The aim of this thesis is to utilize Dielectric Resonator Antennas (DRA) as array elements due to their advantages over other conventional antenna elements such as dipoles and microstrip patches. Depending on both the excitation mechanisms and the antenna shape, a Dielectric Resonator Antenna (DRA) provides its designer multiple independent degrees of freedom. In this thesis three antenna shapes, namely hemispherical, cylindrical and rectangular DRAs, are investigated. The cylindrical and the rectangular sh...
Substrate integrated waveguide unequal power divider with adjustable dividing ratio
Mohammadi, P.; Demir, Şimşek (2014-01-01)
An unequal power divider with substrate integrated waveguide technology has been designed. This structure is compact in size and has the capacity to develop to the n-port unequal power divider. Its output powers ratio is also adjustable. The output powers can be easily change by varying the width of the output ports. The design procedure has been done analytically. Then a two-way unequal SIW power divider is designed. Simulation results of the proposed structure shows that return loss is below than10dB from...
Rectangular waveguide mode converters for creating monopulse radiation patterns
Duman, Onurhan; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2018)
For waveguide structures, there is an alternative way of creating three monopulse radiation patterns by using mode converters and radiating different waveguide modes (not only TE10 mode) for creating different monopulse radiation patterns. In the literature, different radiating modes are offered depending on waveguide shape. For rectangular waveguide, one suggestion is to radiate TE10 mode for the creation of sum channel radiation pattern, to radiate TE20 mode for the creation of azimuth difference radiatio...
Citation Formats
O. Kiriş, “K band substrate integrated waveguide power dividers /,” M.S. - Master of Science, Middle East Technical University, 2014.