Analysis of various microstrip printed geometries using closed-form green’s functions

Download
2013
Ülkü, İrem
In general, current distributions for different microstrip structures such as Single Microstrip Line (SML), Coupled Microstrip Line (CML) and Microstrip Patch Antenna (MPA) are obtained by using Method of Moments (MoM) in conjuction with closed-form spatial domain Green’s functions. Specifically, MPA is designed to obtain a Wideband Microstrip Patch Antenna (WMPA). The current distribution is acquired by the same analysis and bandwidth is obtained from the return loss graph for this WMPA. Standard MPA and WMPA bandwidths are compared. First, MoM analysis is used to find the current distribution of SML. Then, current distribution on CML is found, in that case by considering the interaction between the lines. Afterward, current distribution on MPA is calculated. Finally, WMPA is obtained by opening two parallel slots on the metal patch of standard MPA. Current distribution on WMPA is found by using matrix deleting method such that there is no need to re-execute software program for this new geometry. Thereafter, bandwidth of WMPA is obtained from the return loss graph. Bandwidth values for standard MPA and WMPA are compared and the increase in bandwidth is observed.

Suggestions

A Non-Galerkin Spatial-Domain Approach for Efficient Calculation of the Dispersion Characteristics of Microstrip Lines
Guedue, Tamer; Alatan, Lale (2008-07-11)
In the analysis of dispersion characteristics of microstrip lines, spectral domain approaches has been preferred as opposed to the spatial domain calculations since the spatial domain Green's functions corresponding to the microstrip structure require the numerical evaluation of inverse Fourier transform integrals which are computationally expensive. However as demonstrated in Bernal, J. et al, (2000), the discrete complex image representation of the spatial domain Greenpsilas functions eliminates the need ...
Assessment of alternative simulation techniques in nonlinear time history analyses of multi-story frame buildings: A case study
Karim Zadeh Naghshineh, Shaghayegh; Askan Gündoğan, Ayşegül; Yakut, Ahmet (2017-07-01)
In regions with sparse ground motion data, simulations provide alternative acceleration time series for evaluation of the dynamic response of a structure. Different ground motion simulation methods provide varying levels of goodness of fit between observed and synthetic data. Before using the seismologically acceptable synthetic records for engineering purposes, it is critical to investigate the efficiency of synthetics in predicting observed seismic responses of structures. For this purpose, in this study ...
ANALYSIS OF MILLIMETER WAVE-GUIDES ON ANISOTROPIC SUBSTRATES USING THE 3-DIMENSIONAL TRANSMISSION-LINE MATRIX-METHOD
BULUTAY, C; PRASAD, S (1993-06-01)
Three-dimensional condensed asymmetrical node, variable grid, transmission-line matrix (TLM) method has been used in analyzing several millimeter waveguides on anisotropic substrates. The dispersion characteristics of image guides together with field and energy confinement properties at millimeter-wave frequencies have been investigated. Edge coupled microstrip line on a uniaxial substrate is analyzed for the even and odd mode dispersion characteristics. Finally the same analysis is repeated for bilateral f...
Analysis of dual - polarized aperture - coupled microstrip antennas with H-shaped slots and equivalent circuit modeling of H shaped slots
İşeri, Kadir; Alatan, Lale; Department of Electrical and Electronics Engineering (2012)
This thesis includes the design, production and measurement of a wideband dualpolarized X-band aperture-coupled microstrip patch antenna. The wideband and dual-polarized operation is achieved through the use of H-shaped coupling slots. Therefore, the equivalent circuit modeling of a microstrip line fed H-shaped slot is also studied in this thesis. A step-by-step procedure is followed during the design process of the dual-polarized aperture-coupled microstrip antenna. First, an aperture-coupled microstrip an...
Design of Irregularly Shaped Patch Antennas by using the Multiport Network Model
Sener, Goker; Alatan, Lale; Kuzuoğlu, Mustafa (2008-07-11)
The multiport network model (MNM) is an analytical method that is used to analyze microstrip antennas. MNM is based on defining ports along the periphery of the patch and evaluating the impedance matrix corresponding to these ports by using the Greenpsilas function for the cavity under the patch. For regular rectangular, triangular and circular patches, analytical expressions for the Greenpsilas function are available. In the analysis of irregular patches, Greenpsilas functions cannot be calculated explicit...
Citation Formats
İ. Ülkü, “Analysis of various microstrip printed geometries using closed-form green’s functions,” M.S. - Master of Science, Middle East Technical University, 2013.