DocumentCode :
972061
Title :
A Transmission Line Method to Compute the Far-Field Radiation of Arbitrary Hertzian Dipoles in a Multilayer Structure Embedded With PEC Strip Interfaces
Author :
Xuan Hui Wu ; Kishk, Ahmed A. ; Glisson, Allen W.
Author_Institution :
Univ. of Mississippi, Mississippi
Volume :
55
Issue :
11
fYear :
2007
Firstpage :
3191
Lastpage :
3198
Abstract :
A transmission line (TL) method was proposed to compute the far-field radiation of Hertzian dipoles in a multilayer dielectric structure previously. This method is generalized here to deal with a structure embedded with perfectly electric conducting (PEC) strip interfaces. The problem is solved by analyzing an equivalent network, where each PEC strip interface is mapped into a four-port network, and each dielectric layer is mapped into two two-port networks for transverse electric (TE) and transverse magnetic (TM) modes. The S matrix of a four-port network is obtained analytically by applying the asymptotic boundary conditions. As an application, the PEC strip interfaces are used to reduce the cross polarization or rotate the polarization of a dielectric resonator antenna (DRA). In addition, the TL method is valid for a structure with any type of homogeneous and reciprocal layers whose S matrices are known. It is also able to solve two kinds of problems which cannot be done by a full-wave analysis equipped with a periodic boundary condition. Furthermore, the investigation of the system matrix singularity helps us to avoid the cavity mode in designing a radiating structure.
Keywords :
S-matrix theory; antenna radiation patterns; dielectric resonator antennas; dipole antennas; electromagnetic wave polarisation; transmission line matrix methods; two-port networks; S matrix; arbitrary Hertzian dipole; asymptotic boundary condition; cross polarization; dielectric resonator antenna; equivalent network analysis; far-field radiation; four-port network; homogeneous layer; multilayer dielectric structure embedded; perfect electric conducting strip interface; reciprocal layer; transmission line method; transverse electric mode; transverse magnetic mode; two-port networks; Boundary conditions; Computer interfaces; Dielectrics; Embedded computing; Magnetic analysis; Nonhomogeneous media; Polarization; Strips; Transmission line matrix methods; Transmission lines; Antenna radiation patterns; conducting strips; multilayers; periodic structure; transmission lines (TLs);
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2007.908836
Filename :
4380592
Link To Document :
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