2002 International Telecommunications Symposium

"A numerical code based on the Finite Element Method (FEM) was developed to solve the ridged waveguide eigenvalue problem. In order to apply the FEM, the Galerkin Weak Formulation was used. The solution is obtained by using the Finite Element Method with quadratic triangular shape functions. The eigenvalue spectrum of the single and double rectangular...

"Fast advance of Array Antenna research ensures its role as a key technology for future cellular systems [1,2]. However, most Smart Antenna techniques are restricted by the assumption that the number of signals is smaller than the array, although cost limits them to small sizes and researches indicate that usual path-distributions do not satisfy such...

"This paper presents a procedure to design passive waveguide components taking into account the presence of complementary modes in the formulation. The algorithm, based on the Boundary Element Method (BEM), solves the wave equation for each discontinuity plane using two different formulations (TE and TM). The complete waveguide structure is obtained by...

"This work describes a monolithic integrated active mixer in a pre-production 0.4 \u00b5m SiGe bipolar technology. The 3 dB bandwidth is in the frequency range between 14 and 38 GHz with gain higher than 14 dB. At 38 GHz the circuit has a 3rd order intercept point of 19.3 dBm referred to the output. The mixer may be used for future broadband wireless...

"The theory and numeric results of the Double Layer Patch Resonator (DLPR) about resonant frequency, efficiency and bandwidth are presented. The full wave Transversal Transmission Line (TTL) method has been used for analysis. Starting from the Maxwell equations, a system that represents the electromagnetic fields are obtained, according with this concise...

"The direct and efficient Transverse Transmission Line (TTL) method is used to analyse the unilateral fin-line resonators. This method in conjunction with the Galerkin\u2019s procedure and Parseval\u2019s relation are applied to obtaining a homogeneous equation system with two variables. The determinant of this system gives the complex resonance...

"The use of photonic crystals is important in the theory concerning electromagnetic and optical propagation. The theory of Photonic Bandgap-PBG was first developed for lightwaves and it\u2019s fairly applicable for centimeter and millimeter waves. The presence of photonic materials as substrates of planar antennas yields some desirable features such as...

"For the microstrip patch resonator, as a planar antenna of a microstrip, a set of equations that represents the electromagnetic fields in the x and z direction as function of the electric field in the y direction are obtained applying the TTL method. This method is very suitable at microwave and antenna applications, and gives accurate complex resonant...

"An efficient finite-element vector beam propagation formulation for dielectric media with transverse anisotropy is thoroughly presented. This formulation is expressed in terms of the magnetic field\u2019s transverse components and includes perfectly matched layers (PML) at the truncated boundaries and the wide angle Pad\u00e9 approach."

"A monolithically integrated microstrip waveguide in a 0.5 \u00b5m, Si bipolar technology is presented. This single microstrip line is a common type of on chip interconnnect. The waveguide is characterized by S-parameter measurement in a frequency range from 100 MHz to 80 GHz. After deembedding the characteristic impedance, propagation constant and...