# IEE Proceedings - Microwaves, Antennas and Propagation

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Displaying Results 1 - 13 of 13
• ### Application of the transmission line matrix method to the analysis of scattering by three-dimensional objects

Publication Year: 1995, Page(s):319 - 325
Cited by:  Papers (2)
| |PDF (508 KB)

The transmission line matrix (TLM) method is applied to the analysis of electromagnetic scattering from finite-sized conducting and dielectric objects. The TLM method is a general numerical method for obtaining an approximate solution to the time-dependent form of Maxwell's equations in the presence of geometrically complex environments. The three-dimensional symmetrical-condensed TLM node togethe... View full abstract»

• ### Electromagnetic boundary conditions and differential forms

Publication Year: 1995, Page(s):326 - 332
Cited by:  Papers (6)  |  Patents (1)
| |PDF (480 KB)

A new representation for electromagnetic boundary conditions involving a boundary projection operator defined using the interior and exterior products of the calculus of differential forms is developed. This operator expresses boundary conditions for fields represented by differential forms of arbitrary degree. With vector analysis, the field intensity boundary conditions require the cross product... View full abstract»

• ### Single-cavity abreast two-device power combiner

Publication Year: 1995, Page(s):333 - 338
| |PDF (252 KB)

The theory and experiment of a millimetre wave single-cavity abreast two-device power combiner are studied. The external circuit impedance looking outside from the two active devices, which are abreast-mounted in the rectangular waveguide cavity, are analysed and computed for the first time. Numerical results are given, which are very useful for the design and development of millimetre wave power ... View full abstract»

• ### Study of path inclination effects on performance of LOS microwave links in southern India

Publication Year: 1995, Page(s):295 - 299
| |PDF (292 KB)

Investigations of the effect of path inclination on fading, based on the data collected from three line-of-sight (LOS) microwave links over the Indian subcontinent, are reported. It is observed that as the path inclination increases, the number and depth of fades caused by layers are reduced. In regions where temperature inversions prevail for a considerable percentage of the time, the design of L... View full abstract»

• ### Experimental investigation of the post mount' structure in waveguide-type SIS mixers

Publication Year: 1995, Page(s):339 - 344
| |PDF (392 KB)

A x70 scale model for a W-band waveguide-type SIS mixer mount has been fabricated and employed to investigate the post mount' structure, that is, a planar structure (on the quartz substrate) located in the waveguide for mounting an SIS junction (array). To collect accurate impedance data for the simulation of the equivalent circuit model of the `post mount', a novel measurement technique is propo... View full abstract»

• ### Cylindrical rectangular microstrip antennas with coplanar parasitic patches

Publication Year: 1995, Page(s):300 - 306
Cited by:  Papers (13)
| |PDF (340 KB)

The effect of coplanar parasitic patches on the input impedance and far-field pattern of probe-fed cylindrical rectangular microstrip antennas is presented. The parasitic patches are coupled parallel to either the radiating edges or nonradiating edges of the driven patch. Applying the boundary condition on the surface of the patches, coupled integral equations are formulated. The equations involve... View full abstract»

• ### Design of integrated waveguide twist components

Publication Year: 1995, Page(s):345 - 349
Cited by:  Papers (2)
| |PDF (288 KB)

Design guidelines for single and cascaded rectangular twist components for applications in integrated waveguide technology are introduced. The structures are readily machinable by modern CNC machines. Three different design variants are developed covering twists for the lower, medium and upper frequency range of a waveguide band. Individual 90 degree twist sections are extremely short and, therefo... View full abstract»

• ### Verification of spatial domain integral-equation analysis of microstrip wire-grid arrays

Publication Year: 1995, Page(s):314 - 318
Cited by:  Papers (2)
| |PDF (260 KB)

An integral-equation moment technique is applied to the microstrip wire grid array geometry. Computed radiation pattern results are compared with measurements, giving acceptable agreement between the two. Computed current distributions support earlier intuitive reasoning used in devising this type of antenna View full abstract»

• ### Frequency characteristics and bandwidth enhancement of artificially soft and hard surfaces

Publication Year: 1995, Page(s):289 - 294
Cited by:  Papers (5)
| |PDF (356 KB)

The bandwidth of reflection coefficients are evaluated for the conducting strips on a grounded dielectric and magnetic slab for the use as artificially soft and hard surfaces. The closed-form reflection coefficients developed are utilised in parameter study. The hard surface realised by magnetic material slab has significantly wider bandwidth than that realised by dielectric material slab. For a p... View full abstract»

• ### Performance of the LSBRM using efficient weighting functions for planar structures

Publication Year: 1995, Page(s):364 - 368
Cited by:  Papers (6)
| |PDF (268 KB)

A new variant of the least squares boundary residual method (LSBRM) is presented, which takes into account electromagnetic field singularities at metal-dielectric edge due to the existence of the Gibbs phenomenon. Systematic weighting functions are used in this method allowing one to obtain accurate and efficient numerical results with accelerated convergence. The structure to be analysed is enclo... View full abstract»

• ### Resonance properties of cylindrical rectangular patch with composite ground plane

Publication Year: 1995, Page(s):307 - 313
Cited by:  Papers (1)
| |PDF (328 KB)

Resonance characteristics of cylindrical-rectangular patch resonator in the presence of a laminated ground plane are studied. The laminated ground is modelled by a cascaded transition matrix in the spectral domain. An integral equation is formulated in terms of the surface current on the patch. Galerkin's method is then applied to solve for the resonance frequency. Factors analysed include substra... View full abstract»

• ### Modified spectral-domain approach for microstrip lines with finite metallisation thickness and conductivity

Publication Year: 1995, Page(s):357 - 363
Cited by:  Papers (2)
| |PDF (428 KB)

A modified spectral-domain approach is proposed for an analysis of the microstrip line whose signal strip and ground plane have finite thickness and conductivity. To improve the accuracy of the results, all three components of the strip current which have three-dimensional dependence are included in the analysis. With the basis functions properly chosen, this new approach can be treated as easily ... View full abstract»

• ### Evaluation of cut-off frequencies of higher order modes in eccentric coaxial line

Publication Year: 1995, Page(s):350 - 356
Cited by:  Papers (2)
| |PDF (344 KB)

The paper presents a method of evaluation of the cut-off frequencies of higher order modes of transmission lines having eccentric annular cross-section using a combination of conformal transformation and the method of finite difference. The Laplacian operator appearing in the weighted Helmholtz equation resulting from the conformal transformation is represented as a five-point difference operator ... View full abstract»

## Aims & Scope

IET Microwaves, Antennas & Propagation is dedicated to coverage of microwave and RF circuits; microwave and millimetre wave amplifiers; oscillators, switches, mixers and other components.

Full Aims & Scope