# IEE Proceedings H - Microwaves, Antennas and Propagation

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Displaying Results 1 - 14 of 14
• ### Propagation characteristics of rectangular corrugated waveguides

Publication Year: 1985, Page(s):413 - 418
Cited by:  Papers (2)
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The propagation characteristics of guided waves in a rectangular waveguide with transverse corrugations on all four walls is investigated both theoretically and experimentally. The theoretical solution obtained is an improvement on an earlier analysis, providing a basis for the assumption that the corrugated side walls of the guide act, very approximately, like a smooth metal-walled guide. It is a... View full abstract»

• ### A load-pull technique for the determination of transistor S parameters under large-signal conditions

Publication Year: 1985, Page(s):419 - 423
| | PDF (501 KB)

A novel method is presented for determining the large single S parameters of transistors under drive conditions using data obtained from load-pull measurements. The technique uses a load which can have a variable amplitude and phase, and can thus control the amplitude and phase of the signal at the device output. A mathematical analysis of the method is presented and typical results for the large-... View full abstract»

• ### General integral equation formulation for microstrip antennas and scatterers

Publication Year: 1985, Page(s):424 - 432
Cited by:  Papers (119)
| | PDF (1079 KB)

The paper deals with the dynamic analysis of microstrip structures. It is shown that the mixed-potential integral equation for stratified media, which was introduced in a previous publication, provides a rigorous and powerful approach. The Green's functions belonging to the kernel of the integral equation are expressed as Sommerfeld integrals, in which surface wave effects are automatically includ... View full abstract»

• ### Radiation characteristics and polarisation of undulated microstrip line antennas

Publication Year: 1985, Page(s):433 - 439
Cited by:  Papers (2)
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A numerical method is used to investigate the radiation from undulated microstrip line antennas. The undulated line is assumed to be suspended over a ground plane and its current distribution is determined using a moment method type solution. This current distribution is then used to compute the co-polar and cross-polar radiation fields. It is found that the current distribution has an oscillating... View full abstract»

• ### Effect of common volume models on bistatic scattering and interference calculations

Publication Year: 1985, Page(s):440 - 446
| | PDF (700 KB)

The study of interference due to scattering by hydrometeors within the common volume of two antenna beams, has centred previously on the scattering characteristics of the hydrometeors. Little attention has been paid to the nature of the common volume and its modelling, which can have order of magnitude effects on the magnitude of the interfering signal in extreme cases. The paper compares two exis... View full abstract»

• ### Design and validation of a corrective subreflector for a 13.7 m antenna by microwave holography

Publication Year: 1985, Page(s):447 - 450
| | PDF (484 KB)

An RF holographic technique was deployed as a diagnostic aid to ascertain whether the frequency range of an existing antenna could be increased. A simple economical subreflector was subsequently built to compensate for the observed astigmatism. A further holographic test was carried out to align the new subreflector, and the new antenna now operates satisfactorily in the 11 GHz band in Cassegrain ... View full abstract»

• ### Array pattern synthesis by the method of alternating orthogonal projections: the general case

Publication Year: 1985, Page(s):451 - 454
Cited by:  Papers (1)
| | PDF (508 KB)

In the paper, the method of alternating orthogonal projections is derived for the problem of array pattern synthesis with multiple null constraints. The required complex weight vector is obtained via an iterative algorithm starting from the known look direction¿¿. The projection operators required in the algorithm are shown to be easily computed from the look direction¿¿ vector and the null-cons... View full abstract»

• ### Theory and experiment on microstrip antennas with airgaps

Publication Year: 1985, Page(s):455 - 460
Cited by:  Papers (29)
| | PDF (676 KB)

In a microstrip antenna, the resonant frequency of a particular mode is determined by the shape and size of the conducting patch, the relative permittivity of the substrate and, to some extent, the thickness of the substrate. If the resonant frequency is to be changed, a new antenna is usually needed. Recently, Lee and Dahele have shown that the resonant frequencies of microstrip antennas can be c... View full abstract»

• ### Towards an algorithm for dielectric-edge diffraction coefficients

Publication Year: 1985, Page(s):461 - 467
Cited by:  Papers (1)
| | PDF (851 KB)

General penetrable-edge conditions are derived from a new approach to diffraction by a dielectric wedge. The increased computational efficiency, to be expected from satisfying these edge conditions explicitly, is illustrated with numerical evaluations of the surface fields on wedge cylinders, and by comparison of measured and computed resonant frequencies of cylindrical cavities loaded with dielec... View full abstract»

• ### Calibration of multiport reflectometers

Publication Year: 1985, Page(s):468 - 470
Cited by:  Papers (9)
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The paper describes a calibration technique for multiport reflectometers using only four different short-circuit terminations and a matched load. The calibration constants that are evaluated are the constants associated with the bilinear relationship which holds between the waves at the relevant measurement ports. View full abstract»

• ### A new technique for absolute temperature compensation of tunable resonant cavities

Publication Year: 1985, Page(s):471 - 473
| | PDF (302 KB)

The paper describes a cheap method for absolute temperature compensation of a tunable resonant cavity which exhibits linearity in tuning, at least over a narrow but useful frequency range, and for which a linear law relates the frequency change to the temperature change of at least 30¿¿C around the reference temperature. The technique considers compensated resonant cavities constructed from common... View full abstract»

• ### Analysis of slot antenna on dielectric substrate

Publication Year: 1985, Page(s):474 - 476
Cited by:  Papers (3)
| | PDF (350 KB)

A simple method is described for analysis of a slot antenna on dielectric substrate of finite thickness. The method consists in using several transformations for reducing the original structure to approximately complementary/dual structure; i.e. to a cylindrical dipole of circular cross-section with a coaxial magnetic cover. The structure thus obtained is then analysed using well-known methods. A ... View full abstract»

• ### Propagation and radiation behaviour of a longitudinally slotted horn with dielectric-filled slots

Publication Year: 1985, Page(s):477 - 479
Cited by:  Papers (15)
| | PDF (305 KB)

It is proposed that the slots of a longitudinally slotted horn be filled with a dielectric material. This is shown to considerably reduce the required slot depths for achieving low crosspolarisation; thus more feasible and economic design of such a horn is possible. Design curves for the modal propagation constants of the first two modes against the frequency, the dielectric constant of the slot f... View full abstract»

• ### IEE Conference Publication 248 ICAP 85

Publication Year: 1985, Page(s):480 - 482
| | PDF (386 KB)

First Page of the Article
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## Aims & Scope

Published from 1985-1993, IEE Proceedings H contained significant and original contributions on microwaves, antenna engineering and radiowave propagation.

Full Aims & Scope