IEE Proceedings H (Microwaves, Antennas and Propagation)
Online ISSN
2053-907X
Print ISSN 0950-107X
Print ISSN 0950-107X
Published from 1985-1993, IEE Proceedings H contained significant and original contributions on microwaves, antenna engineering and radiowave propagation.
This journal was previously known as IEE Proceedings H (Microwaves, Optics and Antennas) 1980-1984. ISSN 0143-7097. more..
This publication is continued by IEE Proceedings - Microwaves, Antennas and Propagation 1994-2006. ISSN 1350-2417. more..
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Latest content
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Characteristic mode analysis off electromagnetic coupling through multiple slots in a conducting plane
- Author(s): A. El-Hajj ; K.Y. Kabalan ; R.F. Harrington
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p.
421
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The problem of electromagnetic coupling through slots in a conducting plane is studied using characteristic-mode theory; i.e. the problem is formulated as an operator equation whose solution determines the characteristic modes of the problem. The cases treated are those when the plane is excited by either a transverse electric (TE) or a transverse magnetic (TM) plane waves with different angles of incidence. It is assumed that the media to the right and to the left of the plane exhibit different electromagnetic properties. Where comparison is possible, there is a good agreement with classical results. The computer program is described briefly, and representative examples are given.
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Synthesis of series STUB-R complex gyrator circuits using halfwave long impedance transformers
- Author(s): R. Levy and J. Helszajn
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p.
426
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The complex shunt STUB-G circuits met in the practice of three-port circulators may be matched using one eight-wave long alternate lines or quarter wave long impedance transformers. Another possibility is to employ halfwave long UEs at the characteristic planes of the junction where the complex gyrator circuit is a series STUB-R network. Although this topology is not particularly compact the impedance levels met in this solution are appropriate for the matching of junction circulators with high Q complex gyrator loads. This paper gives the synthesis of this problem in the case of a single halfwave long UE.
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Low loss quasitransversal microwave filters with specified amplitude and phase characteristics
- Author(s): F. Huang
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p.
433
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A microwave filter synthesis procedure for almost arbitrary phase and amplitude responses is described. Although based on a passive transversal filter implementation, it contains an efficient numerical algorithm to allow for losses in the delay line and multiple reflections between taps; this permits large amounts of energy to be drawn from the delay line so that the filter can have reasonably low loss. The performance of chirp filters and a phase shifter implemented in copper stripline and microstrip are presented as a demonstration. A fractional bandwidth of 150% has been achieved for the chirp; this is about double that produced by previous design methods. It is intended that eventual implementations will include superconducting linear phase filters, chirp devices and amplitude or phase equalisers.
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Original multilayer microstrip disc antenna for dual-frequency band operation: theory and experiment
- Author(s): J. Bennegueouche ; J.P. Damiano ; A. Papiernik
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p.
441
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Dual-frequency microstrip antennas are expected to find applications in mobile satellite communications. The authors present a multiplayer microstrip structure with a radiating disc. Theoretical results are compared with experiment. Input impedance and mutual coupling between the two feeds are discussed.
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Some recent developments in circular overmoded waveguide
- Author(s): W.A. Huting ; J.W. Warren ; J.A. Krill
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p.
447
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Progress is described in the theoretical modelling, design and testing of overmoded circular TE01 mode waveguide applicable to high power, low loss transmission in the microwave and lower millimetre wave bands. Theoretical techniques, originally developed to model low loss millimetre band waveguide for commercial telecommunications, have been adapted to overmoded sheathed-helix waveguide (with continuous unwanted-mode suppression) subject to new constraints of tighter bend radius relative to the wavelength, high power and significantly less overmoding. Numerical design analysis using coupled mode theory has yielded helix waveguide designs which have been experimentally verified.
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