By Topic

IEE Proceedings H - Microwaves, Antennas and Propagation

Issue 3 • June 1985

Filter Results

Displaying Results 1 - 11 of 11
  • Theory of the grating coupler for a grounded-dielectric-slab waveguide

    Publication Year: 1985, Page(s):149 - 156
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (929 KB)

    The characteristics of the output and input couplers for a dielectric-slab waveguide grounded by a corrugated-conducting surface are investigated for the transverse electric mode, taking into account the small gain or loss in the dielectric. A pair of canonical equations valid for a distributed coupler with a guided wave, an incident wave and a radiated wave are derived, and all the coupling coeff... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Upper and lower bounds on mode capacitances for a large class of anisotropic multilayered microstrip-like transmission lines

    Publication Year: 1985, Page(s):157 - 163
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (675 KB)

    In the paper, a simple recurrence formula to obtain the Green's function for multilayered anisotropic structures, with rectangular boundary conditions involving electric and magnetic walls and open boundaries, allows us to present an unified variational approach in the spectral domain to find both upper and lower bounds on the mode capacitances of a large class of planar transmission structures. V... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Circular-electric-mode hybrid coupler

    Publication Year: 1985, Page(s):164 - 170
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (723 KB)

    The circular-electric-mode hybrid coupler permits electromagnetic energy to be transferred from a circular waveguide, which supports a TE01 mode, to a coaxial waveguide also supporting a TE01 mode, or vice versa. The extent to which this transference occurs is controlled by a cylindrical-waveguide `drift¿¿ region, which supports both a TE01 and a TE02 mode. The coupling mechanism is closely analog... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimation of the characteristic impedance of a transmission line by variational methods

    Publication Year: 1985, Page(s):171 - 175
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (502 KB)

    A large number of field problems cannot be solved exactly. Instead, an approximate solution is obtained by computation. The object of the paper is to draw attention to a method which gives an upper and a lower bound for the exact solution. The method, based on the fact that the basic equations of electromagnetism can be derived from a variational principle, is applicable to a variety of problems h... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Plane-wave illumination of concentric-ring frequency-selective surfaces

    Publication Year: 1985, Page(s):176 - 180
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (503 KB)

    In the paper we present the results of a modal analysis of the current distribution around the circumference of thin concentric rings arranged on both square and equilateral triangular lattices. The particular case of plane-wave illumination at 45¿¿ incidence is considered owing to its relevance to oblique-incidence diplexer systems. Measured and predicted transmission curves, together with comput... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Antenna pattern degradation due to tower guy wires on microwave radio systems

    Publication Year: 1985, Page(s):181 - 188
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (933 KB)

    With economical factors favouring the use of guyed structures for terrestrial microwave radio system towers of heights above 40 to 50 metres, situations are arising where information on antenna-pattern degradation due to guy wire scattering is required for route-design purposes. A qualitative understanding can be gained of the worst-case situations, where the wire runs near to, and directly in fro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Near-field power transfer effects in small electromagnetic applicators for inducing hyperthermia

    Publication Year: 1985, Page(s):189 - 197
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1003 KB)

    The action of electromagnetic applicators in hyperthermic cancer therapy is investigated, with specific reference to invasive wire probes and noninvasive slots, along with their ability to heat biological tissue at depth without creating unwanted hot spots. An analysis based on spherical eigenfunctions enables useful probe configurations to be analysed and the field penetration depth calculated as... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A spectral iteration technique for the analysis of Yagi-Uda arrays

    Publication Year: 1985, Page(s):198 - 202
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB)

    The paper presents a spectral iteration technique for the analysis of linear arrays of unequally spaced dipoles of unequal lengths. As an example, the Yagi-Uda array is considered for illustration. Analysis is carried out in both the spatial as well as the spectral domains, the two being linked by the Fourier transform. The fast Fourier transform algorithm is employed to obtain an iterative soluti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Coaxial waveguide to circular cylindrical waveguide junction

    Publication Year: 1985, Page(s):203 - 206
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    The abrupt junction between a coaxial waveguide with hollow inner and a cylindrical waveguide has previously been analysed using a moment method for the case where the hollow inner has an infinitesimally thin wall. The paper describes modifications which permit a wall of finite thickness to be accommodated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Phase centre of small primary feeds and its effects on the feed performance

    Publication Year: 1985, Page(s):207 - 214
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (879 KB)

    For small primary feeds the radiation field is determined numerically, using an integral-equation formulation for the surface currents and its solution by a moment method. The computed fields are used to determine the feed-phase centres, as defined to minimise the phase variation of the field over a selected angular region, or to maximise the reflector gain factor. Both circular and coaxial wavegu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Technical memorandum. Dual-mode horns at millimetre and submillimetre wavelengths

    Publication Year: 1985, Page(s):215 - 218
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (253 KB)

    Dual-mode horns have been built and tested at 230 GHz and in the range 460¿¿510 GHz. In particular, attention has been paid to the phase difference between the two modes, resulting in horns that have good Gaussian beams for use in quasioptical systems, and a usable bandwidth of more than 6% at the higher frequency. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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

Full Aims & Scope