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Radio and Electronic Engineer

Issue 1.2 • Date January-February 1978

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Displaying Results 1 - 13 of 13
  • Advances in microwave integrated circuits

    Publication Year: 1978 , Page(s): 1 - 2
    Save to Project icon | PDF file iconPDF (233 KB)  
    Freely Available from IEEE
  • Review of some microwave integrated circuit components utilizing microstrip techniques

    Publication Year: 1978
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1731 KB)  

    This paper briefly reviews some of the techniques involved in realizing the practical microwave integrated circuit for systems applications. The main technological considerations and their application to advanced receiver sub-systems are discussed with emphasis on superheterodyne operation. View full abstract»

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  • Ageing tests on microwave integrated circuits

    Publication Year: 1978 , Page(s): 13 - 22
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1783 KB)  

    The study of failure mechanisms in microwave integrated circuits (m.i.c.s) provides essential information on the ageing behaviour of substrate-layer combinations. The ageing behaviour depends on the structure and the chemical composition of the substrate-layer combinations as well as on the ambient conditions. Tests on microwave properties, d.c. resistivity, adhesion as well as structure analysis ... View full abstract»

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  • Modular construction of low-noise multi-stage f.e.t. amplifiers

    Publication Year: 1978 , Page(s): 23 - 28
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (827 KB)  

    A new amplifier modular structure has been developed to realize a 30 dB gain multi-stage f.e.t. amplifier for radar applications. Since the overall gain needed was very high, a multi-stage approach had to be adopted. Matched inputs and outputs of 50¿ were employed for each stage in order that individual stages could be characterized separately and adjusted if necessary. The cascading problem of t... View full abstract»

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  • Broadband microwave frequency doublers

    Publication Year: 1978 , Page(s): 29 - 32
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (535 KB)  

    The paper describes the design and the performance of a frequency doubler, realized in hybrid m.i.c.-technique, which generates microwave power over the whole of K-band (18¿26 GHz). The conversion efficiency is approximately 10% for input power levels from 5 to 50 mW. Limiting effects occur at levels above 50 mW and depend on the frequency. The second part of the paper describes a design concept ... View full abstract»

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  • A versatile solid-state mic source module for Ku-band

    Publication Year: 1978 , Page(s): 33 - 37
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (684 KB)  

    A phase-locked-loop approach has been adopted in order to realize a Ku-band transferred electron source with good power, stability and operational bandwidth. By arranging to interface with a u.h.f. reference, namely one of the new generation surface acoustic wave oscillators, the multiplier is simplified and the whole of the microwave circuit can be configured on a single compact m.i.c. The proble... View full abstract»

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  • X-band microwave integrated circuits using slotline and coplanar waveguide

    Publication Year: 1978 , Page(s): 38 - 42
    Cited by:  Papers (19)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (985 KB)  

    Experimental results are given for propagation in a selection of slotline and coplanar geometries. Examples are given of X-band planar circuits incorporating semiconductors including balanced mixers, and p-i-n-diode switches and attenuators. Finally, an example of how slotline dipoles may be used to produce a simple aerial array is presented. View full abstract»

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  • The production of microwave integrated circuits by laser machining

    Publication Year: 1978 , Page(s): 43 - 46
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (536 KB)  

    This paper discusses laser machining as an alternative to photolithography for the production of m.i.c.s. A complete equipment is described comprising a laser with computer-controlled XY table moving a prepared substrate through the laser beam. The procedure to transfer the design sketch of a microwave circuit into a finished substrate is described together with some results. View full abstract»

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  • Prospects for GaAs mosfet integration

    Publication Year: 1978 , Page(s): 47 - 52
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (713 KB)  

    Microwave integration has so far been pursued with Schottky gate f.e.t.s where difficulties however exist with : (1) the Schottky contact which must not be biased strongly in forward direction without danger of damaging it, (2) the high d.c. standby power dissipated as compared with normally-off digital transistors with reasonably large signal levels which are unfortunately not possible with m.e.s... View full abstract»

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  • Design of stepped microstrip components

    Publication Year: 1978 , Page(s): 53 - 63
    Cited by:  Papers (11)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1042 KB)  

    The analysis of the impedance step by the mode matching procedure using a waveguide model for the microstrip line yields an explicit design formula for the frequency-dependent equivalent series inductance. The single-section quarter-wavelength transformer is calculated under the assumption of interacting steps. It turns out that in regard to practical design the neighbouring steps can be considere... View full abstract»

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  • Techniques for investigating spurious propagation in enclosed microstrip

    Publication Year: 1978 , Page(s): 64 - 72
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (900 KB)  

    The effects of discontinuities and consequent spurious propagation in enclosed microstrip have been studied using 10:1 scaled models by probing the vertical component of the electric field in the substrate and by measuring insertion loss. A number of discontinuities were studied and the results showed the higher-order modes excited in the enclosed microstrip to be perturbed versions of the LSM and... View full abstract»

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  • Theoretical and experimental methods for evaluating discontinuities in microstrip

    Publication Year: 1978 , Page(s): 73 - 84
    Cited by:  Papers (9)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1243 KB)  

    Microwave circuits generally include a number of junctions and discontinuities at the interconnection of the various circuit limits and the resulting parasitic reactances can have a major effect on the circuit operation. The designer of waveguide and coaxial circuits has had available, for many years, a wealth of information on the parasitic reactances associated with the circuit elements and disc... View full abstract»

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  • Computer-aided design of microwave integrated circuits

    Publication Year: 1978 , Page(s): 85 - 88
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (457 KB)  

    This paper describes how an analysis/optimization program in current use may be adapted for the design of m.i.c.s. The optimization routine combines two different strategies to reduce the execution time and increase the accuracy of approach to the true minimum. The analysis routine incorporates an algorithm for junction parasitics, dispersion, conductor and dielectric loss in the microstrip lines.... View full abstract»

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