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IEE Colloquium on Active and Passive Components for Phased Array Systems

24 Apr 1992

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Displaying Results 1 - 13 of 13
  • Monolithic five-bit phase shifter for Artemis space application

    Publication Year: 1992, Page(s):10/1 - 10/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    This paper reports on the design, production and characterisation of a five-bit MMIC switched filter phase shifter for 2.2-2.3 GHz inter-orbital communications. The presented measurements demonstrate the consistence of chip to chip performance achievable from a well controlled foundry process. This is particularly important in phased array applications where a large number of chips are utilised in... View full abstract»

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  • IEE Colloquium on `Active and Passive Components for Phased Array Systems' (Digest No.097)

    Publication Year: 1992
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (20 KB)

    The following topics were dealt with: phased array system modulators, phase shifters, beamformers, down-convertors, vector generators, circulators and modules View full abstract»

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  • The critical power level of S-band ferrite phase shifters at high duty cycles

    Publication Year: 1992, Page(s):9/1 - 9/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    The insertion loss behaviour of an S-Band phase shifter is presented, operating at peak and average power levels in excess of 25 kW and 1000 W respectively. The results indicated that when operating at large average power levels, minimising the power dissipation within the toroid while complying with the peak power specification is paramount. Careful selection of the ferrite toroid material and it... View full abstract»

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  • T/R module MMIC components for spaceborne SAR

    Publication Year: 1992, Page(s):12/1 - 12/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    The advanced synthetic aperture radar has been adopted for use on POEM-1 with a scheduled launch date of 1998. Each of the 320 T/R modules is required to meet stringent specifications in terms of size, mass, power consumption and overall electrical performance. This has facilitated the widespread use of GaAs MMIC technologies within the module. The project has also pioneered the use of new all-cer... View full abstract»

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  • Multi-channel vector generator system

    Publication Year: 1992, Page(s):7/1 - 7/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    The system described provides accurate and continuous analogue control of the phases and amplitudes of HF and microwave signals in multichannel systems for plasma heating in the Joint European Torus (JET) nuclear fusion experiment. Two RF systems are employed: one at 25-55 MHz couples energy into the plasma via the ions in its core (Ion Cyclotron Resonance Heating), and the 3.7 GHz Lower Hybrid Cu... View full abstract»

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  • A digitally beamformed phased array receiver for tactical bistatic radar

    Publication Year: 1992, Page(s):11/1 - 11/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (148 KB)

    Bistatic radar differs from the more conventional monostatic radar in having the transmitter and receiver sites physically separated. This paper describes a digitally beamformed phased array radar receiver demonstrator designed to be used as part of a short range bistatic radar system. The design is described with particular emphasis on the digital beamformer View full abstract»

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  • Novel circulator configurations with possible applications in phased arrays

    Publication Year: 1992, Page(s):8/1 - 8/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (180 KB)

    The predicted and experimental performances of a variety of types of circulator are presented for 18-40 GHz and 94 GHz. Asymmetrical and FCS circulators are described. The computer-aided design of ferrite circulators for phased arrays is encouraged View full abstract»

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  • Wideband modulator for high switching speed frequency synthesiser

    Publication Year: 1992, Page(s):1/1 - 1/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    This paper describes a single sideband suppressed carrier modulator intended to produce fine frequency stepping on the output of a broadband synthesiser, operating from below 1 GHz to greater than 5 GHz. The digitally synthesised local oscillator in the 100-200 MHz range is in principle also capable of working broadband. The modulator consists of a 90° coupler, a hybrid of 5 GaAs MMICs and a S... View full abstract»

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  • High power ferrite phase shifters for phased array radars

    Publication Year: 1992, Page(s):2/1 - 2/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    The criteria for selecting the nonreciprocal toroid phase shifter over its major competitors, the dual-mode ferrite phase shifter and the rotary field phase shifter, are given. The paper describes the nonreciprocal ferrite phase shifter from a design point of view and addresses the calibration and testing procedures required for optimum performance. The key factors and considerations influencing t... View full abstract»

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  • Modelling high power planar beamformers for phased arrays

    Publication Year: 1992, Page(s):3/1 - 3/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (136 KB)

    The design and manufacture of high power planar beamforming networks employing thick machined copper or aluminium stripline supported on discrete supports have historically been difficult, and it was not unusual to encounter several hardware design iterations before design specifications were met. This paper describes some aspects of development work to improve the design and manufacturability of ... View full abstract»

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  • Single chip MMIC downconvertors

    Publication Year: 1992, Page(s):4/1 - 4/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    This paper describes a family of downconvertors originally designed for DBS applications. The usable RF frequencies are discrete bands within the 10.95-12.75 GHz range. The IF output is 0.95-1.7 GHz for all bands. An on-chip local oscillator is stabilised by an external dielectric resonator. The circuits are completely RF-On-Wafer testable by injection of a synthesised local oscillator signal into... View full abstract»

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  • Cost engineering active phased array modules

    Publication Year: 1992, Page(s):5/1 - 5/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    This paper describes some of the activities currently addressed in order to minimise the cost of manufacturing modules for use in phased array systems. Synergies between existing low cost commercial civil manufacturing practices and military requirements are described within the context of the Siemens group View full abstract»

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  • High power, precision beamforming networks for radar phased arrays

    Publication Year: 1992, Page(s):6/1 - 6/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    A suite of software permits rigorous analysis of waveguide branch guide couplers and derivation of the complete scattering matrices of multiport power dividers incorporating these couplers and including other waveguide components such as bends. This is used in conjunction with a design procedure which can achieve a nominally frequency invariant output distribution over a wide bandwidth using coupl... View full abstract»

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