Showing papers on "Microstrip published in 1973"
TL;DR: In this article, the boundary value problem associated with the open microstrip line structure is formulated in terms of a rigorous, hybird-mode representation, and the resulting equations are subsequently transformed, via the application of Galerkin's method in the spectral domain, to yield a characteristic equation for the dispersion properties of the OML line.
Abstract: The boundary value problem associated with the open microstrip line structure is formulated in terms of a rigorous, hybird-mode representation The resulting equations are subsequently transformed, via the application of Galerkin's method in the spectral domain, to yield a characteristic equation for the dispersion properties of the open microstrip line Numerical results are included for several different structural parameters These are compared with other available data and with some experimental measurements
435 citations
TL;DR: The assumption that the quasi-TEM mode on microstrip is primarily a single longitudinal-section electric (LSE) mode leads to a transmission line model whose dispersion behavior can be analyzed and related to that of microstrip as mentioned in this paper.
Abstract: The assumption that the quasi-TEM mode on microstrip is primarily a single longitudinal-section electric (LSE) mode leads to a transmission line model whose dispersion behavior can be analyzed and related to that of microstrip. Appropriate approximations yield simple, closed-form expressions that allow slide-rule prediction of microstrip dispersion.
238 citations
TL;DR: In this article, a universal mode chart for the microstrip ring resonator based on a radial waveguide model is presented, where the resonant frequency is related to the width of the ring conductor.
Abstract: A universal mode chart for the microstrip ring resonator, based on a radial waveguide model, is presented. The resonant frequency is related to the width of the ring conductor. Experimental results from 4 to 16 GHz are shown to be in good agreement with the theory.
149 citations
TL;DR: The integral equations governing the electrostatics of the excess charge distribution near microstrip rightangle bends, T junctions, and crossings are formulated and subsequently solved by a projective method as mentioned in this paper.
Abstract: The integral equations governing the electrostatics of the excess charge distribution near microstrip rightangle bends, T junctions, and crossings are formulated and subsequently solved by a projective method. Extensive discontinuity capacitances are presented in graphical form. Where possible, the data are compared to the available experimental results.
107 citations
04 Jun 1973
TL;DR: Theoretical and experimental results as mentioned in this paper show that wide coupling lines and a smaller than usual disk radius can be used to obtain wideband operation in 3-port Y-junction microstrip circulators.
Abstract: Octave bandwidths are found to be readily obtainable in 3-port Y-junction microstrip circulators. Theoretical and experimental results are presented which show that wide coupling lines and a smaller than usual disk radius can be used to obtain wideband operation.
80 citations
Patent•
03 Dec 1973TL;DR: In this paper, a waveguide mode suppressing structure is disclosed which selectively suppresses the waveguide modes over a certain frequency range and also physically provides support for a dielectric substrate.
Abstract: If strip transmission lines are enclosed in a conducting shield, the shield acts as a waveguide and spurious waveguide modes, which interfere with stripline transmission, are excited. A waveguide mode suppressing structure is disclosed which selectively suppresses the waveguide modes over a certain frequency range and also physically provides support for a dielectric substrate. The structure has at least one groove, having an approximate electrical depth one-quarter of the wavelength of the stripline operating frequency, positioned in the shield side wall. This structure provides suppression without restricting cross sectional dimensions of the channel, thereby allowing more circuits on a substrate and greater freedom in strip transmission line circuit design than in the prior art. Additionally, at least one resistive thin film may be deposited on the dielectric substrate in the vicinity of the groove to increase suppression capability.
78 citations
01 Oct 1973
71 citations
TL;DR: In this article, a method for calculating the capacitance of a circular disk on a dielectric substrate backed by a ground plane is presented, where Hankel transforms and Galerkin's method are used to derive the expression for capacitance.
Abstract: A method for calculating the capacitance of a circular disk on a dielectric substrate backed by a ground plane is presented. Hankel transforms and Galerkin's method are used to derive the expression for the capacitance. Numerical results are compared with the experimental data and good agreement is reported.
51 citations
TL;DR: Schottky contact lines are a form of microstrip on a semiconducting substrate, the strip of which forms a rectifying metal-semiconductor contact as mentioned in this paper, and their extremely low phase velocity is determined by the ratio of the depletion region width to the substrate thickness.
Abstract: Schottky contact lines are a form of microstrip on a semiconducting substrate, the strip of which forms a rectifying metal–semiconductor contact. Such a line has an extremely low phase velocity that is determined by the ratio of the depletion-region width to the substrate thickness, i.e. by the bias. Measurements agree well with theoretical expressions that are deduced from a parallel-plate-waveguide model.
39 citations
04 Jun 1973
TL;DR: In this paper, the design and performance of frequency converters, solid-state sources, circulators and injection-locked amplifiers at millimeter wavelengths are described, as well as their application in millimeter-wave communication systems.
Abstract: Recent advances in microstrip circuit technology and solid-state device technology have resulted in hybrid integrated circuits which look attractive for use in millimeter-wave communication systems. This paper describes the design and performance of frequency converters, solid-state sources, circulators and injection-locked amplifiers at millimeter wavelengths.
38 citations
TL;DR: In this article, a 50/spl Omega/suspended stripline with a probe was built and tested at 30 GHz with a return loss better than 35 dB and matching was obtained between 28.8 and 32.6 GHz.
Abstract: A launcher for coupling a 50-/spl Omega/ suspended stripline to a waveguide by means of a probe has been built and tested at 30 GHz. Matching has been obtained between 28.8 and 32.6 GHz with a return loss better than 35 dB. The launcher can be fabricated as an integral part of the stripline components.
TL;DR: In this paper, the design of an octave-band (2.5-5.0-GHZ) switched-line diode phase shifter is described and an analysis showing the need for a choice of the shunt-diode switch configuration for broadband operation is presented.
Abstract: The design of an octave-band (2.5-5.0-GHZ) switched-line diode phase shifter is described. An analysis showing the need for a choice of the shunt-diode switch configuration for broad-band operation is presented. Curves of even- and odd-mode impedance of parallel coupled microstrip lines employed in Schiffman differential phase shifters are presented. The configuration and performance characteristics of the phase shifter are described,
01 Sep 1973
TL;DR: In this article, the authors proposed a conformai, thin antenna that would neither, disturb the aerodynamic flow, nor would it protrude inwardly to disrupt the mechanical structure.
Abstract: High velocity aircraft, missiles, and rockets require conformai, thin antennas. Ideally, an antenna "paper thin" would best suit the aerodynamic and mechanical engineer. This antenna would neither, disturb the aerodynamic flow, nor would it protrude inwardly to disrupt the mechanical structure.
TL;DR: In this article, a cavity test fixture was constructed and tested to experimentally demonstrate the capabilities of integrated finline, and the results were analyzed to determine the manner in which the guide wavelength and unloaded Q factor varied.
Abstract: To experimentally demonstrate the capabilities of integrated finline, a cavity test fixture was constructed and tested. The results were analysed to determine the manner in which the guide wavelength and unloaded Q factor varied. The measured unloaded Q factor of integrated finline was found to be two to three times better than that of microstrip. Owing to the low loss of integrated finline, its freedom from tight tolerances and compatibility with hybrid devices, this new transmission line is well suited to millimetre integrated circuits.
Patent•
10 Aug 1973
TL;DR: In this paper, the detector diode is beam-leaded and integrally mounted on a stripline that is inserted in the waveguide, which is the transmission medium for the output signal.
Abstract: In the disclosed millimeter-wave downconverter or detector, the detector diode is beam-leaded and integrally mounted on a stripline that is inserted in the waveguide. The diode is connected to the stripline by conductors forming a part of the stripline and is biased through d.c. bypass conductors without substantially affecting the stripline. The stripline is the transmission medium for the output signal. Tuning is accomplished by one or more movable dielectric plates inserted adjacent the stripline impedance for small inward travel and a primary effect on the waveguide impedance for larger inward travel. Precise impedance matching is facilitated.
TL;DR: In this article, the LSE-mode model was used for the even and odd modes of parallel-coupled microstrip lines, and the dispersion relationship was shown to be the same as for single lines.
Abstract: Dispersion predictions for the even and odd modes of parallel-coupled microstrip obtained by using the LSE-mode model for microstrip are found to be in good agreement with recently published measurements. Both the basic dispersion relationship and the empirical factor G appear to be the same as for single microstrip lines if the even- and odd-mode impedances used are those of the total parallel-coupled configuration rather than those of a single line of the coupled pair.
TL;DR: In this paper, an approach to the solution of the equivalent electrical length and the additional capacitance associated with a right-angled bend in microstrip line is outlined, under static assumptions, corresponding to a quasi-TEM mode of propagation.
Abstract: An approach to the solution of the equivalent electrical length, and the additional capacitance, associated with a right-angled bend in microstrip line are outlined. The calculations were performed under static assumptions, corresponding to a quasi-TEM mode of propagation of the fields. Although little theoretical work existed for comparison at the time of writing, encouraging reinforcement was gained with experimental results cited from the literature.
01 Oct 1973
TL;DR: In this paper, a calibration procedure for use in the automatic computer correction of s parameter measurements on stripline components, such as transistors mounted in microstrip, where dimensional restrictions of the jig severely curtail the choice of standard terminations.
Abstract: The letter describes a calibration procedure for use in the automatic computer correction of s parameter measurements on stripline components, such as transistors mounted in microstrip, where dimensional restrictions of the jig severely curtail the choice of standard terminations.
Patent•
14 Sep 1973TL;DR: In this article, a flat package is provided for holding microwave integrated circuits and a planar base, spacer and frame are provided in a rectangular package provided with a cutout portion adapted for containing RF electrical circuit components mounted on a standard dielectric circuit board.
Abstract: A flat package is provided for holding microwave integrated circuits A completely inorganic assembly of ceramic and metal materials is fabricated from thin sheet materials and hermetically sealed Using the ''''green tape'''' process, a planar base, spacer and frame are provided in a rectangular package provided with a cutout portion adapted for containing RF electrical circuit components mounted on a standard dielectric circuit board The dielectric package contains metallized edge portions on an RF terminal for electrically connecting the package to a standard microstrip having a ground plane DC and bias leads are provided on a separate edge portion of the flat pack
TL;DR: Matrix methods are used to analyze the properties of covered microstrip and the Green's function is calculated by a potential theory method assuming the TEM mode of propagation.
Abstract: Matrix methods are used to analyze the properties of covered microstrip. The Green's function is calculated by a potential theory method assuming the TEM mode of propagation. Computed impedance values of covered microstrip agree closely with other experimental and theoretical data. The technique is a general one and can be used to treat multiple-layer and covered microstrip.
TL;DR: In this paper, a complete set of original current-distribution functions is proposed for higher-order discrete modes in open microstrip lines. And the calculated values of phase velocity are in very good agreement with known experimental results.
Abstract: For the first time, an investigation is made into the higher-order discrete modes in open microstrip lines. A complete set of original current-distribution functions is proposed. For the lowest-order mode, the calculated values of phase velocity are in very good agreement with known experimental results.
TL;DR: In this paper, an extension to the analysis given by Lewirt is presented, which shows that the radiation loss is a maximum for the dominant mode and a minimum for the second mode.
Abstract: The Q factor of an open-circuited resonator is influenced by dielectric, conductor, and radiation losses. This short paper discusses these losses and shows that insight into the radiation loss can be obtained by an extension to the analysis given by Lewirt. This shows that the radiation loss is a maximum for the dominant mode and that provided the permittivity is not less than 9.0 the radiation losses are at a minimum for the second mode. It is suggested that these results may be applied to the design of filters based on dielectric resonators. The application of the results to stripline resonators in which the dielectric extends past the termination of the upper conducting strip is more difficult, and it is suggested that experimental work is required to investigate postulated improvements. Finally, some of the radiation patterns of the open-circuited dielectric resonators, obtained in this paper, show interesting directional properties which may be applied to the design of antenna systems.
TL;DR: In this paper, a magnetically tunable resonator was constructed in microstrip on a ferrite substrate, with an external magnetic field applied in the direction of the RF propagation, 17 MHz/Oe for magnetic fields from 0 to 30 Oe.
Abstract: Magnetically tunable resonators have been constructed in microstrip on a ferrite substrate. A large tuning range is obtained with an external magnetic field applied in the direction of the RF propagation, 17 MHz/Oe for magnetic fields from 0 to 30 Oe. A variable frequency microstrip oscillator which uses this effect is described; measurements made on an X-band IMPATT oscillator illustrate a tuning range from 9.4 to 10.5 GHz with an output power of 330 mW /spl plusmn/ 0.5 dB.
TL;DR: In this paper, the equivalent electrical lengths of uniform microstrip line associated with an abrupt impedance step are evaluated, under static assumptions, and the importance of these results in establishing a reference plane for the step and in the application of calculations of capacitance associated with the step, is demonstrated.
Abstract: The equivalent electrical lengths of uniform microstrip line associated with an abrupt impedance step are first evaluated, under static assumptions. The importance of these results in establishing a reference plane for the step, and in the application of calculations of capacitance associated with the step, is then demonstrated. Furthermore, some interesting dualities are discerned from the results.
TL;DR: In this article, the authors present a method which gives an analytical expression for /spl omega/ for the case of suspended microstrip couplers, where odd and even impedances are the interesting parameters.
Abstract: Using the Frankel-Young method, fast estimation of the potential distribution for a microstrip structure is obtained when an accelerating factor /spl omega/ is introduced in the finite-differences (relaxation) method. It is possible to calculate such a factor by an iterative technique, but the time of computation needed to find /spl omega/ annihilates the theoretical gain. In this short paper, the authors present a method which gives an analytical expression for /spl omega/. The realistic case examined here, as an illustration, is that of the suspended microstrip couplers for which odd and even impedances are the interesting parameters. Given an analytical expression for /spl omega/, the overrelaxation method appears as a very powerful and attractive method for finding the solution of any type of microstrip structure.
01 Oct 1973