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Showing papers on "Stub (electronics) published in 1971"


Journal ArticleDOI
TL;DR: In this article, the radiation conductance of an open-circuit microstrip stub is determined and the losses due to radiation from a stub are shown to be a significant fraction of the total loss.
Abstract: The radiation conductance of an open-circuit microstrip stub is determined. The losses due to radiation from a stub are shown to be a significant fraction of the total loss.

38 citations


Patent
J Oliver1, A Wedel1
25 Mar 1971
TL;DR: In this article, a lateral pipeline being laid is connected to a main pipeline lying on the bottom of the ocean by a tie-in assembly connected to the lateral line above the surface of the water.
Abstract: A lateral pipeline being laid is connected to a main pipeline lying on the bottom of the ocean by a tie-in assembly that is connected to the lateral line above the surface of the water The main line is equipped with a stub section of pipeline to which the lateral is to be connected The angle between the lateral and the main line is measured and from this the tie-in assembly is designed This assembly also includes two ball and socket type joints that permit limited misalignment between the sections of the tie-in assembly and the stub section of the pipeline connected to the main line and also allows relative rotation between at least two portions of the tie-in assembly A connector assembly is used to connect the tie-in assembly to the stub pipeline section An actuator is releasably connected to the tie-in assembly above the surface of the water and lowered with the tie-in assembly into the water to actuate the connector assembly to connect the tie-in assembly and the stub pipeline section This actuator can then be recovered and used again

16 citations


Patent
10 Mar 1971
TL;DR: In this article, a strip line Y-junction ferrite circulator is tuned by locating a stub at the junction between a pair of arms, each stub acts to adjust the impedance presented at the input arm.
Abstract: A strip line Y-junction ferrite circulator is tuned by locating a stub at the junction between a pair of arms. Each stub acts to adjust the impedance presented at the input arm.

14 citations


Journal ArticleDOI
01 Dec 1971
TL;DR: The technique of exact computer modelling has also been applied to oscillator circuits, using varactortuned Gunn devices, which can increase the microwave output power by a factor of 4 or 5.
Abstract: Measurement techniques have been developed which allow the complex admittance existing at a nominal microstrip open circuit to be accurately characterised. This information, together with the line loss and wavelength, has enabled the electrical defining plane of a shunt stub to be determined. By using a circuit-design technique based on computer modelling it is possible to allow for all these factors. When this approach was applied to the design of a filter with 13 elements, the computer element lengths, when fabricated in microstrip, produced a filter with a bandpass characteristic to within 1% of the computer-modelled response. The need for cut-and-try development is therefore virtually eliminated.The technique of exact computer modelling has also been applied to oscillator circuits, using varactortuned Gunn devices. These circuits are extremely complicated, since they employ waveshaping of the voltage applied to the device. The second harmonic is trapped in a carefully controlled independent resonant circuit. For certain devices, this technique can increase the microwave output power by a factor of 4 or 5. Without the use of cut-and-try methods, devices have operated only 5MHz away from the designed output frequency of 6GHz.

13 citations


Patent
30 Dec 1971
TL;DR: A pair of spaced apart axially slidable stub shafts upon which a rotor is supportingly mounted, and a removable segment of the spiral shaped surface of a centrifugal blower housing are provided for servicing and facilitating installation and removal of the rotor from the blower structure as discussed by the authors.
Abstract: A pair of spaced apart axially slidable stub shafts upon which a rotor is supportingly mounted, and a removable segment of the spiral shaped surface of a centrifugal blower housing are provided for servicing and facilitating installation and removal of the rotor from the blower structure.

12 citations


Patent
17 Mar 1971
TL;DR: In this article, a new pad having a rigid stub and stacked detachable sheets is made by interposing between and two adjacent sheets at least one film of heat activable glue, heating the stub portion to the activating temperature of said glue, applying pressure on said stub portion maintained at said temperature, then cooling the assembly at room temperature.
Abstract: A new pad having a rigid stub and stacked detachable sheets is made by interposing between and two adjacent sheets at least one film of heat- activable glue, heating said stub portion to the activating temperature of said glue, applying pressure on said stub portion maintained at said temperature, then cooling the assembly at room temperature. When the sheets are to be printed, the film of glue can preferably be replaced by a printing coating on a face of the stub of the said sheets, with a thermogluing ink. This new pad can advantageously be used as a calendar.

9 citations


Journal ArticleDOI
TL;DR: In this paper, a superconducting resonant circuit was used to detect nuclear radiation using a doped semiconductor crystal placed on the stub of a reentrant cavity, which exhibits a peculiar trap property at 70°K.
Abstract: Nuclear radiation is detected using a superconducting resonant circuit operated at 380 MHz. The technique uses a doped semiconductor crystal placed on the stub of a reentrant cavity. The cavity is lead plated and cooled to 4.2°K, such that it becomes superconducting. The cavity then becomes the frequency controlling element for a voltage variable oscillator. Nuclear radiation impinging on the crystal causes a change in the relative dielectric constant, which in turn causes the resonant frequency of the cavity to change. The crystal exhibits a peculiar trap property at 70°K or below, which allows any electron‐hole pairs generated in the crystal to be indefinitely trapped. The output frequency of the resonant circuit is then proportional to the total dose received by the crystal. Frequency shifts of the order of 4.051 kHz/min are observed in CdS, for a 14C source of 1 μ Ci.

6 citations


Proceedings ArticleDOI
16 May 1971
TL;DR: In this article, six.7watt IMPA TT diodes, directly coupled in tandem to a microstrip isolator have demonstrated electronic amplification and power accumulation at 9 watts input.
Abstract: Six .7-watt IMPA TT diodes, directly coupled in tandem to a microstrip isolator have demonstrated electronic amplification and power accumulation at 9 watts input. Stub coupling of the diodes is also effective for higher gain per stage.

5 citations


Journal ArticleDOI
TL;DR: In this paper, the basic relationship between the stress-strain curve obtained from a stub column test and the basic column strength curve is established, which simplifies the process of predicting column strength and eliminates full scale column tests and the measurement of residual stresses.
Abstract: The basic relationship is established between the stress-strain curve obtained from a stub column test and the basic column strength curve. Charts are prepared to allow the prediction of the buckling load of steel columns from stub column results. This approach simplifies the process of predicting column strength and eliminates full-scale column tests and the measurement of residual stresses.

5 citations



Patent
03 Feb 1971
TL;DR: In this paper, a powered roller for driving an endless conveyer comprises a shell 10 having end plates 12 in which are journalled stationary stub-shafts 16, 16 1 carrying at their inner ends a cradle 24 located within the shell and supporting an electric motor 26 which drives a pinion 28 meshing with a gear ring 29 mounted on the inside of the shell.
Abstract: 1,221,670. Motor driving arrangements. G. FAULKNER. 28 Aug., 1969 [11 June, 1968], No. 27718/68. Heading H2A. A powered roller for driving an endless conveyer comprises a shell 10 having end plates 12 in which are journalled stationary stub-shafts 16, 16 1 carrying at their inner ends a cradle 24 located within the shell and supporting an electric motor 26 which drives a pinion 28 meshing with a gear ring 29 mounted on the inside of the shell. Stub shaft 16 1 has a bore 32 through which the supply conductors 33 for the motor are led stub shaft 16 may also have a bore for supplying lubricant to the gearing. Openings 34 are provided in the end plates for the passage of cooling air.

Patent
29 Jan 1971
TL;DR: In this paper, an input waveguide and two output waveguides are arranged in an H-plane tee, and a power switch determines into which one of the output ports the power will flow.
Abstract: An input waveguide and two output waveguides are arranged in an H-plane tee. A power switch determines into which one of the output ports the power will flow. Each of the guides is a rectangular waveguide excited in the TE10 mode. The switch includes first and second end plates, each including a shorting tongue adapted to extend through a transverse slot in the broadwall of one of the output waveguides to form a shorting plate. The end plates are mechanically interconnected so that when one plate is in a closed position, the other plate is withdrawn to an open position which permits the passage of power. A capacitor screw or stub is located in one of the output waveguides to compensate for impedance mismatch. Limit switches are arranged to prevent the transmission of power to the input waveguide unless the end plates are in an operative position.

18 Feb 1971
TL;DR: In this paper, a single algebraic equation relating the diplexer performance and the various parameter first-order deviations is obtained, which gives guide lines for adjusting final performance and for predicting the combined effects of dimensional, thermal and frequency deviations upon the general performances.
Abstract: : Formulas for calculating the appropriate waveguide width for perfect performance at two center frequencies were derived for the differential length diplexer and long-stub filter. The general characteristics of these devices are calculated in terms of phase angle with dissipation loss included. An analysis of bandwidth, dimensional and thermal expansion tolerances for these devices is also given. A single algebraic equation relating the diplexer performance and the various parameter first-order deviations is obtained. This relation gives guide lines for adjusting final performance and for predicting the combined effects of dimensional, thermal and frequency deviations upon the general performances. Examples of diplexer and long-stub filter designs and analyses are given.

Patent
13 Dec 1971
TL;DR: A slot fed stub antenna comprising a ground plane and a cable geometrically centered and normally aligned with the ground plane, having one end in abutment with said ground plane is a cable comprising an elongated hollow member, dielectrically supported, having a circumferentially slotted cross section and a wire axially centered within said hollow member as discussed by the authors.
Abstract: A slot fed stub antenna comprising a ground plane and a cable geometrically centered and normally aligned with said ground plane, having one end in abutment with said ground plane, wherein said cable comprises an elongated hollow member, dielectrically supported, having a circumferentially slotted cross section and a wire axially centered within said hollow member.

Proceedings ArticleDOI
16 May 1971
TL;DR: In this article, a novel measurement technique was described, based upon the use of subminiature coaxial line, to gain electrical access to a terminal pair located inside the waveguide for driving point impedance measurements.
Abstract: A novel measurement technique is described, based upon the use of subminiature coaxial line, to gain electrical access to a terminal pair located inside the waveguide for driving point impedance measurements.

Patent
19 Jan 1971
TL;DR: In this article, a system of supporting and electromagnetically connecting the sectoral elements of a cyclotron or D''s is described, which employs a vertical conducting element rigidly linked to a horizontal metal arm.
Abstract: The present invention relates to a system of supporting and electromagnetically connecting the sectoral elements of a cyclotron or D''s. It employs a vertical conducting element rigidly linked to a horizontal metal arm which supports one said sectoral elements; said conducting element passing through the parallel faces of the accelerating enclosure in conical insulators. Said conducting element forms the inner conductor of a transmission line and is equipped at one end with a capacitor means for connection to the high-frequency source, and at the other end with an adaptable short-circuiting stub. The applications are in the field of circular ion accelerators.

Patent
08 Jan 1971
TL;DR: In this article, a small hole with sides parallel to a form tie is drilled into the concrete, and a tool comprising a long rod with a tight fitting sleeve is slipped over the stub of the tie and is rocked within the confines of the hole until the stub tie breaks off, and the hole is patched without feather edges.
Abstract: A method wherein a small hole with sides parallel to a form tie is drilled into the concrete, a tool comprising a long rod with a tight-fitting sleeve is slipped over the stub of the tie and is rocked within the confines of the hole until the stub tie breaks off, and the hole is patched without feather edges.

Journal ArticleDOI
TL;DR: In this paper, the capacitive loading of the tuning stubs enables the medium to be interpreted as a periodic-loaded waveguide with propagating characteristics in the passband, and a preferred operating region is suggested.
Abstract: It is shown that the capacitive loading of the tuning stubs enables the medium to be interpreted as a periodic-loaded waveguide with propagating characteristics in the passband. Broadbanding requires close stub spacing; a preferred operating region is suggested.