Abstract: A broadband, inductively coupled, duplex, radio frequency (RF) transmission system for communcating between a central unit (10) and a plurality of remote units (31) is disclosed. The central unit (10) includes an RF signal source (11) and an RF receiver (21) connected to one end of a balanced transmission line (25) via a signal splitter (15) and a transmission line impedance matching network (27). Each remote unit (31) includes a receiving section (33) and a transmitting section (35) separate from one another. Each receiving section (33) and each transmitting section (35) includes U-shaped couplers (37,43) positioned so as to overlie the balanced transmission line (25). The U-shaped couplers (37,43) are oriented such that the cross-members of the U-shaped couplers (37,43) lie orthogonal to the balanced transmission line (25) and the legs of the U-shaped couplers (37,43) lie parallel to the balanced transmission line (25).

Abstract: A transmission line transformer that can balance imperfectly balanced signals, and can convert a balanced input to an unbalanced output. The transformer includes two unbalanced transmission lines each having a characteristic impedance Z.sub.o. The outer conductor of each is interrupted at its midpoint and is connected to the corresponding interrupted outer conductor of the other. An input signal applied across the ends of the first line's center conductor yields a balanced outer signal across the ends of the second line's center conductor. An unbalanced output can be obtained by terminating one end of the second line with an impedance Z.sub.o.

Abstract: A reciprocal impedance conversion network is disclosed. Such conversion network preferably is used in a reciprocal negative impedance repeater for the nonloaded cable facilities of a telephone system. Two independent voltage sources for generating reciprocal negative impedance are connected between a first port and a second port. The first port is operably connected to the first voltage source such that a series negative impedance appears at that port. This port is specifically connected to the switching equipment of the telephone system. The second port is operably connected to the second voltage source such that a shunt negative impedance appears at that port. The second port is specifically connected to the nonloaded cable facilities of the telephone system. The invention further provides a frequency dependent gain circuit which is useful for equalizing the losses along the nonloaded cable facilities.

Abstract: Inductance coupling type transmission channel couplers mounted on either side of an insulator such as window glass of a vehicle including a pair of resonator, each including a cylindrical outer conductor and a helical conductor coaxially provided in the outer conductor with one end connected thereto. The resonant frequency of the tuning inductance circuit thus constructed is set at 1/3 of an objective frequency, and the ratio between the inner diameter and the outer diameter of the helical conductor is set at 1.1-2.0.

Abstract: A microwave antenna structure couples electromagnetic microwave energy from a microwave transmission line into a sample contained in a sample container without invasion of the sample. The microwave antenna structure is formed by a bifilar helix of conducting first and second helical elements. The first and second helical elements are arranged in a parallel relationship defining a double helix with alternating spaced apart helical turns from the respective first and second helical elements. The double helix forms a holder for receiving and holding a sample container within the turns of the double helix. The first and second helical elements are formed with coupling extension for coupling to opposite polarity conductors of a microwave transmission line. Electromagnetic microwave energy propagating along the transmission line is coupled into sample material within the sample container.

Abstract: An RF transformer employs at least three elongated conductive elements in generally parallel spaced relationship. At least a first inductive element is connected between a pair of the conductive elements to provide a desired field distribution. A diagnostic technique for determining the frequency shift of the transformer employs a perturbing object which is selectively longitudinally positioned within the transformer. The transformer has particular utility as an RF excited gas laser.

Abstract: A cathode drive circuit couples a video drive signal from a cathode output amplifier to the cathode of a cathode ray tube along a first matched transmission line. Any signal energy not absorbed by the cathode is coupled along a second matched transmission line to a power dissipating load. The use of matched transmission lines avoids reflections in the system and eliminates attendant signal degradation. The power dissipating load can be located at any distance remote from both the cathode output amplifier and the cathode so as to minimize heat dissipation problems.

Abstract: A semiconductor device useable as an electromagnetic isolator. The device has a semiconductor substrate epitaxial with a layer of metal, the latter deposited so as to generate a residual magnetic flux. A waveguiding structure is disposed transverse to the flux effective to cause electromagnetic signals propagating in the waveguiding structure to be attenuated a different amount depending on the direction of propagation. The waveguiding structure is preferably a seminconductor layer deposited epitaxially with the substrate in a channel in the metal.

Abstract: The frequency response of a component whose output decreases past a first frequency is extended by employing apparatus which provides for a signal source to be coupled to a component transmission line through a coupling impedance of about zero. The transmission line is resonant at a second frequency greater than the first frequency and the characteristic impedance of the transmission line is selected such that the voltage drop at or near direct current across the component is about equal to the voltage drop across the component at the second frequency. The method of operation comprises providing a signal, forming a transmission line which is resonant at the second frequency and coupling the transmission line to both the component and the signal source. The characteristic impedance of the transmission line is adjusted such that the voltage across the component at or near direct current is about equal to the voltage across the component at the second frequency.

Abstract: An inductive coupled power system has a transmission circuit with a dual primary comprising two conductor loops. First segments of the loops extend through an area served by the system adjacent each other and second segments of the loops extend through the area one on either side of the adjacent first segments. A small loop configuration minimizes the stray magnetic field. A secondary pickup assembly has a U-shaped core with two legs which embrace the first segments of the two loops and a core element adjacent the first loop segments is positioned between the ends of the legs. Each of the power circuits of a plurality of loads includes a shunt regulator.

Abstract: A monolithic transformer comprises two windings arranged in a plane with conductors of the windings interleaved with and crossing one another, whereby each winding is symmetrical with respect to a center point of the winding, to which a center tap connection can be made. The conductors of the windings and crossings therebetween can be arranged so that adjacent conductors belong to the different windings for maximum coupling. An unbalanced circuit can be connected between the center tap and one end of a winding, the other end electrically floating, to compensate for the effects of the unbalanced circuit on interwinding capacitance. The transformer can be constructed using air bridge technology with conductors supported by and spaced from a surface of a substrate.

Abstract: A signal processing apparatus and method extend the frequency response of a component whose output decreases past a first frequency. The apparatus responds to a signal having a range of frequencies which is applied to a component transmission line and the component transmission line is coupled to the component. The component transmission line is resonant at a second frequency greater than the first frequency and has a source impedance and an input impedance which are not matched. The source impedance is greater than the impedance of the component. The method comprises providing a signal, forming a transmission line which is resonant at the second frequency and coupling the transmission line to both the component and the signal source. The source impedance is adjusted such that the voltage across the component at a low frequency limit is about equal to the voltage across the component at the second frequency.

Abstract: An RF transformer employs at least three elongated conductive elements in generally parallel spaced relationship. At least a first inductive element is connected between a pair of the conductive elements to provide a desired field distribution. A diagnostic technique for determining the frequency shift of the transformer employs a perturbing object which is selectively longitudinally positioned within the transformer. The transformer has particular utility as an RF excited gas laser.

Abstract: At a transmission line (La', Lb') connected with telephone station equipment (Tel) via a lowpass filter (TP), via which telephone station signals are transmitted in a first frequency range, there is connected via a line transformer (U3) a data terminal (DG) which is able to receive and to send data signals in a second frequency range above the first frequency range. On its side toward the transmission line (La', Lb'), the lowpass filter (TP) has a capacitive termination (C7) which is rated so that its a-c resistance is in the order of magnitude of or preferably less than the characteristic impedance of the data transmission line in the second frequency range.

Abstract: A signal processing system is disclosed that divides a broad band of input signals into separate channels separated by stopbands and permits operation in the crossover frequencies occuring at these stopbands. A triplexer separator receives and divides the broad band of input signals into a first, second and third band of signals, and sends them respectively to a first, second and third signal channel. The first and third signal channels are narrow bands which respectively occur at the lower and upper frequency end of the broad band of input signals. The second signal channel is identical to the broad band of input signals. In normal operation the first, second and third signal channels separately and independently conduct their respective signals to a triplexer combiner, where they are recombined.

Abstract: A resonant cavity waveguide coupler for ICRH of a magnetically confined plasma. The coupler consists of a series of inter-leaved metallic vanes disposed withn an enclosure analogous to a very wide, simple rectangular waveguide that has been "folded" several times. At the mouth of the coupler, a polarizing plate is provided which has coupling apertures aligned with selected folds of the waveguide through which rf waves are launched with magnetic fields of the waves aligned in parallel with the magnetic fields confining the plasma being heated to provide coupling to the fast magnetosonic wave within the plasma in the frequency usage of from about 50-200 mHz. A shorting plate terminates the back of the cavity at a distance approximately equal to one-half the guide wavelength from the mouth of the coupler to ensure that the electric field of the waves launched through the polarizing plate apertures are small while the magnetic field is near a maximum.

Abstract: Input and output equipment are provided for connecting first and second wideband signal transmission mediums through link equivalent to a balanced transmission line. The line can be made up of crosspoint cells includes in a wideband switching matrix, or can be a line distributed to intermediate equipments in a videocommuncation network. The input equipment includes means for separating high and low frequency signals included in the received wideband signals, means for transmitting the high frequency signals in differential mode, and means for transmitting the low frequency signals in High-Input Low-Output (HILO) mode. The output equipment includes means for taking the high and low frequency signals separately and means for summing the high and low frequency signals into wideband signals to be transmitted in the second medium.

Abstract: A transformer has a number of single turn primary windings 5 formed by printed circuit tracks on a flexible bendable sheet 3 which is wrapped around a core of the transformer. The primary windings are connected to output terminals 12 of an enclosure 1 of the transformer by another printed circuit board 8 having further conductive tracks on opposite sides thereof to form balanced transmission lines whose impedance is matched to the impedance of the primary windings.

Abstract: A signal dividing network is provided as an RF splitter for use in supplying N load devices of varying impedances with RF signals such that each of the N signals is of essentially the same magnitude and phase. The splitter includes a plurality of step-down auto transformers, each having a primary and a secondary defining a series circuit between a common RF source and ground. An output terminal is defined as the midpoint of the primary and secondary windings on each transformer and the output terminals are connected together in common whereby all of the primary windings are connected in parallel and all of the secondary windings are in parallel. Each output terminal has several outputs connected thereto such that the splitter has a total of N outputs for driving N load devices.

Abstract: Coaxial cable having an induction cable helically wound around a carrier cable.

Abstract: A power distribution device having a first input that can be operably connected to a power source, a second input that can be operably connected to an operator controlled switch, and an output for connection to peripheral devices to be powered. The device further includes a first comparator unit for sensing when the operator controlled switch has been closed and for providing an output signal in response thereto, and a second comparator unit that can respond to the output signal created by the first comparator unit to provide a control signal. A power switch unit responds to the control signal and can connect and disconnect the output of the device to the power source input. A delay unit serves to delay the response of the second comparator unit to a change in the output signal state of the first comparator unit.

Abstract: The present invention provides a track circuit for AC electrified railways, formed by the two rails (R.sub.1,R.sub.2) of a railway section and comprising a transmitter (E) connected to one end of the track circuit for generating therein an alternating signal of given frequency and a receiver (R) connected to the other end for controlling the operation of a track relay (RV). A number of capacitive impedances (Z.sub.1,Z.sub.2, . . . Z.sub.n) with parallel inductance and capacitor (each having a middle point (3) connected to the ground) are connected between the rails (R.sub.1,R.sub.2) while being spaced apart over the whole length of the track circuit with a given pitch (P), depending on the values of the impedances, so that the transmission attenuation of the circuit at the operating frequency is always less than the transmission attenuation of a circuit having the same length formed by a rail with ground return.

Abstract: A transmission channel coupler for an antenna including two resonators, each resonator being formed with a helical conductor and an outer conductor which is disposed outside of the helical conductor by sharing the same axis with the helical conductor. One end of the helical conductor is electrically connected to the inner wall of the outer conductor, and the other end of the helical conductor is connected to a printed circuit board mounted at the end of the outer conductor so that the helical conductor is positioned inside the outer conductor. The resonators are coaxially mounted on the either side of a glass such as the rear window of a car, window of a building, etc. By means of the structure above, high frequency signals are transmitted through an insulating material, that is, the glass, without damaging it. Also, the coupler can be manufactured small in size and provides excellent frequency characteristics with less transmission loss.

Abstract: A transmission channel coupler for an antenna including a first resonator and a second resonator. Each resonator has a helical conductor and an outer conductor which is disposed outside of the helical conductor by sharing the same axis with the helical conductor. One end of the helical conductor is electrically connected to the inner wall of the outer conductor, and the other end of the helical conductor is positioned within the area defined by an end face of the outer conductor. The first and second resonators are coaxially mounted on the either side of a glass such as rear window of a car, window of a building, etc. By means of the structure above, high frequency signals are transmitted through an insulating material, that is, the glass, without damaging it. Also, the coupler can be manufactured small in size and provides excellent frequency characteristics with less transmission loss.

Abstract: An Rf coil arrangement for MRI systems wherein the electrical length is reduced to improve the S/N ratio and the Rf power efficiency.

Abstract: A cyclotron resonance maser system includes coaxial coupling between coaxial wave guides. Such coupling is provided between an outer coaxial waveguide through which a gyrotron electron beam passes in generating or amplifying microwaves and an inner coaxial waveguide terminating in an annular window. The coupling separates the microwaves from the electron beam before the collector region of the gyrotron so that the collector dimensions are not related to, and hence restricted by, the wavelength of the output microwaves. The particular preferred coupling includes substantially axial slots in the common wall between the respective waveguides which slots provide selective coupling between the waveguides in the desired modes and limiting mode conversion. The coupling is preferably between a TE.sub.On or TE.sub.ml mode in the outer input waveguide and a TE.sub.On' mode in the inner, output waveguide, n and n' being integers greater than 1. A preferred resonant cavity limits the generated microwaves to a TE.sub.

Abstract: An interstage coupling network is provided comprising a series connection of an even number of reactive elements coupled between the input and output terminals of the interstage network, a junction point of said series connection of inductors being coupled to a signal reference potential via a first reactive shunt element. A series connection of oppositely-poled switching diodes is coupled in parallel with a portion of said series connection of reactive elements, the junction between the series-coupled diodes being coupled to the signal reference potential via a second reactive shunt element. A third reactive element is coupled between the network output terminal and a point on the series connection of reactive elements which is remote from the input terminal of the network.

Abstract: A two-part separable inductive coupler is provided in one part with a current-limiting reactor whose control winding is energized by control means in response to the formation of a magnetic circuit between primary and secondary windings incorporated in said one part and the other said part respectively. Said control means may comprise a rectifier connected across said primary winding and is arranged to saturate the reactor when the coupler parts are connected and leave the reactor unsaturated when the parts are separated, so as to limit the primary current.

Abstract: A dataset apparatus is powered by voltages extracted from electrical signals passing between the data terminal apparatus and the dataset by circuits comprising a capacitor and diode combination. The transmitter of the dataset includes capacitance isolation of the signal from the transmission lines by applying an oscillated voltage and an inverted oscillated voltage dependent upon the signal to capacitors in a first circuit to charge the capacitors through a diode whereby the oscillating voltage causes the capacitors to discharge through a second path formed by further diodes to charge a pair of capacitors coupled across the transmission lines. A second circuit of similar impedance to the first charges the capacitors to the opposite polarity. The arrangement can handle high common mode voltages on the transmission lines.

Abstract: A cyclotron resonance maser microwave amplifier includes coaxial input and output waveguides. Coupling apparatus for cyclotron resonance maser microwave amplifiers and other microwave power systems is provided for transferring microwave power between first and second waveguides. Geometry permits unwanted modes to be effectively attenuated. The coupling apparatus includes first and second coaxial hollow metallic circularly cylindrical members. The first member forms a first waveguide section. A second waveguide section coaxial therewith is bounded internally by the first member, and externally by the second member. The first member has a plurality of apertures for transferring microwave power between the first and second waveguide sections. The apertures are small relative to the radius of the first member and are spaced around the circumference of the first member in a generally symmetrical array.

Abstract: An impedance bond for use in an electrified railway to provide a path for traction current includes a housing and a core positioned within the housing. The core is formed of a band of silicon steel wound into a closed loop construction which is then severed to form a cap and a U-shaped body. A pair of coils are positioned each upon a leg of the U-shaped core prior to repositioning the cap upon the core. Each of the coils is substantially identical in electrical resistance and each is formed of a flat copper sheet, identical in length, and wound into coils identical in configuration. There are terminal straps attached to the coil which extend outwardly from the housing. The terminal straps are preferably cast copper.

Abstract: A high speed antenna coupler and method for rapidly switching binary weighted values of inductance and capacitance into and out of the circuit between an antenna and a utilization circuit without unacceptably degrading the coupler or slowing the switching action. PIN diodes are utilized as switches and the control wires for the PIN diodes are disposed interiorly of the copper tubing which forms the inductance elements. The control wire for a particular inductor is withdrawn from the interior of that inductor adjacent the mid-point thereof so that the control wire will be at the same RF potential as the inductor being controlled. Two diodes are utilized for each inductor, one connected to each end thereof, so that only half of the normal reverse bias is required for switching purposes. Where a transformer is utilized to couple the antenna to the utilization circuit, the control wires may be disposed interiorly of the copper tubing which forms the winding of the transformer.

Abstract: The variation in the external bandwidth of input and output resonators of YIG filters and of single resonator device, is corrected by means of frequency selective impedance transformers. The transformers are comprised of specific impedance transmission lines which may be incorporated as integral parts of the YIG filter RF circuit.

Abstract: A feed forward circuit that can be used as an isolator or filter includes a first and a second directional coupler that, depending on the application, either splits an applied signal into two paths or combines the two paths to obtain an output signal. One path includes an electronically tunable band reject filter (or notch filter) which may be bypassed by a switch in the isolator application, and an inverting amplifier. The second path includes a delay line that compensates for the time delay of the signal in the first path due to the time delay of the inverting amplifier and electronically tunable band reject filter.

Abstract: An adapter for coupling microwave energy or both microwave and spark energy into the combustion chamber of a gasoline engine through the chamber spark plug comprising a sleeve adapted at one end to be tightly received over the spark plug insulator housing, and a connector carried at the opposing sleeve end and adapted for connection to a spark plug lead for transmitting spark energy to the spark plug electrodes. A microwave antenna is carried externally of the sleeve for transmitting microwave energy in a waveguide mode through the sleeve and through the insulator housing into the engine chamber while substantially bypassing the spark energy conduction path. The antenna, which may comprise a square loop antenna disposed in a plane parallel to the sleeve and spark plug axes, is adapted to be coupled to a source of microwave energy for monitoring of engine ignition events, etc.

Abstract: An electronic transformer is characterized by a pair of out of phase and bilateral current sources, the outputs from which are opposite in phase and control voltages across and currents through respective source and load impedances by combining the voltages in opposition through an amplifier that controls each current source. The electronic transformer has some properties which are essentially the same as those of a conventional magnetic transformer, except that there advantageously is no magnetic field and unwanted magnetic coupling with adjacent components, and the equivalents of leakage reactance, mutual reactance, turns ratio and/or impedance matching may be conveniently and accurately electronically controlled. In addition, the electronic transformer can readily be operated as a switched gain amplifier source, a negative impedance amplifier and/or a positive impedance network generator.

Abstract: The invention relates to bulk or surface magnetostatic wave devices. The invention provides in the ferrimagnetic substrate of such a device, at least one area with absorption increased by a treatment consisting in local sanding of the substrate or its support to produce several defects by the impact of abrasive particles. The invention is applicable to magnetostatic wave lines and filters.

Abstract: Transient data recorder systems including a high speed charge coupled device and a device exerciser, including a high speed sampler and driver circuitry.

Abstract: The output electrode of a field effect transistor of a high-frequency input stage is connected to a capacitively coupled input (gate) electrode of the field effect transistor of a mixer stage through one of a pair of bifilarly wound coils provided on a ferrite core, while the second of these coils connects the same input of the mixer stage to the output of a local oscillator in such a way that two signal paths leading towards the mixer stage, respectively for the high-frequency signal and the oscillator signal, go through coupled coils in opposite winding directions. The result is that the path for signals in either direction between the local oscillator and the input stage are of much higher impedance than the paths for signals proceeding to the mixer stage respectively from the input stage and from the local oscillator.

Abstract: Transformer configurations especially useful in the microwave frequency range. A reliable physical center-tap is achieved by the interposition of a stub at the center of an elongated member which provides electrical contact with a reactive impedance. The circuit formed thereby allows the reflection of an r.f. short circuit to the center of the elongated portion without attendant fabrication thereon. A loop configuration for the remaining coupling means allows adjustability of electromagnetic coupling which is less sensitive to spacing of primary and secondary than the common parallel configuration.

Abstract: High frequency transformer built from coaxial conductor sections, wherein a pair of coaxial conductor sections of equal length have external conductors which are insulated from each other. The input end of the external conductor of the first coaxial conductor section is connected with the input end of the internal conductor of the second coaxial conductor section and both of the unconnected input end internal and external conductors form input connections. The output end of the internal conductor of the first coaxial conductor section is connected with the output end of the external conductor of the second coaxial conductor section and both of the unconnected output end internal and external conductors form output connections.

Abstract: A high frequency transformer for a wide range of frequencies and of the kind comprising a winding means attached on a core means, the winding means consisting of two parallel conductors isolated from each other, of which conductors one constitutes a primary winding, and the winding formed of the two conductors connected in series constitutes a secondary winding in a transformer coupled by economy coupling with a transforming ratio of 1:2. The conductors are wound on two parallel cores of soft magnetic materials spaced apart and connected by yokes at both ends. The winding pattern between cores lies in figure 8 patterns with opposite coils of the 8 patterns on each of the two cores.

Abstract: A dielectrically loaded four-port waveguide circulator is used with a reflected-wave maser connected to a second port between first and third ports to form one of a plurality of cascaded maser waveguide structures. The fourth port is connected to a waveguide loaded with microwave energy absorbing material. The third (output signal) port of one maser waveguide structure is connected by a waveguide loaded with dielectric material to the first (input) port of an adjacent maser waveguide structure, and the second port is connected to a reflected-wave maser by a matching transformer which passes the signal to be amplified into and out of the reflected-wavemaser and blocks pumping energy in the reflected-wave maser from entering the circulator. A number of cascaded maser waveguide structures may thus be housed in a relatively small volume of conductive material placed within a cryogenically cooled magnet assembly.

Abstract: Recursive digital filter deriving the samples of a filtered output signal at a present sampling instant from the samples of an input signal to be filtered at said present sampling instant and at two preceding consecutive sampling instants and from samples of said filtered output signal at said two preceding consecutive sampling instants.

Abstract: A transceiver (transmitter-receiver) for high frequency data pulse signals is connected to a coaxial cable transmission line through a distributed delay line which has an impedance equal in value to the characteristic impedance of the coaxial cable transmission line. The transceiver transmitting and receiving circuits are tapped into the transmission line and form a part of the distributed delay line. When not in the transmitting mode, the transmitter circuit appears as a reactive element of the distributed delay line and thereby introduces minimum loss or reflection into the transmission line. The transmission line can serve as a trunk line for a number of transceivers by permitting virtually unrestricted multipoint connections to the line.

Abstract: A circuit for the parallel coupling of audio frequency transmitting stations in a wave band filter construction is described, in which the wave band filter consists of two resonant circuits tuned to an audio frequency essentially free of the line harmonics, coupled magnetically to each other, and electrically separated, and in which the line-side circuit has been designed as a series resonant circuit, and the capacitor of the generator-side resonant circuit has been connected in parallel to the audio generator and to the coupling inductance of an ironless coupling transformer.

Abstract: An active transformer is disclosed of the type which includes two primary terminals to which is applied a voltage v.sub.1 with a current i.sub.1, and two secondary terminals supplying a voltage v.sub.2 with a current i.sub.2. The transformer is characterized in that it includes a first circuit whose input, connected to the primary terminals, generates an input current of the form i.sub.1 ' = jC.sub.1 .omega.v.sub.1 and whose output supplies a current of the form i.sub.2 " = -jN.omega.v.sub.1 to the secondary. The transformer also includes a second circuit whose input, connected to the secondary terminals, generates an input current of the form i.sub.2 ' = jC.sub.2 .omega.v.sub.2, and whose output supplies a current i.sub.1 " = -jN.omega.v.sub.2 to the primary. The terms C.sub.1, C.sub.2 and N are respectively the dual equivalents of the terms L.sub.1, L.sub.2 and M found in the relations associated with a conventional transformer. The currents flow in such a way that they satisfy the relations i.sub.1 = i.

Abstract: A non-contacting electrical coupler for connecting a linearly movable radio frequency load to a stationary radio frequency power source both having a mean operating wavelength of .lambda.. The coupler comprises a pair of stationary parallel first generally tubular conductor members, each of which have an axially extending opening through the wall thereof. Terminal means are provided near a first end of the first conductor members connecting each of them to opposite sides of the power source. The first conductor members are connected together at a point located a distance substantially equal to odd multiples of .lambda./4 from the first end. A pair of movable second conductor members are disposed substantially coaxially one within each of the first conductor members. Each of the second conductor members have a length substantially equal to .lambda./4 and are axially movable within the first conductor members.

Abstract: An output coupler for a radio frequency oscillator includes a coaxial transmission line connector having a center conductor terminating in a coulping loop in the oscillator, the terminated end of the loop being secured to the cavity wall of the oscillator. Both the magnitude and depth of penetration of the loop are concurrently adjustable without altering the orientation of the loop by sliding the transmission line and center conductor with respect to the cavity wall. When optimum coupling is achieved, the transmission line connector is clamped in place.

Abstract: A current probe for coaxial conductors including a coaxial coupling having transformer surrounding the central conductor and a coaxial passive load assembly within the coupling connected between the central and outer conductors. The transformer and passive-load components are interchangeable with others of different characteristics.