Abstract: A HTS-based RF receiver includes a cryocooler and a cryogenic enclosure in thermal communication with the cryocooler. The cryogenic enclosure contains a HTS filter and a LNA therein. A first MEMS bypass switch is positioned between a RF input and the HTS filter, the first MEMS bypass switch operatively coupling the RF input to the HTS filter. A second MEMS bypass switch is positioned between the LNA and RF output, the second MEMS bypass switch operatively coupling the LNA to the RF output. A bypass pathway located within the cryogenic enclosure is connected between the first and second MEMS switches to bypass the HTS filter and LNA when an operating parameter of the RF receiver falls outside a pre-determined range.

Abstract: An access point that is operable under outdoor or industrial environmental conditions may be provided. The access point may include a casing in which an indoor environment access point may be received. The casing may be substantially water-proof and may have rugged characteristics. A conduit that is substantially water proofed may be provided to provide a passageway for conducting electricity to or from the interior of the case. A heat exchanger and circuitry may be provided that regulates the temperature in the case when the indoor access point is operating to maintain the temperature approximately within a range that is suitable for the indoor access point. A back plate, and an antenna may be attached to the case.

Abstract: A printer is provided and is adapted to print jobs from a network. The printer includes a Faraday shield for enclosing a plurality of electrical components and parts in the printer. The shield includes a component for enabling wireless communication with the network. The component includes an antenna.

Abstract: A communication device (100, 200) capable of transmitting information provides the means for regulating the temperature (116) of one or more heat-sensitive modules or components (160) of the communication device through the adaptive and dynamic control of the flow of transmissions by the communication device, thereby eliminating the need for stored thermal profiles of heat-sensitive modules of the communication device. In addition to the heat-sensitive module(s), the communication device has a multi-logic controller block (110) and a transmission flow control block (140). The multi-logic controller block (110) receives the temperature of the heat-sensitive module (116) and a first control clock (112) and utilizes multi-value logic to generate a flow control signal having hysteresis (126).

Abstract: A radiation-shielding mobile phone case device for reducing the effects of radiation emitting by the hand-held communication devices. The radiation-shielding mobile phone case device includes a case assembly including a case having a front wall, a back wall, side wall, an open-able top wall, and a bottom wall, and a compartment disposed therein and being adapted to receive and store a mobile communications device; and also includes sheets of mesh material being disposed in the walls of the case.

Abstract: A device for reducing radiation from an antenna of a portable telephone, includes a main body having an outer body with a central bore, and an antenna gripping member mounted in the bore and having an antenna receiving opening for receiving the antenna of the telephone; a radiation reducing lead shield mounted to an outer surface of the main body and extending only partially therearound for reducing electromagnetic radiation from the antenna to a person using the telephone; a cover body in surrounding relation to the main body and the radiation reducing shield, and including a cover opening in alignment with the antenna receiving opening; and indicia on the cover body for indicating an orientation of the main body on the antenna such that the radiation reducing shield is positioned on a side of the antenna which is opposite from the earpiece speaker.

Abstract: In telecommunication devices like power amplifiers for cellular systems the amplitude of a transmission signal has to be limited to avoid signal deterioration. The improve the effciency of such amplitude limiter the present invention proposes to fed the input sample sequence to an estimation filter (56, 57) to determine the actual signal overshoot over a predefined threshold value. By this a clipping control signal to adjust the amplitude of the transmission signal accordingly can be generated with higher accuracy.

Abstract: The invention relates to a method and an arrangement implementing the method for adjusting output power of a transmitter power supply, in which method the output power of the power supply is measured and the output power of the power supply is adjusted on the basis of the measured output power. In the method, the output power of the transmitter power supply is adjusted on the basis of the transmission power of the transmitter such that a power supply control unit receives from the transmitter a synchronization chopping that synchronizes the operation between the transmitter and the power supply control unit, and the power supply control unit receives from the transmitter the information on the transmission power of the transmitter.

Abstract: An RF system includes a cryostat having a chamber and a cold region in the chamber, a high-temperature superconducting filter disposed in the cold area, a low-noise amplifier disposed in the chamber, a bypass switch coupling the high-temperature superconducting filter to the low-noise amplifier, and a conventional filter coupled to the bypass switch.

Abstract: Briefly, in accordance with one embodiment of the invention, a transmitted power indictor that may indicate of a transmitted power level of a cellular-phone transceiver is provided.

Abstract: A printed circuit board (PCB) has a plurality of electromagnetic interference (EMI) reducing circuits, which reduce electromagnetic waves emitted from the PCB, and a plurality of switching devices, such as MOS transistors, relays and DIP switches, to enable and disable the EMI reducing circuits. The EMI reducing circuits connected between border portions of a voltage and a ground layers in the PCB include at least a capacitor. A combination of the EMI reducing circuits which gives a minimum amount of electromagnetic waves emitted from an apparatus including the PCB is selected as a suitable combination of EMI reducing circuits. An information processing apparatus having the printed circuit boards has means for selecting a combination of the EMI reducing circuits which allow the minimum EMI emitted for the apparatus.

Abstract: An electronic device molded cover is disclosed with a releasable EMI shield to facilitate removal to separate the EMI shield and the cover into respective individual parts for reuse as raw material in the production of similar product applications. The EMI shield is made of an electrically conductive fabric sheet having glue drops in a spaced relation on one face for attachment to the interior of the cover. In an alternate embodiment, a conductive polymer paint coating is applied to the interior of the cover.

Abstract: A nonlinear compensating circuit, a base-station apparatus and a transmission power clipping method for executing a clipping operation beneficial against nonlinear characteristics of a high output amplifier at the transmitting end even in the case of multicarrier amplification. A plurality of power converting circuits calculate power values of respective input signals. An adder adds up the calculated power values to obtain a synthetic power value P. A divider divides a predetermined threshold value T by the synthetic power value P. When the divided value T/P is equal to or more than 1, a determining circuit outputs a clip control signal for turning off the clipping operation to a plurality of clipping circuits. On the other hand, when the divided value T/P is less than 1, the determining circuit outputs a clip control signal for turning on the clipping operation, which includes a square root of the divided value T/P obtained by the divider, (T/P)1/2, to the clipping circuits.

Abstract: An adaptive digital predistortion apparatus and method for transmitting broadband digital signals from a wireless transmitter to a transmitting channel are provided. In the adaptive digital predistortion process, a non-linearity conversion opposite to the transmitting channel characteristic is performed by a digital predistorter for input baseband signals. The predistorted signals are amplified by a power amplifier via an up conversion channel. A part of the signals outputted from the power amplifier are fed back to an adaptive controller via a coupler. The feedback signals are processed by the adaptive controller to obtain out-of-band emission energy of the feedback signals. Using the out-of-band emission energy as a target function, the predistortion parameters are updated by employing a multi-parameter optimum seeking module.

Abstract: The present invention relates to a novel use of cryoelectronic equipment to implement an extremely sensitive and stable receiver front end for UHF, microwave, and millimeter wave applications. The invention is particularly applicable to base station receivers in mobile radio systems, where the range and capacity of the systems are typically limited by the base station receiver sensitivity.

Abstract: A radiocommunications device comprising an antenna (20) and a power amplifier (24) connected to a printed circuit (26), the device being characterized in that the mass (21) of the antenna (20) and the mass (22) of the power amplifier (24) are thermally connected.

Abstract: An air cooled transceiver enclosure which includes multiple cooling posts about the enclosure. The transmitter and receiver antennas are planar mounted above the cooling posts and the cooling posts are selected so as not to interfere with the radiation and form part of the ground plane. The cooling posts are, in general, of a height which is less than one-quarter the wave length of the frequencies to be used. In accordance with another feature of the present invention, the transceiver base unit with cooling posts and mounted antennas has an easily attachable cover which is removably engaged to the transceiver base unit and offset from the planar antennas which lie above the base unit. In accordance with another feature of the invention, the transceiver base unit with cooling posts and mounted antennas has an easily attachable cover which is removably engaged to the transceiver base unit and offset from the planer antennas which lie above the base unit.

Abstract: An output power detecting circuit of transmitter, comprises a signal detecting unit connected between the transmitter output end and the transmitter control unit to detect an output signal of transmitter, a reference voltage generating unit, a differential amplifier having non-inverted input end, inverted input end and output end to supply a detection voltage to the control unit from the output end and a voltage limiting element connected between the inverted input end and reference potential point, wherein the detection voltage output from the signal detecting unit is supplied to the non-inverted input end, the reference voltage output from the reference voltage generating unit and an additional reference voltage of the transmitting level indicating voltage output from the control unit are respectively supplied to the inverted input end, the additional reference voltage supplied to the inverted input end is limited with the voltage limiting element and the detection voltage increasing with increase of the de

Abstract: A grounded, shielded holder for a radio frequency communications card installed in a terminal used in a wireless network includes a built-in antenna for transmitting and receiving radio frequency signals to and from the card. The antenna is formed from the material of the holder itself.

Abstract: A feedback compensation detector for a direct conversion transmitter includes a baseband processor, a direct up-converter, an antenna, and an impairment detection and compensation feedback circuit. The baseband processor generates an in-phase (I) baseband signal and a quadrature-phase (Q) baseband signal. The direct up-converter is coupled to the baseband processor, and combines the I and Q baseband signals with an RF carrier signal to generate an RF output signal. The antenna is coupled to the direct up-converter, and transmits the RF output signal. The impairment detection and compensation feedback circuit is coupled to the RF output signal and the I and Q baseband signals. The impairment detection and compensation feedback circuit down-converts the RF output signal to generate an intermediate frequency (IF) signal, measures as least one signal impairment in the IF signal, and pre-distorts the I and Q baseband signals to compensate for the measured signal impairment.

Abstract: A transmitter system for wireless communication with implanted medical devices includes a transmitter circuit having a resonant network the resonant frequency of which is adjusted by a feedback circuit in order to minimize the current drain from the power source and maximizing the power source life. The transmitter system may be powered by a power supply block which uses commonly available RS-232 signals of a host computer as a raw power source, combined with a high value storage capacitor to provide power for the wireless medical data programmer. A feedback circuit monitors the charging current as well as voltage impressed across the storage capacitor in order to maintain the charging current at maximum level during the charging time and in order to stop the charging once the full charge of the storage capacitor has been reached.

Abstract: A direct conversion transceiver capable of reducing a DC offset, using a multi-chip module is provided. In the transceiver, a mixer and an element constituting a local oscillator are positioned above a shielding ground surface, and an interconnection connecting the mixer and the element constituting the local oscillator are positioned below the shielding ground surface. The transceiver is formed as a multi-chip module and thus its size is not bigger than a one-chip direct conversion receiver and advantageous in that its size and manufacturing costs are less than a general direct conversion receiver that additionally includes a DC offset cancellation circuit or an off-chip type oscillator for reducing a DC offset.

Abstract: A shielding device to protect cellular or cordless telephone users from EMF including the RF microwave radiation comprises a flat internal flexible conductive sheath which is positioned on the top of a flat non-conductive sheathing with a border of non-conductive sheathing extending outwardly thereabout. The sheath assembly is rolled inwardly on both sides and then folded in back on the top and bottom. The recessed are between the rolls of conductive cloth and nylon sheathing is applied thereto. The non-conductive sheathing is cut on both ends of the back region for better audio and the rolls of non-conductive sheathing are trimmed on both sides at an intermediate position. A perforated vinyl/leather front is positioned thereover, hook and loop or Velcro® mounting tabs sewn thereon and a surrounding cover positioned thereover. The cellular or cordless telephone is positioned thereon and the shielding device is wrapped thereabout and locked with an elastic strap, for storage only.

Abstract: A compact mobile telephone apparatus comprising a two part fold-over mobile phone wherein one part, the lower part, is a hand set containing a keyboard, microphone, and earphone, and the other upper part, is a cover for said handset pivotally connected thereto, characterized in that said cover contains a monopole antenna extendable through the cover, at the opposite end of the pivotal connection to the handset, to a distance of 8-16 cm. from the earphone when the cover is in the unfolded position, raising the locus of radiation laterally and vertically above the head, thereby significantly reducing radiation to the head and increasing antenna efficiency.

Abstract: A system for transmitting digital signals in the same band and on the same channel with FM signals is disclosed. The design of the system according to the present invention includes a coupler, which may be a +3 dB hybrid quadrature coupler, and circularly polarized antenna. The +3 dB hybrid quadrature coupler maintains isolation between the FM signals and the digital signals. The circularly polarized antenna receives the FM signals and the digital signals, and transmits the signals after they have each been separately received at the circularly polarized antenna.

Abstract: An electromagnetic wave attenuator for a mobile communication terminal is provided. The electromagnetic wave attenuator for a mobile communication terminal includes a corrugate structure conductor having a plurality of ridges plurality of ridges between which slots are formed, and a highly dielectric material having a relative dielectric constant of more than 50 filled in the slots.

Abstract: Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced.

Abstract: A portable phone includes a front portion, and a cover made of titanium material and detachably engaged onto the front portion of the portable phone for shielding the electromagnetic waves generated by the portable phone. The cover includes a latch or one or more sockets or one or more catches for engaging with the latch opening or the lock studs or the lock notches of the portable phone and for detachably securing the cover to the portable phone. The cover includes a number of orifices and a window for aligning the dial buttons and the displayer of the portable phone.

Abstract: An assembly for shielding EMF/RF radiation emitted from portable telephones including a case having a shielding material capable of attenuating EMF/RF radiation. The case substantially encloses a portable telephone and includes at least one aperture for passage of a connector base. The assembly further includes an antenna capable of radial and tilt motion with respect to the portable telephone. The antenna is mounted to the connector base which is removably attached to the portable telephone and in contact with the case. A handle portion is attached along an exterior portion of the case. A shielding antenna case for shielding EMF/RF radiation emitted from portable telephones is also disclosed. The antenna case includes a shielding material capable of attenuating EMF/RF radiation and substantially encloses an antenna portion of the portable telephone. Attachment tabs are used for affixing the case to the portable telephone by way of fasteners.

Abstract: A chilled transceiver for use in terrestrial and satellite communication systems. The chilled transceiver eliminates various problems associated with transceivers which incorporate superconducting devices. In particular, the chilled transceiver is based entirely upon conventional semiconductor technology, such as heterojunction bipolar transistor (HBT) technology formed from conventional GaAs, AlGaAs and InP materials which when chilled to temperatures down to, for example, 100° K can provide a 50% improvement in noise while trimming power losses by 20% or more at the same time. In one embodiment of the invention, the chilled transceiver is formed with a chilled receiver front end which includes a frequency diplexer, a filter, a low-noise amplifier (LNA) and a mixer, formed from conventional semiconductor technology which are housed in a refrigerator typically used for superconducting circuits.

Abstract: In a radio apparatus including a transmitter unit and an antenna unit, a detector is located in the vicinity of an antenna in the antenna unit rather than in the transmitter unit. The detector supplies a rectified signal from a transmission wave which is to be radiated from the antenna and the rectified signal is supplied to a control circuit in the transmission unit as a feedback component. A control signal is then determined by the control circuit based on the rectified signal and supplied to a variable attenuator to increase/decrease power of the transmission wave.

Abstract: An apparatus for controlling the power level of an output signal from the output of an electronic amplifier. The electronic amplifier has a control signal input for receiving an amplifier control signal and has a power input for receiving current from a power supply. The apparatus comprises an amplifier output power detector, coupled to the output of the amplifier, used for generating a power measurement signal representing the output power of the amplifier. The apparatus contains a current detector arranged to detect the current received by the amplifier from the power supply and to provide a current measurement signal dependent on the amount of current received from the power supply. The apparatus contains a digital signal processor which receives the current measurement signal and provides a reference signal dependant on the current measurement signal.

Abstract: In accordance with one aspect of the present invention, a power amplifier system is provided for amplifying an RF input signal. The system includes a signal modulator that receives and modifies an input signal and provides therefrom a modified input signal. The system further includes a plurality of M sub-power amplifiers connected together in parallel with each receiving and amplifying a portion of the modified input signal. A combiner combines the amplified portions to provide a combined output signal. A power detector receives the combined output signal and provides therefrom an average output power signal representative of the average output power thereof. A controller monitors the operation of the M sub-power amplifiers to determine if any have failed and adjusts the magnitude of the output power signal to compensate for any failure. The controller controls the modulator in accordance with a function of the magnitude of the output power signal.

Abstract: A radio frequency (RF) power generator system includes a power generator that generates a RF power signal that is output to a load. The RF generator generates a forward power feedback signal and a reverse power feedback signal. A controller receives the forward power feedback signal and the reverse power feedback signal. The controller generates a setpoint signal that is output to the power generator. A setpoint modifier receives the forward feedback signal, the reverse feedback signal and an external setpoint signal. The setpoint modifier calculates a forward power limit based on the forward and reverse power feedback signals. The setpoint modifier and outputs a modified setpoint signal to the controller based on one of the forward power limit and the external setpoint signal. The setpoint modifier and the controller can be integrated.

Abstract: An improvement in the design and deployment of collocated radio transceivers for high-speed wireless Internet access accomplished by increased isolation brought about by wrapping each transceiver in a shield of mild steel, enclosing collocated transceivers and associated equipment in non-reflective enclosures, use of low loss RF coaxial cables, and use of high isolation parabolic horn antennas.

Abstract: An electromagnetic (EM) wave shield device including an upper pad including a central hole and a bottom adhesive surface, a lower pad including a central hole, a top adhesive surface, and a bottom adhesive surface glued to the earpiece of a mobile phone, and a metal mesh for shielding EM waves having a diameter smaller than pads, while larger than that of central holes so as to be glued and secured between pads. With this, when an incoming call is received, there is no or little EM waves outside the glued shield device to thereby prevent the brain of a mobile phone user from being hurt by EM waves.

Abstract: To provide a distortion-compensating apparatus capable of stably determining update values when distortion-compensating data to be stored in an amplitude(gain)-compensation-data memory is updated corresponding to ambient temperatures in a distortion-compensating apparatus of an RF-power amplifying means. When updating adverse distortion data for an RF-power amplifying means 12 in a portable telephone or the like corresponding to ambient temperatures, envelope detection signals at input and output sides of the power amplifying means 12, the distortion-compensating apparatus digitizes the individual envelope signals, performs arithmetic operations to obtain the amount of a deviation from a linear gain by using arithmetic-operation means 20 and 21, and thereby updates adverse distortion data to be stored in amplitude-compensation-data memory 7, 7a, 7b.

Abstract: A frequency mixing system that provides an expanded dynamic range when compared to the dynamic range(s) of an individual mixer(s) that makes up the frequency mixing system. The frequency mixing system adjusts the amplitude of an input signal to be frequency mixed to produce a frequency converted signal with an acceptable and/or lower (when compared to the amplitude of intermodulation distortion produced by mixing the input signal without amplitude adjustment) amplitude of intermodulation distortion. If the input signal were frequency mixed without the amplitude adjustment, an unacceptable and/or higher level of intermodulation distortion would result (when compared to the corresponding intermodulation distortion if the amplitude-adjusted signal were mixed by an individual mixer). Adjusting the amplitude of the input signal creates an adjusted signal with signal distortion on the first path.

Abstract: A mobile radio system includes a base station and a plurality of mobile radio apparatuses, with each mobile radio apparatus including a control CPU for controlling the mobile radio apparatus and monitoring the state of the hardware of the mobile radio apparatus, a transmitter unit for transmitting data in the form of radio waves, and a CPU monitor unit. The control CPU regularly monitors and checks for any abnormalities in the hardware of the mobile radio apparatus, and the CPU monitor unit regularly monitors and checks for any abnormalities in the control CPU. If there is an abnormality, a disabled transmission out put acceptance signal is supplied to the transmitter unit to inhibit or suppress the output of radio waves thereby avoiding interference to the system caused by unnecessary radio wave transmission from an abnormal mobile radio apparatus.

Abstract: A radiation blocking device for use with a portable communication apparatus such as a cordless or cellular phone. The device has a radiation shield and a connector for attaching the shield to the apparatus. The shield is sized and shaped to reflect radiation emitted by the antenna which would otherwise strike the head of a user of the apparatus. The shield also reflects and absorbs heat emitted by the antenna, reducing the amount of such heat incident on said user's head. The shield is in the shape of an arc of circle and is preferably positioned concentrically with the antenna.

Abstract: An electromagnetic radiation protection device of a mobile phone installed at one side of an antenna of a mobile phone. The device comprises an electromagnetic wave absorbing piece, a dielectric plate, an electronic joint loop, a negative electrode lead, etc. The electromagnetic wave absorbing piece serves to absorb the electromagnetic wave toward the user's head. Then the electromagnetic wave irradiates to the negative electrode lead of a power source through the electronic joint loop and the negative electrode lead. Thereby, the electromagnetic radiation from the mobile phone to user's head will be reduced effectively, and the threat of brain harm is also reduced.

Abstract: The invention relates to an electronic apparatus whose power is supplied by a battery (11) having a memory (32) which contains electrically erasable data (32a) and a supply voltage detection device (37) for detecting a variation of the supply voltage (Vbat). The invention notably has for its object to provide a detection device (37) which is capable of instantaneously detecting various voltage levels to cut off the power supply (Vbat) without the contents of the memory (32) being changed and capable of indicating the charging level of a battery (11) or an overload. The invention may be used in portable telephones and other electronic equipment whose power is supplied by a power supply battery.

Abstract: A detector circuit (1) includes a coupler (2) having a primary port (10) and a reflector port (11). The primary port (10) has an input node for receiving radio frequency signals from an amplifier (7) and an output node coupled to an antenna port (ANT). There is a rectification circuit (3) having an input coupled to the reflector port (2) and a low pass filter (4) is coupled to an output of the rectification circuit (3). The detector circuit also includes a comparator (5) having a reference input (Vref) and a signal input (Vin). The reference input (Vref) is set to a voltage threshold level and the signal input is coupled to an output of the low pass filter (4). In use signals at an output of the comparator (5) are indicative of a missing or mismatched antenna coupled to the antenna port (ANT).

Abstract: A method includes steps of establishing a wireless connection with a user terminal through a forward link and a return link; determining, during the connection, if an averaged transmitted power density associated with an antenna of the user terminal will equal or exceed, relative to a user of the terminal, at least one of a predetermined threshold level, within a specified unit of time, and an absolute threshold level; and taking action to reduce or eliminate the transmitted power at a time prior to or when the averaged transmitted power density level equals or exceeds the threshold level. The step of determining includes a step of considering the operation of the user terminal in a satellite communications system as well as in a terrestrial communications system.

Abstract: An apparatus and method to use the temperature of a transmitting radio to prevent transmission of radio waves outside of an assigned frequency band. More specifically, if a transmitter exceeds a specified temperature the transmitter will be automatically disabled to prevent temperature caused frequency shifts outside the approved frequency transmission band for the transmitter. The transmitter has a temperature sensor that senses temperature and compare the operating temperature against a preselected temperature limit. It the operating temperature either is too hot or too cold the transmitter will be disabled and will not transmit until the temperature falls or rises to an acceptable level.

Abstract: The present invention relates to a novel use of cryoelectronic equipment to implement an extremely sensitive and stable receiver front end for UHF, microwave, and millimeter wave applications. The invention is particularly applicable to base station receivers in mobile radio systems, where the range and capacity of the systems are typically limited by the base station receiver sensitivity.

Abstract: A device for radio communication (PH), such as for example radiophone, includes a shielding layer (RFS) which under operating conditions is between the antenna and the user. The shielding layer (RFS) reduces electromagnetic irradiation of the user. The shielding layer (RFS) may be movable in such a manner that it serves as a cover of some operational devices such as for example, the headphone, display and keyboard of the apparatus when it is not used.

Abstract: The present invention addresses the need for an apparatus and method for controlling the load of a PA, to improve PA efficiency in linear transmitters with isolator elimination (IE) circuitry, that does not require the use of high frequency RF circuitry. The present invention provides a PA load controller (130, 131) that improves the efficiency of a PA (116) by adjusting the PA load using an AGC signal (134), a level set adjustment signal (132), and a signal strength indicator (135), these three signals are readily obtained from continuous gain and phase adjustment circuitry (e.g., 102). The load controller determines a phase of the PA load that minimizes the AGC signal and a phase of the PA load that maximizes the level set adjustment signal. From these determinations, the PA load controller determines a phase of the PA load that improves the efficiency of the PA and adjusts the PA load phase accordingly.

Abstract: The present invention relates to a novel use of cryoelectronic equipment to implement an extremely sensitive and stable receiver front end for UHF, microwave, and millimeter wave applications. The invention is particularly applicable to base station receivers in mobile radio systems, where the range and capacity of the systems are typically limited by the base station receiver sensitivity.

Abstract: A wideband multiple channel frequency converter includes a mixer, a frequency generator for generating a local oscillator signal, a power divider for receiving the local oscillator signal and providing a portion of the signal to the mixer and a portion of the signal to a feed forward path which phase and amplitude adjusts the signal and a power combiner for receiving and combining a signal from the mixer and the phase and amplitude adjusted signal from the feed forward path. In addition, an attenuator may be implemented to reduce a power level of a signal to be converted and a band-pass filter may receive the signal from the power combiner. The converter compensates for local oscillator signal leakage and can reduce inter-modulation components.