Moulder, US
Brian Moulder, Orange, CT US
Patent application number | Description | Published |
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20110169205 | Plastic Spring And Method And Apparatus For Making The Same - This invention provides a helical spring formed of plastic material, comprising a pair of end coils situated at respective ends of said helical spring; at least one full pitch active coil between said pair of end coils; a pair of transition coils, each transition coil interconnecting an end of a respective end coil to an end of a respective proximate full pitch active coil, and having a varying pitch. | 07-14-2011 |
Christopher Moulder, Portland, OR US
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20150374296 | NERVE CUFF STIMULATION ELECTRODE, CONTROL DEVICE FOR A VAGUS NERVE STIMULATION SYSTEM, AND VAGUS NERVE STIMULATION SYSTEM - A nerve cuff stimulation electrode for cervical VNS is provided and configured to be arranged so as to at least partially surround or enclose one of the vagus nerves. The cuff stimulation electrode has at least two contacts configured to deliver electric stimulation pulses to a vagus nerve. The cuff stimulation electrode further has or may be attached or connected to a tilt sensor, a kinematic sensor, and/or a pulsation sensor configured to generate a signal representative of arterial and venous pressures. The implantable tilt sensor is configured to output a posture signal indicating a patient's posture, thus allowing discrimination between supine and semi-recumbent or erect postures. | 12-31-2015 |
J. Christopher Moulder US
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20120179056 | APPARATUS AND METHOD FOR DETECTION OF LEAD FAILURE IN AN IMPLANTABLE MEDICAL DEVICE - A method for automatic threshold control and detection of lead failure in an implanted medical device obtains three sensing vectors for measurement of an electrocardiogram signal. A dynamic error signal is determined from the vectors, and may be used to set a detection threshold for insufficient ECG signals, and/or to passively monitor the device for indications of lead failure without performing an impedance measurement. Passive mode operation conserves battery power and enables continuous lead integrity checks. A quality factor may also be determined from the error signal, to indicate whether or not signal measurements are valid with respect to noise levels. If the detection threshold is allowed to decay between successive features of the electrocardiogram, the decay rate may be made adaptive such that it automatically adjusts to changes in heart rate or to changes in amplitude of the electrocardiogram features. | 07-12-2012 |
20120179218 | DEFIBRILLATOR HAVING SPECIALIZED OUTPUT WAVEFORMS - An output stage for use in a therapeutic defibrillator enables practical use of specialized output waveforms optimized for cardiac defibrillation. A pulse-width modulated (PWM) switching amplifier, connected to a high voltage source capacitor and to one or more output bridges corresponding to different electrode placements, is adapted to operate with high efficiency, demonstrated at about 80%. The amplifier is capable of delivering a defibrillating electric shock to a heart in the form of a time-varying output voltage waveform of arbitrary shape. Efficiency improvement is accomplished through the use of a high voltage reservoir capacitor network configured to minimize a voltage differential between the high voltage reservoir and the output voltage. The switching amplifier features both step-up and step-down amplifier capability. A PWM control unit is positioned within the circuit so as to reduce complexity by eliminating a need for additional isolation circuitry. | 07-12-2012 |
20120302904 | HEART STIMULATOR AND METHOD FOR A-V DELAY OPTIMIZATION - Exemplary methods and apparatuses are disclosed that provide for determination of an atrio-ventricular delay on a beat-to-beat basis by determining a P-wave duration from electric signals corresponding to electric potentials in a heart, and determining the atrio-ventricular delay on a beat-to-beat basis such that the atrio-ventricular delay for an individual heart cycle depends on the P-wave duration of a same or an immediately preceding heart cycle. | 11-29-2012 |
J. Christopher Moulder, Lake Balboa, CA US
Patent application number | Description | Published |
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20100049290 | MRI COMPATIBLE LEAD - Disclosed herein is an implantable medical lead. In one embodiment, the lead includes a ring electrode, a tip electrode, first and second helically wound coaxial conductor coils, and a distal coil transition. The coils extend between the proximal and distal ends of the lead. The distal coil transition is proximal to the ring electrode and near the distal end and is where the first coil transitions from being outside the second coil proximal of the distal coil transition to being inside the second coil distal of the distal coil transition. | 02-25-2010 |
20100106227 | Systems and Methods for Disconnecting Electrodes of Leads of Implantable Medical Devices During an MRI to Reduce Lead Heating - Systems and methods are provided for reducing heating within pacing/sensing leads of a pacemaker or implantable cardioverter-defibrillator that occurs due to induced loop currents during a magnetic resonance imaging (MRI) procedure, or in the presence of other sources of strong radio frequency (RF) fields. For example, bipolar coaxial leads are described herein wherein the ring conductor of the lead is disconnected from the ring electrode in response to detection of MRI fields so as to convert the ring conductor into an RF shield for shielding the inner tip conductor of the lead so as to reduce the strength of loop currents induced therein and hence reduce tip heating. Techniques are also described herein for selectively disconnecting the tip electrode of the lead during an MRI procedure, except during actual delivery of pacing pulses, so as to permit delivery of individual pacing pulses to pacemaker dependent patients during the MRI. Still other techniques describe the use of both RF shielding and tip switching. | 04-29-2010 |
20100114276 | MRI COMPATIBLE IMPLANTABLE MEDICAL LEAD AND METHOD OF MAKING SAME - An implantable medical lead is disclosed herein. In one embodiment, the lead includes a body and an electrical pathway. The body may include a distal portion with an electrode and a proximal portion with a lead connector end. The electrical pathway may extend between the electrode and lead connector end and include a coiled inductor including a first portion and a second portion at least partially magnetically decoupled from the first portion. The first portion may include a first configuration having a first SRF. The second portion may include a second configuration different from the first configuration. The second configuration may have a second SRF different from the first SRF. For example, the first SRF may be near 64 MHz and the second SRF may be near 128 MHz. | 05-06-2010 |
J. Christopher Moulder, Portland, OR US
Patent application number | Description | Published |
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20100217366 | Implantable Medical Lead Circuitry and Methods for Reducing Heating and/or Induced Current - An implantable medical lead for coupling to an implantable pulse generator may be configured for improved safety. The lead may include: a first electrode; a second electrode in electrical communication with the first electrode; and an active circuit element in electrical communication with the first electrode and the second electrode. The active circuit element may be configured to change an impedance of the lead. The active circuit element may be configured to change the impedance of the lead in response to a pacing signal or a signal having opposite polarity to a pacing signal. A method of using an implantable medical lead for improved safety may include changing an impedance of an implantable medical lead from a relatively high impedance to a relatively low impedance and/or changing an impedance of an implantable medical lead from a relatively low impedance to a relatively high impedance. | 08-26-2010 |
20100228307 | Responding to Partial Lead Failure in an Implantable Cardioverter Defibrillator - An implanted cardioverter defibrillator (ICD) delivers an electrical therapy signal to the heart of a patient. When ventricular fibrillation or another condition of the heart requiring high voltage therapy is sensed, the therapy signal is delivered to the heart. When a partial short-circuit or other low impedance condition occurs, an over-current protection circuit will stop delivery of a shocking pulse. The ICD will then reduce the voltage of the shocking pulse and try again to deliver electrical therapy. This process is repeated until a voltage level is found that is able to deliver the electrical therapy without causing an over-voltage condition. Alternate lead configurations may also be tried in an attempt to find a signal path that is not affected by the low impedance or short-circuit condition. | 09-09-2010 |
20100292596 | System, Method and Computer-Readable Storage Medium For Heart Signal Detection - A system, method and computer-readable storage medium are configured for the detection of electrical signals originating from a human or animal heart. In particular, for monitoring devices, it is desired to obtain electrical signals from a human or animal heart with electrical contacts at the body of an implantable medical device, hence without the need to implant electrical leads to the hearts. Hence, a method, a system and a computer-readable storage medium for detecting electrical signals originating from a human or animal heart is proposed. The method includes the steps of receiving electrical signals in at least two sensing channels, combining the electrical signals for forming a combined channel, extracting a template from the signals of the combined channel, comparing incoming electrical signals with the template, and depending from the result of the comparison, performing at least one of controlling one or more devices and signaling the result. | 11-18-2010 |
20110087114 | Orientation determination for an implantable medical device - An implantable medical device (IMD) is provided which is capable of sensing and determining its orientation, and of determining whether the IMD has been displaced over time away from its original or optimal position. Electronic components of the IMD, including a processor, digital memory, signal conditioning components, and a power supply, are preferably hermetically sealed within a biocompatible housing. At least three subcutaneous electrodes have fixed relative spacing for sensing electrical cardiac activity for various combinations of two electrodes, forming sensing vectors. Amplitude ratios and sign indicators associated with the sensing vectors are compared with a reference to determine an orientation of the device. In one embodiment, a telemetry unit transmits orientation data as a function of time to a remote device, and the remote device compares different stored orientations to detect displacement over time. | 04-14-2011 |
20110112599 | MRI SIGNAL FILTERING FOR IMPLANTABLE MEDICAL DEVICE - A filtering scheme for an implantable medical device mitigates potentially adverse effects that may be caused by MRI-induced signals. In some aspects filtering is provided to attenuate MRI-induced signals on an implanted cardiac lead that is coupled to an implanted device. In some aspects the filter may be configured to complement a capacitor circuit (e.g., a feedthrough capacitor) that reduces the amount of EMI that enters the implanted device via the cardiac lead. In some implementations the filter consists of a LC tank circuit and a series LC circuit, where the LC tank circuit is in series with the cardiac lead and a cardiac stimulation circuit and the series LC circuit is in a shunt configuration across the cardiac stimulation circuit. | 05-12-2011 |
20110125240 | BIOCOMPATIBLE INDUCTOR FOR IMPLANTABLE LEAD AND METHOD OF MAKING SAME - A biocompatible inductor for an implantable medical lead is disclosed herein. In one embodiment the biocompatible inductor may include a biocompatible bobbin and a wire wound about a barrel of the biocompatible bobbin to form a coil. The wire may include an electrically conductive core, an electrically conductive biocompatible jacket extending over the core, and a coating of high dielectric strength insulation material extending over the jacket. Additionally, the biocompatible inductor may include medical adhesive located in gaps within the coil and a polyester shrink tube covering the coil. | 05-26-2011 |
20120158078 | IMPLANTABLE MEDICAL DEVICE VOLTAGE DIVIDER CIRCUIT FOR MITIGATING ELECTROMAGNETIC INTERFERENCE - An RF protection circuit mitigates potentially adverse effects that may otherwise result from electromagnetic interference (e.g., due to MRI scanning of a patient having an implanted medical device). The RF protection circuit may comprise a voltage divider that is deployed across a pair of cardiac electrodes that are coupled to internal circuitry of the implantable medical device. Each leg of the voltage divider may be referenced to a ground of the internal circuit, whereby the different legs are deployed in parallel across different circuits of the internal circuitry. In this way, when an EMI-induced (e.g., MRI-induced) signal appears across the cardiac electrodes, the voltages appearing across these circuits and the currents flowing through these circuits may be reduced. The RF protection circuit may be used in an implantable medical device that employs a relatively low capacitance feedthrough to reduce EMI-induced (e.g., MRI-induced) current flow in a cardiac lead. | 06-21-2012 |
20120215271 | SYSTEMS AND METHODS FOR DISCONNECTING ELECTRODES OF LEADS OF IMPLANTABLE MEDICAL DEVICES DURING AN MRI TO REDUCE LEAD HEATING - Systems and methods are provided for reducing heating within pacing/sensing leads of a pacemaker or implantable, cardioverter-defibrillator that occurs due to induced loop currents during a magnetic resonance imaging (MRI) procedure, or in the presence of other sources of strong radio frequency (RF) fields. For example, bipolar coaxial leads are described herein wherein the ring conductor of the lead is disconnected from the ring electrode in response to detection of MRI fields so as to convert the ring conductor into an RF shield for shielding the inner tip conductor of the lead so as to reduce the strength of loop currents induced therein and hence reduce tip heating. | 08-23-2012 |
20120283589 | ARRHYTHMIA DETECTION BASED ON ACTIVE MUSCLE NOISE DETECTION - Implantable electromedical device or loop recorders or ILRs that solve the problem of very low arrhythmia detection specificities in, i.e., high number of false positives, based on detection and analysis of external noise, specifically muscle noise surrounding the electromedical device. Embodiments generally employ active detection of lead or device movement that induces signal artifacts indicative of external noise. One or more embodiments may detect lead or device movement through use of a piezoelectric transducer, for example located proximally to the device or in the lead of the electromedical. | 11-08-2012 |
20140214108 | IMPLANTABLE MEDICAL DEVICE VOLTAGE DIVIDER CIRCUIT FOR MITIGATING ELECTROMAGNETIC INTERFERENCE - An RF protection circuit mitigates potentially adverse effects that may otherwise result from electromagnetic interference (e.g., due to MRI scanning of a patient having an implanted medical device). The RF protection circuit may comprise a voltage divider that is deployed across a pair of cardiac electrodes that are coupled to internal circuitry of the implantable medical device. Each leg of the voltage divider may be referenced to a ground of the internal circuit, whereby the different legs are deployed in parallel across different circuits of the internal circuitry. In this way, when an EMI-induced (e.g., MRI-induced) signal appears across the cardiac electrodes, the voltages appearing across these circuits and the currents flowing through these circuits may be reduced. The RF protection circuit may be used in an implantable medical device that employs a relatively low capacitance feedthrough to reduce EMI-induced (e.g., MRI-induced) current flow in a cardiac lead. | 07-31-2014 |
20140222098 | IMPLANTABLE STIMULATION DEVICE, STIMULATION SYSTEM AND METHOD FOR DATA COMMUNICATION - An implantable stimulation device including a stimulation module and a data communication module. The stimulation device includes electrodes to delivery stimulation pulses, a voltage source, a DC-blocking capacitor and autoshort switch. The voltage source is connected to the electrodes via stimulation-pulse-switch(s) that controls delivery pacing pulses. The DC-blocking capacitor is connected with the voltage source and an electrode. The autoshort switch allows discharging of the DC-blocking capacitor via the electrodes when closed. The data communication module includes a data transmission control module connected to the autoshort switch and/or the at least one stimulation-pulse-switch, to alternatingly open and close the autoshort switch or the at least one stimulation-pulse-switch respectively, during an autoshort period following the delivery of a stimulation pulse or during a stimulation pulse period, respectively, to modulate an autoshort pulse or a stimulation pulse peak amplitude, respectively. | 08-07-2014 |
20140222110 | IMPLANTABLE MEDICAL DEVICE, MEDICAL SYSTEM AND METHOD FOR DATA COMMUNICATION - An implantable medical device including a data communication device that includes a device to alter and/or generate an oscillatory electric field imposed on body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state. The device that alters an oscillatory electric field modulates an impedance of body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state and within an oscillatory electric field. The device that alters an oscillatory electric field includes a device that generates an oscillatory electric field that is phase-synchronized with an oscillatory electric field imposed on body tissue surrounding the implantable medical device when the implantable medical device is in its implanted state. | 08-07-2014 |
20140236032 | IMPLANTABLE HEART MONITORING DEVICE - An implantable heart monitoring device including a sensing unit, a signal quality analysis unit, and an evaluation unit. The sensing unit is connected to at least one electrode that picks up electric potentials. The sensing unit processes electrical signals corresponding to the electric potentials, and generates sense signals including events corresponding to myocardial contractions. The signal quality analysis unit determines whether a noise condition (NC) and/or a low signal indication is present for an event and generates an indication signal. The evaluation unit evaluates the sense signals and the indication signals, treats a detected event as non-valid if a NC and/or low signal indication signal is present for that event, and uses only intervals defined by two consecutive events which do not have a NC and/or a low signal indication to determine a rate of events of the sense signal. | 08-21-2014 |
20140236034 | METHOD FOR THE DETECTION OF SUBCUTANOUS CARDIAC SIGNALS AND A CARDIAC DEVICE FOR USE IN DETECTING SUBCUTANEOUS CARDIAC SIGNALS - A cardiac device and method for detecting QRS signals within a composite heart signal of a body including providing at least two input heart signals via at least two separate input channels, wherein each of the at least two input heart signals is recorded by pairs of sensing electrodes that have one electrode in common and provided coincidental in time. The cardiac device and method include generating estimated signals from the input heart signals, combining the input heart signals and the estimated signals to a combined input stream (SECG), and detecting the QRS signal by comparing the combined input stream (SECG) to an adaptive detection threshold (ATHR) which adapts throughout time. | 08-21-2014 |
20140309539 | IMPLANTABLE CARDIAC DEVICE ADAPTED TO EXTRACT A PATIENT'S RESPIRATORY WAVEFORMS FROM AN INTRATHORACIC OR INTRACARDIAC IMPEDANCE, PRESSURE AND/OR ACCELEROMETRY INPUT STREAM - An implantable cardiac device is provided. The implantable cardiac device includes a sensing unit adapted to measure an intrathoracic or intracardiac impedance, pressure, and/or accelerometry input stream, which includes a patient's respiratory waveforms. Furthermore, the implantable cardiac device includes a quantizer-unit adapted to sample the input stream with an initial sampling frequency Fs, providing input samples of the input stream. The implantable cardiac device further includes a filter bank | 10-16-2014 |
20150328468 | INNER PACKAGING FOR A STERILIZABLE CONTAINMENT AND STERILIZABLE CONTAINMENT - A sterilizable container for an implantable medical device, including an inner packaging and an outer packaging that encloses said inner packaging. The inner packaging includes an enclosure and at least two electric contacts that are arranged inside the enclosure and that are placed so as to contact an implantable medical device electrode when such implantable medical device is placed in said inner packaging. Each electric contact of said inner packaging is electrically connected to a respective planar electrode arranged at or close to an outer surface of said inner packaging so as to provide a capacitive communication interface. The inner packaging further includes fixture means that are configured to securely hold an implantable medical device in place to ensure electric contact between the at least two electric contacts and a respective implantable medical device electrode when such implantable medical device is placed in the inner packaging. | 11-19-2015 |
J. Christopher Moulder, Portaland, OR US
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20140222109 | IMPLANTABLE MEDICAL DEVICE, MEDICAL SYSTEM AND METHOD FOR DATA COMMUNICATION - An implantable medical device including a data communication device that includes a device that alters an oscillatory electric field imposed on body tissue surrounding the implantable device. The device that alters an oscillatory electric field modulates an impedance of a conductive medium surrounding the implantable device when the implantable device is within an oscillatory electric field. The device that alters an oscillatory electric field includes a device that generates an oscillatory electric field that is phase-synchronized with an oscillatory electric field imposed on a conductive medium surrounding the implantable device. | 08-07-2014 |
Michael J. Moulder, Wilmington, DE US
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20120275066 | GROUNDING SYSTEM FOR PHOTOVOLTAIC ARRAYS - A grounding system for a photovoltaic or solar cell array includes a strap positioned over adjacent solar module frames and a grounding clip positioned between the adjacent solar module frames and a docking support surface. The grounding clip has two regions of upwardly and downwardly extending protrusions and a through-hole disposed between the two regions. Each protrusion has a serrate portion adapted to penetrate through anodized layers of the solar module frames and the docking support surface for the solar module frames. | 11-01-2012 |
Michael Joseph Moulder, Wilmington, DE US
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20130192587 | BALLASTED SOLAR HOT WATER RACKING SYSTEM FOR FLAT PLATE COLLECTORS - A solar ballasted racking system holds hot water flat plate solar collectors in place on flat roofs without penetrating the roof surface. The racking system also holds the collector in place, providing a stable, long-term placement on the roof while protecting the roof surface with foam pads placed under the ballast tray. The ballast tray is built in two sections—one to hold the solar collector in place and a second to act as a wind deflector that deflects the wind off the solar collector. Ballast blocks are added into the ballast tray to hold the collector in place. The racking system may enhance the life of the roof while protecting the roof surface and allowing for lower ballasted weights due to the wind deflector. | 08-01-2013 |
20130200016 | BALLASTED ROOF AND GROUND MOUNTED SOLAR PANEL RACKING SYSTEM - A light weight ballasted solar racking system has light ballasted weight loads and is easy and fast to install. The racking system may be used in roof or ground mount applications to mount thin film and frameless solar modules. The racking system physically attaches to the solar panel at the manufactured mounting holes with a set of struts that then attach to a ballast tray that holds the system in place. A set of struts may determine the degree of angle from about 5 to about 35 degrees, for example. The front of the ballast tray has an air pass way of about 3-5 inches, while the back of the system has about 8-12 inches of space for an air pass way. Multiple racking systems may be linked together, resulting in the need for less ballast weight for each racking system. | 08-08-2013 |
Richard B. Moulder, Anderson, SC US
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20080302441 | STORAGE COMPARTMENT - A storage compartment comprises an external enclosure having an opening and a holding compartment that is capable of being inserted into and withdrawn from the interior of the external enclosure through the opening in the external enclosure. Stored articles are contained within the holding compartment. The external enclosure and the holding compartment have coacting surfaces, and a seal is interposed between those coacting surfaces for sealing off the interior of the holding compartment to the entry of gases when the holding compartment is inserted into the external enclosure and the coacting surfaces of the external enclosure and the holding compartment are brought together in a sealing relationship with the seal. Complementary surfaces at the holding compartment and at the exterior of the external enclosure are in engagement with one another and provide surfaces along which the holding compartment travels when it is inserted into and withdrawn from the interior of the external enclosure. | 12-11-2008 |
20090058247 | DROP-DOWN SHELF - Storage systems are provided with a first shelf and a drop-down shelf. In one example, the storage system includes first and second link members that are each slidably and pivotably attached with respect to the first shelf. Each of the link members is also pivotably attached with respect to the drop-down shelf. In another example, the storage system includes first and second stationary track guides that each extend away from the first shelf. The drop-down shelf includes first and second support structures that are each slidably received in a respective one of the stationary track guides. | 03-05-2009 |
Richard Brian Moulder, Anderson, SC US
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20100123379 | REFRIGERATOR DRAWERS WITH TRIM - An appliance that includes a storage compartment is provided. The appliance comprises either a drawer or a wire basket located in the storage compartment, a handle, and a trim portion. The drawer or basket is configured for storing at least one item and the drawer is movable relative to the storage compartment. The handle is snappingly secured to a peripheral edge of the drawer or basket. The trim portion is snappingly secured to at least one edge of the drawer or basket where the trim portion is secured independently of the handle. In another example, a humidity control device is located on the drawer and is configured to control the humidity within the interior portion of the drawer. A knob that controls the humidity control device is received through a cutout in the trim portion. | 05-20-2010 |
20140339976 | REFRIGERATOR DRAWERS WITH TRIM - An appliance that includes a storage compartment is provided. The appliance comprises either a drawer or a wire basket located in the storage compartment, a handle, and a trim portion. The drawer or basket is configured for storing at least one item and the drawer is movable relative to the storage compartment. The handle is snappingly secured to a peripheral edge of the drawer or basket. The trim portion is snappingly secured to at least one edge of the drawer or basket where the trim portion is secured independently of the handle. In another example, a humidity control device is located on the drawer and is configured to control the humidity within the interior portion of the drawer. A knob that controls the humidity control device is received through a cutout in the trim portion. | 11-20-2014 |
Ronald Moulder, Lakeland, FL US
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20090100778 | FACED FIBERGLASS BOARD WITH IMPROVED SURFACE TOUGHNESS - An insulation product is provided comprising a sheet of randomly oriented fibers bonded by a binder. The sheet has first and second major surfaces and a pair of side portions. A facing layer is bonded to at least one of the major surfaces. A region of the sheet proximate to the facing layer is more puncture resistant than a remainder of the sheet. | 04-23-2009 |
William F. Moulder, Nashua, NH US
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20150145741 | Wideband Simultaneous Transmit And Receive (STAR) Antenna With Miniaturized TEM Horn Elements - An antenna system capable of achieving simultaneous transmit and receive (STAR.) operation over a wide bandwidth includes a ring array of TEM horn elements and a centrally located monocone or bicone antenna. The TEM horn elements each include a capacitive feed. The elements of the ring array are excited using a phasing scheme that results in signal cancellation, at the location of the central element. The ring array may serve as either the transmit antenna or the receive antenna. | 05-28-2015 |