Abstract: A feed-forward cancellation system includes a transmitting element and a receiving element. The transmitting element is in electrical communication with a transmitting line. The transmitting element is configured output a transmission signal to the transmitting line. The receiving element is in electrical communication with a receiving line. The receiving element is configured to process a response signal that is generated in response to the transmission signal and that is delivered to the receiving line. At least one antenna is configured to transmit the transmission signal, receive the response signal generated based on the transmission signal, and deliver the response signal to the receiving line. The feed-forward cancellation system further includes an electronic cancellation unit configured to generate a cancellation signal based on the transmission signal. The cancellation signal eliminates saturation from at least one of the response signal and the receiving line.

Abstract: A wideband radio frequency (RF) interference cancellation system includes an electronic channel canceller configured to split an electronic reference signal output from an electronic transmitting element into a plurality of band signals. At least one electronic band pass filter is configured to receive a respective band signal delivered to a respective channel. The wideband RF interference cancellation system further includes at least one electronic tunable cancellation element configured to tune the respective channel such that reflections are canceled before being input to receiving element.

Abstract: A wideband radio frequency (RF) interference cancellation system includes an electronic channel canceller configured to split an electronic reference signal output from an electronic transmitting element into a plurality of band signals. At least one electronic band pass filter is configured to receive a respective band signal delivered to a respective channel. The wideband RF interference cancellation system further includes at least one electronic tunable cancellation element configured to tune the respective channel such that reflections are canceled before being input to receiving element.

Abstract: A feed-forward cancellation system includes a transmitting element and a receiving element. The transmitting element is in electrical communication with a transmitting line. The transmitting element is configured output a transmission signal to the transmitting line. The receiving element is in electrical communication with a receiving line. The receiving element is configured to process a response signal that is generated in response to the transmission signal and that is delivered to the receiving line. At least one antenna is configured to transmit the transmission signal, receive the response signal generated based on the transmission signal, and deliver the response signal to the receiving line. The feed-forward cancellation system further includes an electronic cancellation unit configured to generate a cancellation signal based on the transmission signal. The cancellation signal eliminates saturation from at least one of the response signal and the receiving line.

Abstract: A system and method for calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna including a plurality of sub-arrays, each sub-array including a plurality of antenna elements. A complex correction coefficient is determined for correcting a phase and amplitude of one antenna element of the antenna elements in a first sub-array of the sub-arrays. This correction coefficient is then applied to a plurality of the antenna elements in the first sub-array. Therefore, automatic calibration of an entire sub-array of an electronically scanned antenna may be accomplished in the field without the requirement for special test equipment, and with a reduced time and energy requirement because calibration of each individual antenna element in the replaced sub-array is not required.

Abstract: A system and method for calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna including a plurality of sub-arrays, each sub-array including a plurality of antenna elements. A complex correction coefficient is determined for correcting a phase and amplitude of one antenna element of the antenna elements in a first sub-array of the sub-arrays. This correction coefficient is then applied to a plurality of the antenna elements in the first sub-array. Therefore, automatic calibration of an entire sub-array of an electronically scanned antenna may be accomplished in the field without the requirement for special test equipment, and with a reduced time and energy requirement because calibration of each individual antenna element in the replaced sub-array is not required.

Abstract: An array antenna with an embedded subaperture includes an array of radiator elements. The array includes a subaperture of one or a group of the radiator elements. A main receive channel is coupled to at least some of the radiator elements by a feed network. An RF power dividing network is connected in a signal path between the subaperture and the special use receive channel, and is adapted to allow at least most of the RF energy from the subaperture to pass to the special use receiver channel while diverting a small amount of energy to the main receive channel. The array includes circuitry for introducing an amplitude taper to signals received from the array of radiator elements, so that some of the signals from the radiator elements are attenuated to achieve the amplitude taper.

Abstract: An array antenna with an embedded subaperture includes an array of radiator elements. The array includes a subaperture of one or a group of the radiator elements. A main receive channel is coupled to at least some of the radiator elements by a feed network. An RF power dividing network is connected in a signal path between the subaperture and the special use receive channel, and is adapted to allow at least most of the RF energy from the subaperture to pass to the special use receiver channel while diverting a small amount of energy to the main receive channel. The array includes circuitry for introducing an amplitude taper to signals received from the array of radiator elements, so that some of the signals from the radiator elements are attenuated to achieve the amplitude taper.

Abstract: A method of monitoring the availability of a network on a monitor web page, includes the steps of: reading query information and depositing query requests into a corresponding one of a plurality of request queues; reading the query requests from the corresponding request queue and sending the query requests to at least one remote network device by sending calls over the IP or SNA network; receiving a reply to the calls from the at least one remote network device indicating an availability status of the at least one remote network device and processing the availability status; depositing the processed availability status in a Web Site Queue; and retrieving the processed availability status from the Web Site Queue and displaying status information for the at least one network device on the monitor web page, the status information being derived from the processed availability status.

Abstract: A method of monitoring the availability of a network on a monitor web page, includes the steps of: reading query information and depositing query requests into a corresponding one of a plurality of request queues; reading the query requests from the corresponding request queue and sending the query requests to at least one remote network device by sending calls over the IP or SNA network; receiving a reply to the calls from the at least one remote network device indicating an availability status of the at least one remote network device and processing the availability status; depositing the processed availability status in a Web Site Queue; and retrieving the processed availability status from the Web Site Queue and displaying status information for the at least one network device on the monitor web page, the status information being derived from the processed availability status.