Abstract: Provided is a micropower impulse radar (MIR) pneumothorax detector. The detector includes a processor and a handheld MIR scanner. The handheld MIR scanner includes a device housing, an antenna located within the device housing, circuitry that generates MIR signals, and circuitry that processes received echoes of the MIR signals and provides the processed received echoes to the processor. The processor automatically determines whether a pneumothorax is present based on the processed received echoes of the MIR signals.

Abstract: A system for measuring output power from an antenna. A sensor receives a sample of wireless signals from the antenna and communicates data about the signal back to the transmitter in a manner such that the antenna pattern is undisturbed. An optical coupler, e.g., fiber optic, is used to send data from the sensor to the transmitter. Power for the sensor can be derived parasitically from the wireless signal or can be provided to the sensor optically.

Abstract: Integral electronic security is provided for a remotely placed network device to reduce the risk of theft, vandalism, or tampering. Sensors monitor the environment surrounding the remotely placed network device. When tampering is detected, a message is sent to a monitoring station. Optionally, the network device can clear its own configuration to prevent the loss of sensitive data.

Abstract: A system and method that enables efficient distribution of public warning information using a network infrastructure. Public warning messages are received by a wireless receiver coupled to a network. The wireless receiver broadcasts a message to users on the network responsive to receiving a public warning message.

Abstract: A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time intervals between two pulses, each pulse indicative of a radar frequency and limiting network traffic on a frequency based on a selected bin count.

Abstract: A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. One or more conductive members are included, having an edge displaced from and substantially directed toward the at least one antenna element, and cooperating therewith to establish a multiplicity of hemispherical beam patterns for a wireless signal. Embodiments with a multiplicity of antenna elements exhibit a high degree of isolation between said antenna elements.

Abstract: In a wireless LAN (WLAN), methods, apparatuses and systems directed to facilitating configuration of a wireless network is provided. According to one implementation of the present invention, sensors are used to collect data associated with locations and other properties of access points of the wireless network. The collected data can then be used to assist in automatically configuring one or more aspects of the wireless network. In some implementations, the collected data can be used to dynamically re-configure the wireless network in real time. According to another implementation of the present invention, location computation mechanisms are used to collect data associated with the location of one or more wireless clients, and the data is used to dynamically adjust one or more radio frequency (RF) coverage maps in real time. The revised RF coverage maps can then be used to re-configure one or more operational parameters of the wireless network.

Abstract: A method, apparatus, and carrier medium carrying instructions to assign frequency channels and transmit powers for a plurality of access points of a wireless network. The method includes, until there are no more access points to which to assign a transmit power and frequency channel, selecting a next current access point, determining for a set of at least one transmit power for a set of at least one frequency channel a measure of the quality of the sub-network formed by the current access point and all already-assigned access points an evaluation metric indicative of the quality of the sub-network, and assigning to the current access point the transmit power and frequency channel that minimizes the measure of the quality of the sub-network.

Abstract: Integral electronic security is provided for a remotely placed network device to reduce the risk of theft, vandalism, or tampering. Sensors monitor the environment surrounding the remotely placed network device. When tampering is detected, a message is sent to a monitoring station. Optionally, the network device can clear its own configuration to prevent the loss of sensitive data.

Abstract: A hooked stub collinear array antenna formed from a single conductor. The antenna operates at a design frequency having an associated wavelength. The antenna includes a plurality of radiating elements that are substantially one half the wavelength. The radiating elements are aligned with a longitudinal axis of the antenna. The antenna further includes a delay element connected between each of the plurality of radiating elements. The delay element is aligned with a transverse axis approximately ninety degrees from the longitudinal axis. The delay element extends approximately one quarter of the wavelength from the longitudinal axis and adjacent delay elements of a plurality of delay elements are sequentially rotated at 90 degree intervals relative to each other about the longitudinal axis. The total length of the delay element is approximately one half the wavelength.

Abstract: A hooked stub collinear array antenna formed from a single conductor. The antenna operates at a design frequency having an associated wavelength. The antenna includes a plurality of radiating elements that are substantially one half the wavelength. The radiating elements are aligned with a longitudinal axis of the antenna. The antenna further includes a delay element connected between each of the plurality of radiating elements. The delay element is aligned with a transverse axis approximately ninety degrees from the longitudinal axis. The delay element extends approximately one quarter of the wavelength from the longitudinal axis and adjacent delay elements of a plurality of delay elements are sequentially rotated at 90 degree intervals relative to each other about the longitudinal axis. The total length of the delay element is approximately one half the wavelength.

Abstract: The repetitive structure of a preamble signal is exploited to enhance timing synchronization performance and frame start detection performance under adverse channel conditions. Received values are cross-correlated in time against a known noise-free version of the preamble. The presence of peaks in the cross-correlation output indicates presence of a frame. The peak locations provide symbol timing. Further cross-correlation processing and/or non-linear processing can be used to enhance the signal to noise ratio of the peaks.

Abstract: A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time intervals between two pulses, each pulse indicative of a radar frequency and limiting network traffic on a frequency based on a selected bin count.

Abstract: A system for measuring output power from an antenna. A sensor receives a sample of wireless signals from the antenna and communicates data about the signal back to the transmitter in a manner such that the antenna pattern is undisturbed. An optical coupler, e.g., fiber optic, is used to send data from the sensor to the transmitter. Power for the sensor can be derived parasitically from the wireless signal or can be provided to the sensor optically.

Abstract: The difficulties and drawbacks of the previous-type systems are overcome by the present antenna system, alone and in combination with a wireless access point. The present antenna system includes a plurality of antenna elements for providing a respective plurality of communications signals over a wireless channel. An isolating structure is provided, selectively positioned with respect to the antenna elements, for selective varying signal isolation between the respective antenna elements. In this way, the present system is selectable between a high-throughput/short-range configuration and a low-throughput/long-range configuration.

Abstract: A removable antenna assembly and wireless access point including the same is disclosed in which a plurality of antenna elements are provided for transmitting and receiving wireless signals over a plurality of wireless channels. A sectorized mounting structure is provided for retaining each of the plurality of antenna elements substantially in an antenna isolation configuration, so as to enable simultaneous sectorized signal communication of the antenna elements over the wireless channels. A removable network interface is provided for selectively enabling a signal connection between a radio digital interface component and the plurality of antennas.

Abstract: A multiple element antenna array is disclosed in which a plurality of panels each support one or more antenna elements. One or more of the panels are preferably interlaced, so as to be affixed to a circuit board. The panels are configured so as to affix to the circuit board at a predetermined angle, which is preferably a right angle to the surface of the circuit board. Each antenna element includes a connection point for establishing a circuit board connection. The present multiple element antenna array is preferably incorporated into a wireless device; preferably an access point for a wireless local area network (WLAN). The wireless device further includes a radio transceiver comprising a plurality of circuit elements mounted on the circuit board.

Abstract: A wireless local area network is disclosed which includes a plurality of wireless access points each having a predetermined coverage area, and a plurality of wireless clients for establishing a wireless link with at least one wireless access point. Some or all of the wireless clients are within the respective coverage areas of at least a portion of wireless access points. A load balancer is provided for balancing distribution of wireless clients among wireless access points. The load balancer includes a tracking implementation for tracking at least one telemetry parameter of each wireless client's wireless link with each respective wireless access point. A goal implementation is included for comparing one or more telemetry parameter against at least one predetermined goal to obtain a fitness measure.

Abstract: A two-dimensional array design for an aperiodic array antenna. The design utilizes monopole or similar antenna elements that are arranged into the topology of an Archimedes spiral. The preferred spacing between radial arcs of the spiral is approximately one-half the desired wavelength.