Abstract: The present invention relates to an apparatus for monitoring physical parameters in an oil and/or gas well, the apparatus being connectable to a wellhead of the oil and/or gas well. The apparatus comprises a flange assembly configured with a through bore and an end termination, in which through bore a sensor and associated electronics are arranged. The sensor, including a first electronic circuitry, is connected to a second electronic circuitry via transmission devices that are passed through a pressure-tight element arranged in the through bore. The invention also relates to a wellhead for use with an oil and/or gas well with a plurality of casings defining a plurality of annili. The wellhead is configured with a plurality of through-holes, each leading into a respective annulus of the well, and each through-hole is connected to an apparatus as mentioned above.

Abstract: A communication system for transmitting information via drilling rod linkages includes a drill drive, drilling rod linkages comprising a first drilling rod linkage and at least one second drilling rod linkage. The first drilling rod linkage comprises an electrical line, an upper end and a lower end which comprises a receptacle for a drill head. The second drilling rod linkage comprises at least one electrical line, an upper end and a lower end. A sensor and/or actuator is arranged at the lower end of the first drilling rod linkage and at the drill head and transmits data. A first communication unit and an electronics unit are arranged at a drive end. A further communication unit is arranged at the upper end of the first drilling rod linkage and at the upper and lower ends of the second drilling rod linkage. The first communication unit and the further communication units are radio modules which transmit/receive data.

Abstract: Certain embodiments of the invention may include systems, methods, and apparatus for automatically configuring a utility meter. According to an example embodiment of the invention, a method is provided for automatically configuring a utility meter. The method can include transmitting formatted data from a utility meter to a remote server. The formatted data includes one or more of: a ready signal, a meter identifier, a location identifier, installed options identifier, firmware version identifier, or configuration table information. The method also includes receiving configuration data from the remote server in response to the transmitted formatted data; and automatically configuring the utility meter with at least a portion of the received configuration data.

Abstract: A parking meter detects an object in proximity, based on a change in a proximity measurement at the meter, activates a directional sensor in response to detecting the object, receives sensor data at a meter processor from the directional sensor, wherein the received sensor data indicates a predetermined direction to the detected object relative to the meter. The parking meter determines a presence of the object, or lack thereof, in the predetermined direction based on the sensor data, and upon a positive determination of the presence of the object, stores an indication of the presence of the object along with a time of the positive determination.

Abstract: Disclosed herein is an advanced metering infrastructure system that includes electronic meters, each of which being configured to measure and store an amount of energy consumed by each customer and provided with a slave communication modem, a data concentrator for collecting meter data from the electronic meters via a master communication modem that performs wired/wireless communication with the slave communication modems of the electronic meters, and a meter reading server for receiving and managing the meter data collected by the data concentrator. The master communication modem and each of the slave communication modems implement mutual communication interfaces using a protocol stack. The protocol stack includes a network layer, an application layer, and a modem performance analysis layer disposed between the network layer and the application layer and configured to analyze quality of a communication link between the master communication modem and each slave communication modem.

Abstract: In an embodiment, a device characterization system includes a sensor to sense an attribute of a device, a processor, and an algorithm executable on the processor to collect time series data of the attribute from the sensor, detect edges in the data, identify clusters from the edges, label the clusters based on input from a supervisor, and estimate device characterization parameters from the clusters.

Abstract: A warning system for pedestrian and vehicular traffic that can warn pedestrians and drivers of an emergency vehicle that is approaching a road intersection. The current warning system is multimodal and uses different modes and colors to indicate the type of approaching emergency vehicle. Flashing devices are mounted to fixtures associated with currently available traffic light configurations.

Abstract: A communication apparatus is installed in a vehicle. A time information obtaining unit obtains a current time. A state information obtaining unit repeatedly obtains state information representing a state of an own vehicle at the current time. An own vehicle information generating unit estimates predicted arrival positions at specific times between the current time and a specified time, and repeatedly generates own vehicle information including the current position and the predicted arrival positions. An information transmitting unit transmits the own vehicle information. An information storage unit stores the own vehicle information into a first storage section as past own vehicle information. The information transmitting unit obtains an information coincidence degree representing the degree of the coincidence between current own vehicle information and the past own vehicle information, and transmits the current own vehicle information if the information coincidence degree is less than a specified threshold.

Abstract: A traffic signal system with dual light sources includes a signal displaying module, an ambient light module and a supplementary light module. The ambient light from environment is assembled by the ambient light module for generating a first light beam. A second light beam is provided by the supplementary light module disposed near the ground for easy maintaining and avoiding danger. The supplementary light module includes a sensor and a control circuit. The sensor senses the brightness of the first light beam passing through the signal displaying module and generates a photosensitive signal. The brightness of the second light beam is regulated by the control circuit according to the photosensitive signal. The brightness of the first light beam is supplied by regulating the brightness of the second light beam, so the signal displaying module has high-brightness light source and achieves the energy conservation.

Abstract: A traffic signal control method comprises confirming the shortest green light interval; confirming the conflict area of the different traffic flow and the key conflict point position according to the engineering design for road canalization; confirming the longest clear distance si(m) of the traffic tail unit of green light i and the shortest entry distance sj(m) of the traffic head unit of green light j in conflict with green light i; calculating the longest clear time Max{ti} of the traffic tail unit of green light i and the shortest entry time Min{tj} of the traffic head unit of green light j; calculating the shortest green light interval Iij=A+Max{ti}?Min{tj}; confirming the control scheme for the crossing according to the shortest green light interval and sending the control instruction to the traffic signal display device for displaying in real time according to the control scheme. A traffic signal control system and special equipment are also provided.

Abstract: System for determining the position of a vehicle comprising a plurality of sensors for measuring the magnetic field strength of a magnet, computation means for determining the position of the magnet with respect to the plurality of sensors wherein the plurality of sensors are arranged in a two-dimensions array.

Abstract: A Device for automatically evaluating an air traffic control message by an aircraft-based component of a flight information system is disclosed. The device comprises means for retrieving the air traffic control message from an aircraft-based system, means for parsing the text of the air traffic control message and means for storing text elements of the air traffic control message into a computer readable memory. Furthermore, it comprises means for retrieving a current flight data of an aircraft, means for determining if there is a mismatch between the stored text elements and the current flight data, the actual flight data comprising at least the current position of the aircraft and means for displaying one or more graphical elements on a moving map display if it is determined that there is a mismatch between the stored text elements and the current flight data.

Abstract: A mechanism for directing a vendor vehicle to an area in a region. A device receives a plurality of search requests from a plurality of corresponding user devices. Each search request includes search request data that includes a location identifier that identifies a location of the corresponding user device in the region at a time of the search request, and one or more user search criteria. The device identifies, based on the plurality of search requests and at least one subset-determination criterion, at least one subset of the plurality of user devices. The device determines at least one determined location within the region based on the corresponding locations of the user devices in the at least one subset. The device sends vehicle positioning information that identifies the at least one determined location to a vendor device associated with the vendor vehicle.

Abstract: Decoder circuits and methods down-sample the samples that oversample an input signal having a differential Manchester encoding. A first input port receives first, second, and third samples. A second input port receives a state indicating whether a clock transition or a data transition precedes the first, second, and third samples. A third input port receives first, second, and third down-sampled bits. A detector circuit is configured to generate a detection signal indicating a presence of a short pulse within the samples when the state indicates the clock transition and the second and third down-sampled bits are equal and differ from the first down-sampled bit and the third sample. A generator circuit is configured to generate a fourth down-sampled bit that equals the third sample when the detection signal indicates the presence of the short pulse, and that equals the second sample when the detection signal does not indicate the presence.

Abstract: A circuit for serializing bits including a clock circuit and a serializer. The clock circuit may be configured to generate a plurality of clock signals from a received master clock signal. A plurality of bits may be transmitted to the serializer in response to a transition of a first clock signal. The serializer may comprise a system of latches and a rotary circuit. The system of latches may be configured to receive a first half of the plurality of bits in response to a first transition of a second clock signal and to receive a second half of the plurality of bits in response to a transition of a third clock signal. The rotary circuit may be configured to receive the plurality of bits from the system of latches and to output each bit at a particular time based on a plurality of rotary clock signals.

Abstract: An encoder for encoding a sequence of symbols is described which includes an assigner configured to assign a number of parameters to each symbol of the sequence of symbols based on information contained within previous symbols of the sequence of symbols; a plurality of entropy encoders each of which is configured to convert the symbols forwarded to the respective entropy encoder into a respective bitstream; and a selector configured to forward each symbol to a selected one of the plurality of entropy encoders, the selection depending on the number of parameters assigned to the respective symbol.

Abstract: A circuit in an analog-to-digital converter (ADC) includes an amplifier configured to receive an output of a backend DAC; a harmonic distortion correction circuit (HDC) coupled to the amplifier and configured to correct distortion components due to the residue amplifier present in a digital signal from the backend ADC, the HDC circuit providing an output to an adder, the adder receiving a coarse digital output from a coarse ADC; and a DAC noise cancellation circuit (DNC) configured to provide an output to the adder, wherein the DNC circuit is configured to correct distortion components due to the DAC present in the digital signal from the backend ADC; wherein the output of the adder is an ADC digital output and wherein the ADC digital output forms an input to the HDC and the DNC.

Abstract: An analog-to-digital converter is provided and comprises a most significant bit (MSB) conversion module, a successive approximation register analog-to-digital converter (SAR ADC) module, and an operation module. The MSB conversion module receives an analog signal to be converted, and converts the analog signal to an MSB with M bits, and obtains a redundancy signal. The SAR ADC module is coupled to the MSB conversion module. The SAR ADC receives the redundancy signal and processes the redundancy signal to be a least significant bit (LSB) with N bits. The operation module is coupled to the MSB conversion module and the SAR ADC module. The operation module receives the MSB with the M bits and the LSB with the N bits and generates a first digital signal with (M+N) bits. Each of M and N is positive, and (M+N) is a positive integer.

Abstract: An ADC which samples an analog input signal at a sampling frequency and converts the analog input signal to a digital output signal, has N analog digital converter (ADC) channels which convert the analog input signal into the digital output signal by time interleaving, a channel synthesizer which synthesizes channel digital signals output respectively by the ADC channels to generate the digital output signal, an adaptive filter provided at at least one output of the ADC channels, and a correction circuit which generates a coefficient of the adaptive filter in accordance with the digital output signal. The correction circuit calculates a DC component of an image signal component, from among an analog input signal component and the image signal component corresponding to error, both being included in the digital output signal, and calculates the coefficient such that the DC component is suppressed on the basis of the DC component.

Abstract: A time-interleaved A/D converter apparatus has a primary signal A/D converter circuit group that is time-interleaved with a combination of N A/D converter circuits, a correction signal generation part operable to receive the input analog signal and a 1/m-sampling signal having a speed that is 1/m of a rate of the sampling signal inputted to the primary signal A/D converter circuit group, to extract a dispersion of a transmission line that is immanent in the input analog signal, and to output the dispersion as a dispersion compensation control signal used for digital signal compensation, and a signal processing part operable to convert the N digital signals into one digital signal based upon the dispersion compensation control signal and to compensate a dispersion included in the converted digital signal.

Abstract: A digital-to-analog converter (DAC) is disclosed. According to some embodiments of the present disclosure, a DAC may include a plurality of current-steering elements, wherein each respective current-steering element is configured to operate as instructed by a respective calibration signal during respective steps in a calibration cycle, and at least one current-steering element is configured to operate as instructed by a first control signal during at least a first step in which the at least one current-steering element is not being calibrated, and operate as instructed by a second control signal during at least a second step in which the at least one current-steering element is not being calibrated.

Abstract: An A/D conversion unit performs an A/D conversion operation twice during a hold period of an analog value. In a first conversion operation, the A/D conversion unit compares the analog value with a first reference voltage and outputs a comparison result as first converted data. In a second conversion operation, the A/D conversion unit compares the analog value with a second reference voltage and outputs a comparison result as second converted data. The second reference voltage is a voltage obtained by adding or subtracting a minimum resolution voltage to or from the first reference voltage. A digital processing unit averages errors of the first and second converted data by digital processing to detect an A/D conversion error, and feeds back a detection result to the A/D conversion unit as a control value to perform voltage control.

Abstract: A fieldbus adaptor connected between a fieldbus that handles a digital signal and a field device that handles an analog signal, the fieldbus adaptor comprising a first connection unit detachably connected to the fieldbus, a second connection unit detachably connected to the field device, and a conversion unit provided between the first connection unit and the second connection unit, the conversion unit bidirectionally converting the digital signal handled by the fieldbus and the analog signal handled by the field device.

Abstract: Certain embodiments of the invention may include systems, methods, and apparatus for sensing AC voltage. According to an example embodiment of the invention, a method is provided for sensing AC voltage. The method includes providing a voltage sensing circuit in communication with an AC power source; rectifying an AC signal from the AC power source with rectifier circuitry of the voltage sensing circuit; applying a first voltage to an analog-to-digital (A-to-D) converter circuit, wherein the first voltage is across a second resistive element of a first half cycle voltage divider comprising a first resistive element and the second resistive element and in communication with a positive DC output of the rectifier circuitry; and analyzing the first digital voltage value and the second digital voltage value by a processor to determine a voltage of the AC power source.

Abstract: There is provided a data conversion method based on negative ?-map suited for an A/D converter or chaos generator, that is adapted to an integrated circuit and capable of providing stable operation of the circuit. The data conversion method based on negative ?-map includes a discrete time integrator 1 having an amplification coefficient s and a damping factor ?, a quantizer 2 connected in series to the discrete time integrator 1, and a feedback circuit connected from an output of the quantizer 2 to an input of the discrete time integrator 1.

Abstract: A radar system (100) is described including a transmitting assembly (10), a receiving assembly (20), a control unit (30) and a signal processing unit (40). The transmitting assembly (10) receives an input signal (31) and transmits an incident radar signal (2). The transmitting assembly (10) includes a Rotman lens (12) having a lens cavity (74), a plurality of beam ports (60), a plurality of array ports (62) and a patch antenna assembly (14). The lens cavity (74) has a lens gap (h) between 10 microns to 120 microns, and preferably 40 microns to 60 microns. The patch antenna assembly (14) includes a plurality of antenna arrays (130) operable to receive a plurality of time-delayed, in-phase signals from the Rotman lens (12) and to transmit the incident radar signal (2) towards a target (4). The receiving assembly (20) receives a reflected radar signal (6) and produces an output signal.

Abstract: A method and apparatus for processing electromagnetic waves. Electromagnetic waves are transmitted in a selected direction toward a target object from a first array of antenna elements. Scattered electromagnetic waves generated from the electromagnetic waves are received at a first portion of a second array of antenna elements configured to receive the scattered electromagnetic waves in a first direction with respect to the selected direction and at a second portion of the second array of antenna elements configured to receive the scattered electromagnetic waves in a second direction with respect to the selected direction. First information in the scattered electromagnetic waves received by the first portion is subtracted from second information in the scattered electromagnetic waves received by the second portion to form difference data. An elevation angle is identified between a direction of the target object and the selected direction using the difference data.

Abstract: A detection and tracking radar includes a hazardous zone set within a preset radius based on a main body having a radar, a plurality of detection and tracking sectors configured to detect a high speed mobile approaching the main body within detection areas, the detection areas being defined by diving the hazardous zone based on an azimuth angle, and a controller configured to recognize the high speed mobile as a target based upon signals received from the detection and tracking sectors and track the target. Accordingly, rapid detection and tracking of the high speed mobile can be allowed. Also, since the detection and tracking sectors can be independently run, expansion of a radar system can be free by virtue of addition of the detection and tracking sectors.

Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.

Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.

Abstract: A global positioning satellite (GPS) receiver that includes a radio frequency (RF) receiver receiving a first GPS signal from a GPS satellite and a processor. The processor is configured to correlate the first GPS signal with a plurality of reference signals to produce a plurality of correlations, detect a transition between receiving the first GPS signal and receiving a second GPS signal from the GPS satellite based on a phase shift in the correlations, and if the transition is detected, compensate for the phase shift when computing a range to the GPS satellite.

Abstract: A receiver for receiving positioning signals from a plurality of sources obtains a pseudorange correction for each source by obtaining an initial pseudorange to each source, an initial value of a positioning parameter based on the initial pseudoranges, a difference between the initial value of the positioning parameter and a reference value of the positioning parameter, a parameter error for each one of the sources, and the pseudorange correction for each source based on the difference between the initial and the reference values of the positioning parameter, the parameter error for the source and the value.

Abstract: The present solution relates to a method in a user equipment (110) for providing navigation signals to a navigator device (104) for use in determining the location of the navigator device. The user equipment (110) selects a plurality of satellites whose signals are to be emulated. After determining the position of the user equipment (110), the user equipment (110) translates the determined position to emulating navigation signals using a parameter derived from each of the respective selected satellites. The user equipment (110) transmits, to the navigator device (104), the emulated navigation signals. The emulated navigation signals enable the navigator device to determine the location of the navigator device (104).

Abstract: Methods and apparatuses are provided for use with mode switchable navigation radios and the like. The methods and apparatuses may be implemented to selectively switch between certain operating modes based, at least in part, a mode-switching test that takes into consideration one or more non-timed test conditions to determine if mode-switching may be enabled.

Abstract: A directive electrically small antenna (DESA) process and method employs multipole synthesis to implement directive electrically small multipole antennas with ultra-wideband (UWB) stable antenna patterns. Although lossy, embodiments have adequate efficiency to work as receive antennas in the high ambient noise environment of the HF band and below. Employing a process dubbed “antenna regeneration,” energy may be circulated within an antenna by means other than resonance. This enables multiple decade UWB response without the efficiency penalties inherent to traditional resistively-loaded antenna systems. Regenerative antennas can simultaneously achieve the performance of high Q resonant antennas and the bandwidth of resistively loaded antennas.

Abstract: A method and an apparatus for aligning a phased array antenna, and a phased array antenna are provided. A method for aligning a phased array antenna according to an embodiment of the present invention includes: receiving signals from respective antenna array subunits; performing phase shifting on the signals from the respective antenna array subunits, combining phase-shifted signals, where the signals are from the respective antenna array subunits, and obtaining a first signal, where a receiving beam corresponding to the first signal is a rotating receiving beam; rotating, by the rotating receiving beam, around a transmitting/receiving beam according to a preset angular frequency by using the transmitting/receiving beam as a rotation axis; calculating power values of respective first signals in a case that the rotating receiving beam rotates through different angles; and adjusting, according to the power values, a direction of the transmitting/receiving beam to align a phased array antenna.

Abstract: According to an embodiment of the present invention an emitter geolocation technique determines the geolocation of a radio frequency (RF) emitter using pair-wise line-of-bearing intersections that are derived from signal-to-noise ratios of transmitted signals received at a sensor. The technique may be employed with ground based vehicle or small unmanned air vehicles (UAV), and obtains reliable geolocation estimates of radio frequency (RF) emitters of interest.

Abstract: A manufacturing method of an antenna structure includes the following steps: producing a main body by injection molding of a first plastic, wherein the first plastic is a plating grade plastic; covering the main body by a second plastic to form a covering layer, wherein plating can not be done for the first and second plastics concurrently; removing a pre-determined portion of the covering layer, wherein a patterned layer is defined by the unremoved portion of the covering layer, wherein at least one trench is formed by the exposed portion of the main body and surrounding patterned layer; and plating an antenna material in the trench to form an antenna. Thus, the instant disclosure can reduce the manufacturing cost of the antenna structure. Based on the preceding manufacturing method, an antenna structure is also disclosed.

Abstract: A dual-band circularly polarized antenna is disclosed, which includes a ground metal plate, a dielectric substrate, a first microstrip radiation portion and a second microstrip radiation portion. The dielectric substrate is formed on the ground metal plate. The first microstrip radiation portion is formed on the dielectric substrate and has at least one pair of symmetric truncated corners. The second microstrip radiation portion is formed on the dielectric substrate and includes a plurality of radiation units. Each of the plurality of radiation units is extended from the first microstrip radiation portion along a first direction.

Abstract: A multiband slot loop antenna apparatus, and methods of tuning and utilizing the same. In one embodiment, the antenna configuration is used within a handheld mobile device (e.g., cellular telephone or smartphone). The antenna comprises two radiating structures: a ring or loop structure substantially enveloping an outside perimeter of the device enclosure, and a tuning structure disposed inside the enclosure. The ring structure is grounded to the ground plane of the device so as to create a virtual portion and an operating portion. The tuning structure is spaced from the ground plane, and includes a plurality of radiator branches effecting antenna operation in various frequency bands; e.g., at least one lower frequency band and three upper frequency bands. On one implementation, a second lower frequency band radiator is effected using a reactive matched circuit coupled between a device feed and a radiator branch.

Abstract: A radio apparatus according to one aspect of the embodiments includes a substrate configured to have a high-frequency circuit formed thereon. The high-frequency circuit includes an electromagnetic wave radiation source to radiate an electromagnetic wave. The radio apparatus also includes a shielding case configured to house the substrate and have a plurality of openings each having a length of half a wavelength of the electromagnetic wave in a direction orthogonal to a polarization of the electromagnetic wave. Each of the openings is provided to make each distance between centers of the openings to be shorter than one wavelength of the electromagnetic wave.

Abstract: The present invention discloses a method and system for testing OTA performance in a multi-antenna system. Multiple antennas are set in an anechoic chamber; a BS simulator is controlled to transmit benchmark test signal to DUT through a channel emulator and antennas; when determining the benchmark test signal does not meet set requirement, the benchmark test signal is adjusted until set requirement is met; corresponding test cases are determined according to different channel models; according to channel models, the channel emulator performs channel simulation processing on test signal output from the BS simulator and sends the test signal to DUT through antennas; after DUT receives the test signal, each OTA performance is tested according to OTA performance test items corresponding to test cases; and DUT is judged to reach the standard when all OTA performances reach the standard. The present invention is easy to implement and has a low cost.

Abstract: Provided is a glass antenna arranged in a space having a narrow opening area in a window glass of a vehicle. A glass antenna (30) is constituted by a linearly extending first antenna element (31), and a second antenna element (32) extending in the opposite direction of the first antenna element and connected to a grounding point (37) provided on an edge of a glass. Third antenna elements (34, 35) respectively intersect a tip (33a) of the first antenna element (31) and a base (33b) of the second antenna element (32), and respectively extend along an opening of a vehicle body (11).

Abstract: An antenna structure for a vehicle may include an electrically conductive structure arranged on two insulating substrate plates that are arranged perpendicularly to each other and intersect each other. A dipole is provided on each electrically conductive structure. The dipoles form a first U-shaped dipole structure on each of the two substrate plates. On an upper edge region of each of the substrate plates, the dipole structure has a line element, and on the lateral regions of the substrate plate, the dipole structure has electrically conductive limbs. The electrically conductive structure has a monopole arranged asymmetrically to the dipole structure for respectively feeding the dipole.

Abstract: An object is to suppress radiation of a cross polarized wave by a microstrip antenna to improve cross polarization discrimination of the traveling wave excitation antenna. A microstrip antenna wherein: a feed line 21 through which a traveling wave propagates, and a radiating element 22 that is excited by the traveling wave are formed on a dielectric substrate 1, and wherein: the radiating element 22 has a radiating part 22A for radiating a co-polarization wave, and an open stub 22B that has a stub length 22A substantially equal to ?g/4 and that extends from the radiating part toward a cross polarization direction. Therefore, without changing an element width Lb of the radiating element 22, radiation of a cross polarized wave by the radiating element 22 can be suppressed to improve cross polarization discrimination.

Abstract: The disclosure provides an antenna feeding structure having a low frequency loop, an intermediate frequency loop, and a high frequency loop, and generates resonance between the inductance of the intermediate frequency loop itself and a capacitive element in the intermediate frequency loop, wherein the antenna feeding structure is configured to be able to adjust the resonance frequency using the area of the loop and the value of the capacitive element, thereby allowing the antenna to have a broadband characteristic, and further, making it possible to easily design an antenna having a desired band.

Abstract: According to one embodiment, an antenna apparatus comprises a leaky coaxial cable, a first housing, a second housing and a connecting unit. The first housing configured to retain a part of one end of the leaky coaxial cable. The second housing configured to retain a part of other end of the leaky coaxial cable. The connecting unit configured to connect the first housing with the second housing such that the direction of the second housing relative to the first housing can be alerted.

Abstract: A wireless communication system, comprises a tower-shaped antenna includes a leaky coaxial cable that leaks a radio wave and a reflective member that reflect the radio wave leaked from the leaky coaxial cable in the direction perpendicular to an axial direction of the leaky coaxial cable.

Abstract: According to one embodiment, an antenna device includes a leaky coaxial cable, an electrical device and a cover. The cover which is formed with a slender internal space having a first and second ends in the length direction and a first and second vent holes that respectively connect the internal space with the outside at each of the neighbourhood of the first and second ends, and houses the leaky coaxial cable and the electrical devices in the internal space.

Abstract: A housing for a wireless communications device includes a metal cover. An aperture is formed in the metal cover adjacent an antenna to limit interference with transmissions through the antenna, while providing structural strength to the housing. The opposing side of the housing is made from a material that allows transmission from the antenna with limited interference, thereby providing omni-directional transmissions.