Watertown, SD — A new video from the National Association of Tower Erectors stresses hazard awareness for technicians who work with small cellular antenna towers on new or existing structures.

FreeCast and Antennas Direct enter into a distribution agreement to pair OTT and OTA products.

A cluster of antennas located on Trunk Island in Harrington Sound are helping BAMZ to track the movements of migratory birds. A spokesperson said, “An inconspicuous cluster of antennas mounted atop an old utility pole on Trunk Island in Harrington Sound is gathering remarkable bird conservation data. “It was erected in August 2019 when BAMZ […]

On the Smithsonian Tropical Research Institute's Barro Colorado Island in the Panama Canal, staff members are taking down a network of seven tall Automated Radio Telemetry System towers used to track animals wearing radio-transmitters. Scientists on the island are switching to GPS and camera trap systems to produce more data with less infrastructure.

The post GPS and camera traps to replace radio antennas in tracking animals on Barro Colorado Island appeared first on Smithsonian Insider.

A hermetic terminal for an active implantable medical device (AIMD), includes an RF distance telemetry pin antenna, a capacitor conductively coupled between the antenna and a ground for the AIMD, and an inductor electrically disposed in parallel with the capacitor and conductively coupled between the antenna and a ground for the AIMD. The capacitor and the inductor form a band pass filter for attenuating electromagnetic signals through the antenna except at a selected frequency band. Values of capacitance and inductance are selected such that the band pass filter is resonant at the selected frequency band. In an alternative form, the band pass filter is coupled in series with the telemetry pin antenna for attenuating MRI signals of a selected frequency band.

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for transmitting an SRS in a multi-antenna system. The method comprises the steps of: acquiring specific information for discriminating a first antenna group and a second antenna group from among a plurality of antennas, wherein said first antenna group includes one or more antennas which are set to a turned-on state to perform communication with a base station, and said second antenna group includes one or more other antennas which are set to a turned-off state; transmitting an SRS to the base station if a predetermined condition is satisfied, under the condition that the second antenna group is set to the turned-off state; and setting the second antenna group to a turned-off state after the transmission of the SRS.

The invention concerns a method for optimizing antenna pattern assignment for a first wireless communication device forming a wireless network with at least one second wireless communication device, each of said communication device being equipped with a multi-sector antenna, an antenna pattern being a combination of said antenna sectors, said communication devices being adapted for sending a request and for receiving a response using a current antenna pattern assignment, said method comprising a step of: evaluating by said first communication device a first value;sending by said first communication device to said second communication device a broadcast request comprising said valuereceiving by said first communication device, a response to said broadcast request, said response being sent by said second communication device, said response depending on a second value evaluated by said second device;Switching or not, by said first communication device, to a new antenna sector assignment depending on said response; According to the invention the first value is evaluated by minimizing a first local function according to the received signal strength received by said first communication device having said current antenna pattern assignment and the second value is evaluated by minimizing a second local function according to the received signal strength received by said second communication device for its own current antenna pattern assignment.

A rover processor determines position of a rover based upon the interaction between multiple antennas located at the rover and multiple antennas located at a base. The rover antennas may include a rover master antenna having a phase center located at the centroid of the antennas patterns of at least two auxiliary rover antennas. The rover processor may determine the position of the rover master antenna based upon the relative positions of at least two rover antennas (e.g., the rover master antenna and at least one rover auxiliary antenna, or at least two rover auxiliary antennas) with respect to at least two antennas of a base transceiver.

Various methods, apparatus, devices and systems are provided for electrically short antennas for efficient broadband transmission. In one example, among others, a system includes a segmentally time-variant antenna and a segment controller that can control conductivity of individual segments of the segmentally time-variant antenna. The conductivity of the individual segments is modulated to allow a pulse to propagate from the proximal end to the distal end of the segmentally time-variant antenna and impede a reflection of the pulse from propagating back to the proximal end of the segmentally time-variant antenna. In another embodiment, a method includes injecting a pulse at a first end of a segmentally time-variant antenna and modulating conductivity of individual segments to allow the pulse to propagate to a second end of the segmentally time-variant antenna and impede a reflection of the pulse from propagating back to the first end.

The invention relates to a method for automatically adjusting a plurality of tunable passive antennas, for instance a plurality of tunable passive antennas of a radio transceiver using several antennas simultaneously. The invention also relates to an automatically tunable antenna array using this method. An automatically tunable antenna array of the invention has 4 user ports, and comprises: 4 tunable passive antennas, the 4 tunable passive antennas operating simultaneously in a given frequency band and forming a multiport antenna array; 4 sensing units; 4 feeders; a signal processing unit delivering a tuning instruction; and a tuning control unit, the tuning control unit receiving the tuning instruction from the signal processing unit, the tuning control unit delivering tuning control signals to the tunable passive antennas, the tuning control signals being determined as a function of the tuning instruction.

A device comprising: a substrate; a transmit antenna fabricated on the substrate and configured to transmit radio-frequency (RF) signals; a receive antenna fabricated on the substrate and configured to receive RF signals; and circuitry, disposed on the substrate and differentially coupled to the transmit and receive antennas, and configured to provide to the transmit antenna RF signals to be transmitted by the transmit antenna and to process RF signals received by the receive antenna, wherein the substrate comprises material for reducing harmonic coupling between the transmit antenna and the receive antenna.

Reconfigurable antennas in an ad-hoc network are provided where all nodes employ MIMO/SIMO/MISO communication techniques. Three types of reconfigurable antennas: Reconfigurable Printed Dipole Array (RPDA), Reconfigurable Circular Patch Antenna (RCPA) and Two-Port Reconfigurable CRLH Leaky Wave Antennas are used. The RPDA, RCPA and the CRLH Leaky Wave antennas have a different number of configurations as well as different degrees of pattern diversity between possible configurations. To effectively use these antennas in a network, the performance of centralized and decentralized antenna configuration selection schemes are quantified for reconfiguration at one or both link ends. The sum capacity of the network is used as a metric to quantify the performance of these antennas in measured and simulated network channels.

A surface scattering antenna with a tightly-coupled or tightly-connected array of radiators provides an adjustable antenna with broadband instantaneous bandwidth.

Amin Ravan, a citizen of Iran, and his Iran-based company, IC Market Iran, have been charged in an indictment unsealed today with conspiracy to defraud the United States, smuggling, and violating the Arms Export Control Act in connection with the unlawful export of 55 military antennas from the United States to Singapore and Hong Kong.

OTA characterization of phased array antennas and antenna in package (AIP)

IEEE / Institute of Electrical and Electronics Engineers Incorporated

IEEE / Institute of Electrical and Electronics Engineers Incorporated

IEEE / Institute of Electrical and Electronics Engineers Incorporated

IEEE / Institute of Electrical and Electronics Engineers Incorporated