A device for the detection of an ultra wide band signal, including a signal reception circuit, a signal divider circuit to divide the received signal into several frequency sub-bands, a circuit to determine the amplitude and duration of the received signal in each frequency sub-band, a circuit to compare the amplitude of the signal received in each frequency sub-band with an amplitude threshold, a circuit to compare the duration of the signal received in each frequency sub-band with a time threshold, and a decision circuit that determines that the received signal is of the ultra wide band type if the amplitude of the signal received in each frequency sub-band is higher than the amplitude threshold and if the duration of the signal received in each frequency sub-band is less than the time threshold.

A device for the detection of an ultra wide band signal, including a signal reception circuit, a signal divider circuit to divide the received signal into several frequency sub-bands, a circuit to determine the amplitude and duration of the received signal in each frequency sub-band, a circuit to compare the amplitude of the signal received in each frequency sub-band with an amplitude threshold, a circuit to compare the duration of the signal received in each frequency sub-band with a time threshold, and a decision circuit that determines that the received signal is of the ultra wide band type if the amplitude of the signal received in each frequency sub-band is higher than the amplitude threshold and if the duration of the signal received in each frequency sub-band is less than the time threshold.

An antenna unit is included in a transmitter configured to transmit data. The antenna unit includes a loop antenna and a helical parasitic element. The loop antenna is disposed within a housing of the transmitter and is supplied with power. The helical parasitic element is disposed outside the housing. The helical parasitic element is electromagnetically coupled to the loop antenna and includes two open ends.

A wheel unit antenna for use in a TPMS and corresponding wheel structure, in which the antenna is sized and oriented such that complete wheel structure including tire will act as a waveguide. The antenna may be non-resonant, in the form of a monopole perpendicular to a ground plane. In addition, the antenna has a length substantially shorter than a quarter wavelength, for example ?/10 or less.

An antenna includes: a connection device for connection with an electronic device; a cable connected to the connection device; and a high-frequency cutoff unit that is formed of a material having high impedance in a high frequency and disposed at a given position of the cable. The cable with a length defined by the high-frequency cutoff unit functions as an antenna.

An antenna includes: a connection device for connection with an electronic device; a cable connected to the connection device; and a high-frequency cutoff unit that is formed of a material having high impedance in a high frequency and disposed at a given position of the cable. The cable with a length defined by the high-frequency cutoff unit functions as an antenna.

An instrument system for locating leakage at a subscriber's premises is disclosed.

Many embodiments provide a frequency comb receiver that includes a PIN diode, a THz pulse generator block that generates THz tones (LO) for coherent frequency comb detection, an on-chip antenna for broadband detection and a driver stage switched by a series of buffers, where a repetition rate of the LO tones are tunable over a range and determines a spacing between two adjacent tones in the corresponding frequency comb.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of subwavelength antennas formed on the substrate having rotational symmetry, Cn, of order n greater than or equal to 3 and rotational symmetry cycle 2/, which are excitable by near infrared (NIR)_pump radiation to radiate THz radiation having wavelengths that are substantially larger than characteristic dimensions of the subwavelength antenna; wherein the array comprises a plurality of sections each comprising plurality of subwavelength antennas exhibiting a spatial pattern different from that of an adjacent section of the plurality of sections.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of subwavelength antennas formed on the substrate having rotational symmetry, Cn, of order n greater than or equal to 3 and rotational symmetry cycle 2/, which are excitable by near infrared (NIR)_pump radiation to radiate THz radiation having wavelengths that are substantially larger than characteristic dimensions of the subwavelength antenna; wherein the array comprises a plurality of sections each comprising plurality of subwavelength antennas exhibiting a spatial pattern different from that of an adjacent section of the plurality of sections.