Abstract: A repeater (10) for relaying telecommunication signals (20) between a base station (30) and a plurality of mobile users (40) is disclosed. The repeater (10) comprises a down converter (110) for converting the telecommunications signals (20) to an intermediate frequency (IF) from a transmission frequency and an up converter (150) for converting the telecommunication signals (20) from an intermediate frequency to the transmission frequency. An IF beamforming processor network (210) arranged between the downconverter (111) and the up converter (150).

Abstract: Apparatus, systems, and methods are disclosed. In some embodiments, an apparatus comprises a stabilizer element attached to a downhole tool housing. The stabilizer element includes at least a portion of a surface that is not parallel to a longitudinal axis of the tool housing, and that does not contact a borehole wall during operation. An electrode element is attached to the portion of the surface.

Abstract: A transmitter/receiver (a transceiver) having: a digital synthesizer signal generator (101) to generate multiple references signals from a reference clock signal (111), a plurality of transmitters/receivers (103) where each generating corresponding reference signal from the transmitter/receiver reference signals, an up/down convert the transmit/receive signal using the corresponding reference-signal, wherein a plurality of antennas (105) coupled to the at least one transmitter/receiver of the plurality of transmitters/receivers (103).

Abstract: A radio frequency (RF) predistortion linearizer with a transistor and a control circuit, an input matching circuit and an output matching circuit. The control circuit is electrically coupled to a control voltage source that supplies control voltages via a control node. A resistor and a coupling inductor electrically couples the control circuit to the control node to receive the control voltages. These control voltages set two varactors of the control circuit to provide a capacitance. The capacitance and an inductance provided by an inductive block of the control circuit can thus provide a resonant frequency. This resonant frequency is thus controllable and is based on a centre frequency of an RF input signal provided to an input node of the RF predistortion linearizer.

Abstract: A suspended plate antenna for broadband applications is disclosed. The antenna comprises a plate radiator, a slot cut in the plate radiator, and a substantially balanced feeding structure symmetrically feeding the plate radiator with respect to at least one midline of the plate radiator.

Abstract: A suspended plate antenna for broadband applications is disclosed. The antenna comprises a plate radiator, a slot cut in the plate radiator, and a substantially balanced feeding structure symmetrically feeding the plate radiator with respect to at least one midline of the plate radiator.

Abstract: An RF transponder having an antenna comprising at least two ports operable to receive signals such that, in use, the signals in combination establish at least two current nulls on the antenna, each of the ports being located substantially at a current null.

Abstract: A broadband plate antenna (402) is disclosed, which includes a ground conductor (407) and a radiating element (406) which is separated from the ground conductor (407). The antenna also includes an impedance matching stub (404) electrically coupled to the radiating element (406), and means for feeding the radiating element (406), wherein the means for feeding includes a feed point (410) disposed on the impedance matching stub (404).

Abstract: A rectifying antenna circuit for a passive RF transponder comprising a series resonant circuit of an antenna, a voltage rectifier circuit including a diode and a capacitance shunting the diode, the capacitance providing a primary voltage amplification role and the diode providing a rectification and a voltage amplification role.

Abstract: An RF identification transponder comprises a substrate layer, and an array of M*N antenna elements formed on the substrate layer, where M and N are integers. The antenna elements have a common predetermined resonant frequency f.sub.r. The resonant frequency of the transponder's antenna element array allows it to be identified apart from other transponders, each having an antenna element array with a different resonant frequency.