| Patent application number | Description | Published |
|---|
| 20080252393 | Balun circuit suitable for integration with chip antenna - A balun including a single-ended port, a differential port and first and second sets of coupled transmission line sections. Each set has three coupled transmission line sections. The signal carrying terminal of the single-ended port is connected to an inner end of a third coupled transmission line sections in one of the sets, and the terminals of the differential port are connected to a respective outer end of a respective first transmission line. The balun is fabricated in a multi-layer insulating substrate with the single-ended port located on an upper surface of the substrate and the differential port located on a lower surface of the substrate. The balun is suitable for connection to a chip antenna mounted on a common carrier substrate. | 10-16-2008 |
| 20090243937 | Two-tier wide band antenna - A two-tier wideband antenna comprising a chip of a dielectric material with an upper radiating structure and a lower radiating structure, the dielectric chip being mounted on an insulating carrier substrate which includes a feed-line to connect the antenna to a transceiver device. The lower radiating structure comprises two side elements which have a large aspect ratio so as to reduce the frequency of the lower band edge of the frequency response of the antenna when compared with the frequency response of a monopole patch antenna fabricated on a similar dielectric chip. The antenna of the present invention is suitable for operation over an ultra wideband, e.g. a frequency range extending from 3.1 to 10.6 GHz | 10-01-2009 |
| 20100194489 | Directional coupler including impedance matching and impedance transforming attenuator - The present invention provides a compact weakly coupled directional coupler combined with an integrated impedance transformation and matching circuit where the impedance transformation and matching circuit facilitates the fabrication of a highly miniaturized directional coupler with optimum electrical performance where the physical dimensions of the coupled transmission lines fall inside the constraints of the fabrication process. | 08-05-2010 |
| 20110090762 | Underwater navigation system - The present invention provides an underwater navigation system which can determine the bearing and the range of a remotely located beacon from a navigation station. The remotely located beacon transmits a pair of signals each having a different propagation velocity. Typically, the pair of signals are an acoustic signal and an electromagnetic signal. The range of the beacon to the navigation station is determined by a time differential in the detection of the two signals at the navigation station. The time differential is alternately a variation in phase between the two signals, or a time difference between the reception of a timing event encoded in synchronization on the pair of signals. In one form, the navigation station is a mobile unit which navigates to the remotely located beacon, and in another form the navigation station has a fixed position, and the remotely located beacon is mobile. | 04-21-2011 |
| 20110133726 | Precision alignment system - The present invention provides a precision alignment system operable to provide alignment of a first and second apparatus. The precision alignment system makes use of inductive coupling between loop antennas in the first and second apparatus. The mechanism for alignment is the detection of a null in the signal induced in the loop antennas of the second apparatus arising from an input signal fed to a loop antenna of the first apparatus. The precision alignment system can be incorporated in a system for the wireless transfer of electrical power or may be incorporated in a system for the transfer of data. The precision alignment system of the present invention is particularly suited to applications where optical or other means for alignment of two apparatus are unreliable. In particular, the alignment system disclosed is suitable for operation underwater. | 06-09-2011 |
