Abstract: A temperature sensing device to sense aircraft wheel brake temperature is disclosed including a sensing device substrate; and one or more package layers attached to the sensing device substrate, wherein: the sensing device substrate carries one or more electronic components for sensing temperature. Also disclosed is a wireless relay device to wirelessly transmit an interrogation signal to a temperature sensing device and wirelessly receive an output signal from the temperature sensing device, the temperature sensing device to sense aircraft wheel brake temperature, the wireless relay device comprising: a relay substrate; and one or more package layers attached to the relay substrate, wherein: the relay substrate carries one or more electronic components of the wireless relay device. Also disclosed is a method of manufacturing a temperature sensing device to sense aircraft wheel brake temperature.

Abstract: A temperature sensing device for sensing aircraft wheel brake temperature is disclosed including a sensor antenna electrically coupled to a surface acoustic wave, SAW, sensor element, wherein: the sensor antenna comprises a conductive loop disposed on a surface of a substrate, the conductive loop surrounding an attachment region of the substrate, the attachment region having substantially no conductor material thereon. Also disclosed is a brake disc for an aircraft wheel brake comprising the temperature sensing device, and aircraft comprising the brake disc and a method of manufacturing a temperature sensing device.

Abstract: A brake disc for an aircraft wheel brake including: a temperature sensing device comprising a surface acoustic wave (SAW) sensor element and a sensor antenna, wherein the temperature sensing device is attached to the brake disc by means of a ceramic adhesive and one or more ceramic bolts. A method of attaching a temperature sensing device to a brake disc of an aircraft wheel brake.

Abstract: A temperature sensing device for sensing aircraft wheel brake temperature, the temperature sensing device including: a surface acoustic wave (SAW) sensor element having an interdigital transducer that has electrodes disposed along the surface of a substrate forming a periodic structure. The electrodes having a thickness, in a direction perpendicular to the surface, of between 120 and 190 nanometres.

Abstract: A holder for a wireless relay device is disclosed including a rigid hollow arm member to be received in a groove in a torque tube spline of an aircraft wheel brake; and a support member to support the wireless relay device, the support member mechanically coupled to the rigid hollow arm member towards a first end of the rigid hollow arm member, wherein: the rigid hollow arm member provides a conduit for a communications cable to couple to the wireless relay device. Also disclosed is an aircraft wheel brake comprising the holder and an aircraft comprising the aircraft wheel brake.

Abstract: A temperature sensing device for sensing aircraft wheel brake temperature, the temperature sensing device including a surface acoustic wave, SAW, sensor element with a resonant frequency within a frequency range between 175 megahertz and 190 megahertz at a predetermined temperature. The temperature sensing system also includes a wireless relay device, a method for sensing temperature of a wheel brake of an aircraft.

Abstract: A cable structure to carry signals to and from a component of a temperature sensing arrangement in an aircraft wheel brake is disclosed including elongate elements including a plurality of cables and/or wires, one or more ceramic spacer layers, a ceramic cover layer and a metallic layer surrounding the one or more ceramic spacer layers and the ceramic cover layer. Also disclosed is an aircraft wheel brake comprising the cable structure and an aircraft comprising the aircraft wheel brake.

Abstract: Methods and systems for attaching a device to a substrate for operation of the device under variable conditions includes attaching a device to a substrate, disposing a removable material over a first portion of the device, positioning a second portion of the device adjacent to the substrate, operably attaching a retainer to the substrate adjacent to the device with a part of the retainer disposed over the removable material, and removing the removable material to form a gap between the device and the retainer so that the device is retained on the substrate, and wherein the gap allows the device to move freely relative to the retainer and the substrate in response to changes in temperature.

Abstract: Surface acoustic wave resonators for use in high temperature applications including a piezoelectric substrate, at least one interdigital transducer supported by the piezoelectric substrate, and a grating reflector supported by the piezoelectric substrate, the grating reflector being fabricated of a heavy metal and comprising a plurality of electrodes, at least one electrode of the plurality of electrodes being electrically isolated from at least one other electrode. Methods of making surface acoustic wave resonators are also included.

Abstract: Methods and systems for attaching a device to a substrate for operation of the device under variable conditions includes attaching a device to a substrate, disposing a removable material over a first portion of the device, positioning a second portion of the device adjacent to the substrate, operably attaching a retainer to the substrate adjacent to the device with a part of the retainer disposed over the removable material, and removing the removable material to form a gap between the device and the retainer so that the device is retained on the substrate, and wherein the gap allows the device to move freely relative to the retainer and the substrate in response to changes in temperature.

Abstract: Surface acoustic wave resonators for use in high temperature applications including a piezoelectric substrate, at least one interdigital transducer supported by the piezoelectric substrate, and a grating reflector supported by the piezoelectric substrate, the grating reflector being fabricated of a heavy metal and comprising a plurality of electrodes, at least one electrode of the plurality of electrodes being electrically isolated from at least one other electrode. Methods of making surface acoustic wave resonators are also included.

Abstract: An ultra-thin film electrode including at least one electrically conductive layer disposed upon an adhesive layer that is carried by a substrate.

Abstract: An ultra-thin film electrode including at least one electrically conductive layer disposed upon an adhesive layer that is carried by a substrate.

Abstract: A Surface Acoustic Wave device including a resonator or a delay line formed from an electrically conductive material having a high melting temperature disposed upon the surface of a substrate formed from one of the LGX family of crystals or gallium phosphate. The Surface Acoustic Wave Device is operative as a sensor at high temperatures.

Abstract: A Surface Acoustic Wave (SAW) Device that includes a substrate formed from a material selected from the LGX family of crystals and having a SAW propagation surface defined by Euler angles relative to the corresponding crystal axes having a range of ?5°<?<+5°, ?5°<?<50° and 80°<?<100°. The device being utilized for liquid sensor applications including the detection of chemical or biological agents present in a liquid environment. The device may or may not include the deposition of one or more chemical and/or biological films upon the propagation surface to enhance the sensitivity thereof. At least one interdigital transducer is formed upon the substrate propagation surface and that is operative to launch surface acoustic waves having a shear horizontal mode.