摘要:
Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias results in low noise detectors that alleviate the need for expensive and heat generating low noise amplifiers or Dicke switches in the imager. BTD detectors are installed on a printed circuit board using flip chip packaging technology and horn antennas direct the waves toward the flip chip including the BTD detectors. The assembly of the horn antennas, flip chips, printed circuit board substrate, and interconnects together work as an imaging sensor. Corrugated surfaces of the components prevent re-radiation of the incident waves.
摘要:
Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias results in low noise detectors that alleviate the need for expensive and heat generating low noise amplifiers or Dicke switches in the imager. BTD detectors are installed on a printed circuit board using flip chip packaging technology and horn antennas direct the waves toward the flip chip including the BTD detectors. The assembly of the horn antennas, flip chips, printed circuit board substrate, and interconnects together work as an imaging sensor. Corrugated surfaces of the components prevent re-radiation of the incident waves.
摘要:
A scheme is provided for conserving power in client terminals and/or reducing latency in wireless systems by using a proxy device. The client terminal may have a primary communication interface for communications with an access node and a secondary communication interface to communicate with the proxy device. The client terminal may indicate to the access node a short cycle rate for monitoring its signaling/control channel(s). The client terminal may the power off its primary communication interface without informing the access node. Prior to powering off its primary communication interface, the client terminal may assign the proxy device to act as its proxy and monitor the signaling/control channel with the access node. The proxy device monitors the signaling/control channel(s) according to the indicated short cycle rate. Upon detection of a message for the client terminal, the proxy device forwards the message to the client terminal via a secondary communication interface.
摘要:
A method for assembling an electronic system with a plurality of layers. Recesses in formed in one or more dielectric layers and electronic components are positioned within the recesses. One or more layers containing the components are placed on a host substrate containing host circuits. Electrical interconnects are provided between and among the electronic components in the dielectric layers and the host circuits. The layers containing the components may also be provided by growing the electronic devices on a growth substrate. The growth substrate is then removed after the layer is attached to the host substrate.
摘要:
A heterogeneous integrated circuit and method of making the same. An integrated circuit includes a surrogate substrate including a material selected from the group consisting of Group II, Group III, Group IV, Group V, and Group VI materials and their combinations; at least one active semiconductor device including a material combination selected from the group consisting of Group IV-IV, Group III-V and Group II-VI materials; and at least one transferred semiconductor device including a material combination selected from the group consisting of Group IV-IV, Group III-V and Group II-VI materials. The at least one active semiconductor device and the at least one transferred device are interconnected.
摘要:
Electronically tunable and reconfigurable hyperspectral IR detectors and methods for making the same are presented. In one embodiment, a reconfigurable hyperspectral sensor (or detector) detects radiation from about 0.4 μm to about 2 μm and beyond. This sensor is configured to be compact, and lightweight and offers hyperspectral imaging capability while providing wavelength agility and tunability at the chip-level. That is, the sensor is used to rapidly image across diverse terrain to identify man-made objects and other anomalies in cluttered environments.
摘要:
An integrated communication device having a substrate layer of substantially electrically nonconductive material with two substantially parallel surfaces, an antenna element disposed on one of the surfaces, a ground layer of substantially electrically conductive material disposed on the other surface and having an opening formed therethrough opposite from the antenna element, and a transceiver device mounted to the ground layer to transmit and/or receive electromagnetic energy through the opening.
摘要:
A method for assembling components on a substrate including the steps of: (a) selectively coating at least a first receptor site of the substrate with a liquid precursor that forms a solid adhesive upon contact with an initiator; (b) providing each of the components with an adhesion surface that has the initiator; and (c) depositing the components on the substrate in a manner that causes a first of the components to contact the at least first receptor site whereupon contact between the initiator and the liquid precursor causes formation of the adhesive which affixes the first compound to the first receptor site. In a preferred embodiment of the invention, the precursor is a liquid monomer and the initiator initiates a polymerization reaction upon contact with the monomer to form a solid polymer.
摘要:
An interface material employing carbon nanotube (CNT) array and a method of fabricating the same. A first CNT array is provided on a first substrate. A second CNT array is provided on a second substrate. A first support layer is disposed on the first CNT array, wherein the first CNT array is between the first support layer and the first substrate. A second support layer is disposed on the second CNT array, wherein the second CNT array is between the second support layer and the second substrate. The first support layer is attached to the second support layer. The first and second substrates are removed, thereby providing the interface material.
摘要:
Electronically tunable and reconfigurable hyperspectral IR detectors and methods for making the same are presented. In one embodiment, a reconfigurable hyperspectral sensor (or detector) detects radiation from about 0.4 μm to about 2 μm and beyond. This sensor is configured to be compact, and lightweight and offers hyperspectral imaging capability while providing wavelength agility and tunability at the chip-level. That is, the sensor is used to rapidly image across diverse terrain to identify man-made objects and other anomalies in cluttered environments.