Abstract: A 24 GHz band-pass filter includes a step impedance resonator, a first U-shape feeding portion, a second U-shape feeding portion, short-circuit stubs and open-circuit stubs. The step impedance resonator includes a first main portion, a second main portion, and a connection portion for connecting the main portions to each other. The first main portion and the second main portion are electrically connected to a first signal input/output port and a second signal input/output port. The first U-shape feeding portion is electrically connected between the first main portion and the first signal input/output port. The second U-shape feeding portion is electrically connected between the second main portion and the second signal input/output port. The short-circuit stubs are electrically connected to coupling segments of the step impedance resonator. The open-circuit stubs are electrically connected to the first U-shape feeding portion and the second U-shape feeding portion.

Abstract: Semiconductor devices and methods of fabrication are described herein. The method includes steps for patterning fins in a multilayer stack and forming an opening in a fin and into a substrate as an initial step in forming a source/drain region. A first semiconductor material is epitaxially grown from channels exposed along sidewalls of the opening to form first source/drain structures. A second semiconductor material is epitaxially grown from the first semiconductor material to form a second source/drain structure over and to fill a space between the first source/drain structures. A bottom of the second source/drain structure is located below a bottommost surface of the first source/drain structures. The second semiconductor material has a greater concentration percentage by volume of germanium than the first semiconductor material. A stack of nanostructures is formed by removing sacrificial layers of the multilayer stack, the second semiconductor material being electrically coupled to the nanostructures.

Abstract: A biomass treatment method includes steps as follows. A biomass and sodium percarbonate are provided, wherein the biomass includes hemicellulose, cellulose and/or lignin. The biomass and the sodium percarbonate are mixed.

Abstract: Semiconductor structures and methods for manufacturing the same are provided. The semiconductor structure includes a first channel member suspended over a substrate and a second channel member suspended over the first channel member and spaced apart from the first channel member along a first direction. The semiconductor structure also includes a gate structure wrapping around the first channel member and the second channel member and a dielectric structure encircled by the first channel member, the second channel member, the gate structure, and the source/drain structure. In addition, the dielectric structure includes a porous material or an air gap. The semiconductor structure also includes a first epitaxial layer attached to the first channel member, and the first epitaxial layer has a first extending portion protruding from a bottom surface of the first channel member along the first direction and extending into the dielectric structure.

Abstract: In an embodiment, a method includes: forming a fin extending from a substrate, the fin having a first width and a first height after the forming; forming a dummy gate stack over a channel region of the fin; growing an epitaxial source/drain in the fin adjacent the channel region; and after growing the epitaxial source/drain, replacing the dummy gate stack with a metal gate stack, the channel region of the fin having the first width and the first height before the replacing, the channel region of the fin having a second width and a second height after the replacing, the second width being less than the first width, the second height being less than the first height.

Abstract: Semiconductor structures and methods of forming the same are provided. In an embodiment, an exemplary semiconductor structure includes a vertical stack of channel members disposed over a substrate, a gate structure wrapping around each channel member of the vertical stack of channel members, a source/drain feature coupled to the vertical stack of channel members and adjacent the gate structure; and a dielectric feature disposed between the source/drain feature and the substrate, in a cross-sectional view, the dielectric feature includes a V-shape sidewall surface.

Abstract: A ferroelectric memory device and a semiconductor die are provided. The ferroelectric memory device includes a gate electrode; a channel layer, overlapped with the gate electrode; source/drain contacts, in contact with separate ends of the channel layer; a ferroelectric layer, lying between the gate electrode and the channel layer; and a first insertion layer, extending in between the ferroelectric layer and the channel layer, and comprising a metal carbonitride or a metal nitride.

Abstract: An interactive exercise apparatus for guiding a user to perform an exercise includes a display device and a detecting device. The display device is configured to display video imagery which shows an instructor image and at least one motion check image. The motion check image corresponds to a predetermined one of a plurality of body parts of the user, which has a motion guide track and a motion achievement evaluation. The detecting device is configured to detect displacement of the body parts. The motion guide track is displayed on a predetermined position of the video imagery with a predetermined track pattern, corresponding to a movement path of the predetermined body part when the user follows movements demonstrated by the instructor image to perform the exercise. The motion achievement evaluation indicates a matching degree determined according to the displacement of the predetermined body part detected by the detecting device.

Abstract: An appressed antenna includes an antenna housing and a metal shell. The antenna housing comprising a housing and a planar antenna, where the planar antenna is bent with one part folded onto the inner surface of the housing and other part pressed onto the outer surface of the housing. The antenna housing is sleeve fitted to the metal shell with a gap between for the planar antenna to radiate. In this all-metal environment, the position of the antenna is close to the gap opening will increase radiation efficiency. By having at least a branch at the tail end of the appressed antenna, the appressed antenna can have a good return loss and antenna gain.

Abstract: A patch antenna includes a dielectric substrate formed by a high dielectric coefficient material covered with a soft material. The dielectric substrate has a first surface, an opposite second surface, and surrounding side surfaces there between. The patch antenna further includes a radiating metal arm formed on at least the first surface with a thin metal layer in a specific shape, a grounding metal plate disposed on the second surface, and a parasitic metal arm extending from the grounding metal plate towards the first surface via at least one of the side surfaces. The parasitic metal arm is approximate but not connected to the radiating metal arm. The radiation metal arm further includes an enclosed slot, together with the parasitic metal arm, improve the working bandwidth and high directivity of the antenna.

Abstract: An array antenna of a radar includes a liquid crystal polymer (LCP) substrate with antenna transceiver circuits embedded. A plurality of patch array antennas are disposed on the LCP substrate and connected to the antenna transceiver circuit. Each patch array antenna includes a plurality of patch antennas connected in series, and the foremost patch antenna has a concave slot on the radiating surface by each side of respective feed line. By use of a LCP substrate can ensure stable material characteristics in different environments. Compared with a single patch antenna, the gain may be improved by 6 dB by connecting four patch antennas in series. A concave slot is formed on a radiating surface of a patch antenna to optimize a feed impedance, thereby to improve a working bandwidth of the antenna to alleviate an excessively narrow bandwidth of a patch antenna.

Abstract: An antenna test system includes a box body, a supporting device, at least one probe device, a signal measuring device, and a moving device. The box body has at least an operation side configured to be opened to allow access to devices inside the box body. The supporting device is disposed in the box body and the antenna circuit to be tested is arranged thereon. The probe device is disposed in the box body and configured to apply an antenna testing signal to the antenna circuit to emit an antenna working signal. The signal measuring device is disposed in the box body to receive the antenna working signal emitted from the antenna circuit. The moving device is disposed in the box body and configured to carry the signal measuring device to maneuver in three directions of X-axis, Y-axis, and Z-axis to receive the antenna working signal in different positions.

Abstract: An array antenna includes a flexible substrate formed by stacked liquid crystal polymer (LCP) layers and has at least one feed point. At least one serial antenna is arranged on the flexible substrate, and a microstrip is extended from the feed point to connect a plurality of radiating elements in series to form the serial antenna. The tail end one of the radiating elements of the serial antenna is connected to one end of a ground microstrip, and another end of the ground microstrip is short-circuited to the ground. The length of the ground microstrip is approximately one fourth of the wavelength of the center frequency of the array antenna. Feeding sections where microstrips feeding to the radiating elements are in a horn and/or groove shape. Desired frequency and bandwidth may be obtained by adjusting lengths and widths of feeding sections respectively.

Abstract: A composite antenna and array antenna using the same. The antenna has a three-layer structure including a patch antenna, a slot antenna and a transmission line. A first layer includes a patch antenna resonating at half a wavelength, a second layer includes a slot antenna resonating at half the wavelength, and a third layer includes a transmission line and a feed point. The three layers are coupled and the entire composite antenna unit satisfies a resonance condition. A signal is fed through the transmission line and coupled to the slot antenna, and the signal from the slot antenna is further coupled to the patch antenna. This composition antenna has a desirable antenna gain, and an increased antenna bandwidth compared to a single patch antenna or slot antenna.

Abstract: An array antenna of a radar includes a liquid crystal polymer (LCP) substrate with antenna transceiver circuits embedded. A plurality of patch array antennas are disposed on the LCP substrate and connected to the antenna transceiver circuit. Each patch array antenna includes a plurality of patch antennas connected in series, and the foremost patch antenna has a concave slot on the radiating surface by each side of respective feed line. By use of a LCP substrate can ensure stable material characteristics in different environments. Compared with a single patch antenna, the gain may be improved by 6 dB by connecting four patch antennas in series. A concave slot is formed on a radiating surface of a patch antenna to optimize a feed impedance, thereby to improve a working bandwidth of the antenna to alleviate an excessively narrow bandwidth of a patch antenna.

Abstract: A millimeter wave radio frequency (RF) structure uses a substrate including a liquid-crystal polymer material, at least one dual-polarized antenna, a RF transceiver module, and a switching module electrically connected to the at least one dual-polarized antenna and the RF transceiver module, where the switching module includes a first switching element and a second switching element electrically connected to the at least one dual-polarized antenna, and a third switching element electrically connected to the first switching element and the second switching element, to enhance characteristics of a liquid-crystal polymer (LCP) substrate for millimeter waves, and implement high-frequency, high-speed transmission while ensuring high reliability.

Abstract: A patch antenna includes a dielectric substrate formed by a high dielectric coefficient material covered with a soft material. The dielectric substrate has a first surface, an opposite second surface, and surrounding side surfaces there between. The patch antenna further includes a radiating metal arm formed on at least the first surface with a thin metal layer in a specific shape, a grounding metal plate disposed on the second surface, and a parasitic metal arm extending from the grounding metal plate towards the first surface via at least one of the side surfaces. The parasitic metal arm is approximate but not connected to the radiating metal arm. The radiation metal arm further includes an enclosed slot, together with the parasitic metal arm, improve the working bandwidth and high directivity of the antenna.

Abstract: An appressed antenna includes an antenna housing and a metal shell. The antenna housing comprising a housing and a planar antenna, where the planar antenna is bent with one part folded onto the inner surface of the housing and other part pressed onto the outer surface of the housing. The antenna housing is sleeve fitted to the metal shell with a gap between for the planar antenna to radiate. In this all-metal environment, the position of the antenna is close to the gap opening will increase radiation efficiency. By having at least a branch at the tail end of the appressed antenna, the appressed antenna can have a good return loss and antenna gain.

Abstract: A coupled array antenna includes a feeding network layer and a plurality of patch antennas disposed on the feeding network layer. A first patch antenna is disposed on the feeding network layer, and a second patch antenna is disposed above and coupled to the first patch antenna without contacting. A plurality of coupled array antennas are connected in series through microstrips to form a coupled array antenna device to maximize the antenna gain and bandwidth.

Abstract: A composite antenna and array antenna using the same. The antenna has a three-layer structure including a patch antenna, a slot antenna and a transmission line. A first layer includes a patch antenna resonating at half a wavelength, a second layer includes a slot antenna resonating at half the wavelength, and a third layer includes a transmission line and a feed point. The three layers are coupled and the entire composite antenna unit satisfies a resonance condition. A signal is fed through the transmission line and coupled to the slot antenna, and the signal from the slot antenna is further coupled to the patch antenna. This composition antenna has a desirable antenna gain, and an increased antenna bandwidth compared to a single patch antenna or slot antenna.