This article presents a wideband scalable 27–31-GHz 1024-element <inline-formula> <tex-math notation="LaTeX">$Ka$ </tex-math></inline-formula>-band SATCOM transmit (TX) phased array with embedded RF drivers and reconfigurable polarization. The phased array uses silicon TX beamformer (BF) chips and printed stacked-patch antennas on an FR-4 based printed circuit board (PCB) to TX either linear, rotated linear, circular clockwise, or anticlockwise polarization. It demonstrates a measured 3.5° half-power beamwidth (HPBW), 35-dB cross-polar discrimination (XPD), sub-1-dB axial ratio (AR), +49.5-dBW peak effective isotropic radiated power (EIRP) on axis, and the ability to scan to ±70° in all planes without grating lobes and <inline-formula> <tex-math notation="LaTeX">$cos^{1-1.1}(\theta)$ </tex-math></inline-formula> scan loss. The measured error vector magnitude (EVM) of less than 2.3% and the adjacent channel power ratio (ACPR) of less than −32 dBc across all scans at <inline-formula> <tex-math notation="LaTeX">$P_{1\,\text{dB}}$ </tex-math></inline-formula> make it suitable as a compact high-efficiency SATCOM transmitter. The array aperture measures 14.9 cm <inline-formula> <tex-math notation="LaTeX">$\times14.9$ </tex-math></inline-formula> cm, and it is scalable to larger phased arrays with 4096 and a higher number of elements. To the best of our knowledge, this represents the highest level of integration at millimeter waves and with the highest measured EIRP from a SATCOM phased array.

A 27–31-GHz 1024-Element Ka-Band SATCOM Phased-Array Transmitter With 49.5-dBW Peak EIRP, 1-dB AR, and ±70° Beam Scanning

This article presents a wideband scalable 17.7–20.2-GHz 1024-element <inline-formula> <tex-math notation="LaTeX">$K$ </tex-math></inline-formula>-band satellite communication (SATCOM) receive (Rx) phased array with reconfigurable polarization. The phased array uses silicon Rx beamformer (BF) chips and silicon low-noise amplifiers (LNAs) and is able to receive either linear, rotated linear, circular clockwise, or anticlockwise polarization. It demonstrates a measured 3.47° half-power beamwidth (HPBW), more than 25-dB cross-polar discrimination (XPD), and +8.1-dB/K gain-to-noise (G/T) per polarization, and has more than 80-dB Tx-band isolation. The phased array is able to scan to ±70° in all planes without grating lobes and <inline-formula> <tex-math notation="LaTeX">$\cos ^{1-1.2}(\theta)$ </tex-math></inline-formula> scan loss. The array aperture measures 22.4 cm <inline-formula> <tex-math notation="LaTeX">$\times22.4$ </tex-math></inline-formula> cm. To our knowledge, this is the largest single printed circuit board (PCB) SATCOM <inline-formula> <tex-math notation="LaTeX">$K$ </tex-math></inline-formula>-band phased-array receiver to date with the highest G/T and represents the highest level of integration at millimeter waves.

A 17.7–20.2-GHz 1024-Element K-Band SATCOM Phased-Array Receiver With 8.1-dB/K G/T, ±70° Beam Scanning, and High Transmit Isolation

This article presents a wideband scalable 17.7–20.2-GHz 1024-element <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$K$ </tex-math></inline-formula> -band satellite communication (SATCOM) receive (Rx) phased array with reconfigurable polarization. The phased array uses silicon Rx beamformer (BF) chips and silicon low-noise amplifiers (LNAs) and is able to receive either linear, rotated linear, circular clockwise, or anticlockwise polarization. It demonstrates a measured 3.47° half-power beamwidth (HPBW), more than 25-dB cross-polar discrimination (XPD), and +8.1-dB/K gain-to-noise (G/T) per polarization, and has more than 80-dB Tx-band isolation. The phased array is able to scan to ±70° in all planes without grating lobes and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\cos ^{1-1.2}(\theta)$ </tex-math></inline-formula> scan loss. The array aperture measures 22.4 cm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times22.4$ </tex-math></inline-formula> cm. To our knowledge, this is the largest single printed circuit board (PCB) SATCOM <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$K$ </tex-math></inline-formula> -band phased-array receiver to date with the highest G/T and represents the highest level of integration at millimeter waves. 

A 17.7–20.2-GHz 1024-Element <i>K</i>-Band SATCOM Phased-Array Receiver With 8.1-dB/K G/T, ±70° Beam Scanning, and High Transmit Isolation

A fabric treating apparatus includes a casing that includes a treating chamber and a machinery room that is located below the treating chamber. The fabric treating apparatus further includes a base that is located at a bottom of the machinery room. The fabric treating apparatus further includes a heat pump module that is configured to condition air supplied to the treating chamber. The fabric treating apparatus further includes at least one supporter that is configured to support the heat pump module and that defines a space between the base and the heat pump module. The fabric treating apparatus further includes a steam generating module that is located in the space and that is configured to generate steam and supply steam to the treating chamber. The fabric treating apparatus further includes a controller that is configured to control at least one of the heat pump module or the steam generating module.

Fabric treating apparatus

This paper presents a planar scalable 1024-element Ka-band SATCOM transmit (TX) phased-array with embedded RF drivers and reconfigurable polarization. The phased-array uses SiGe TX beamformer (BF) chips and printed stacked-patch antennas on a FR-4 based printed circuit board (PCB) to transmit either linear, rotated linear, circular clockwise or anticlockwise polarization. It demonstrates a measured 3.5° 3-dB beamwidth, sub 1 dB axial ratio, +48 dBW peak EIRP on axis and the ability to scan to ±70° in all planes. It is scalable to larger phased-arrays without grating lobes which makes it suitable for large SATCOM terminals with 4096 and higher elements.

A Reconfigurable Dual-Polarized 1024-Element Ka-Band SATCOM Transmit Phased-Array with Large Scan Volume and +48 dBW EIRP

We developed wide-angle beam steering AESA for Ka-band in-flight connectivity. In order to obtain wide-angle beam steering characteristics at a low cost, we adopted the three-dimensional stacked PCB structure. This structure can realize high RF performances and scalability of aperture size. Based on this concept, we made two prototypes of 16 antenna elements TX-AESA and 256 antenna elements RX-AESA and evaluated RF performances. In each of AESA prototype, we achieved the beam steering of over 70 degrees and XPD of over 20dB in 2.5GHz bandwidth.

Wide-Angle Beam Steering AESA with Three-Dimensional Stacked PCB for Ka-Band In-Flight Connectivity

This propeller fan is provided with a boss which rotates about an axis of rotation, and blades which are secured to an outer peripheral surface of the boss. Each blade includes a second protruding portion which protrudes to the positive-pressure surface side, at the rear edge in the direction of rotation. Each second protruding portion is provided in a region on the radially outer side of the center of the blade, in terms of the radial distance from the inner circumferential edge to the outer circumferential edge of the blade, and includes a protruding distal end portion where the protrusion height is maximal, a first base portion, being a part where the protrusion begins on the radially inner side of the protruding distal end portion, and a second base portion, being a part where the protrusion begins on the radially outer side of the protruding distal end portion. The protruding distal end portion is located closer to the second base portion than to the first base portion in the radial direction.

Propeller fan, propeller fan device, and outdoor equipment for air-conditioning device

A casing has a wall portion surrounding an impeller, as seen in an axial direction of a rotating shaft. The wall portion of the casing has a portion, and a portion located further away from a center of rotation of the rotating shaft than the portion, as seen in the axial direction. A curved portion has a curved surface portion located on a line connecting the center of rotation and the portion, and a curved surface portion located on a line connecting the center of rotation and the portion, as seen in the axial direction. A radius of curvature of the curved surface portion is greater than a radius of curvature of the curved surface portion.

Outdoor unit of air conditioner and refrigeration cycle device

PROBLEM TO BE SOLVED: To efficiently perform deodorization, sterilization and drying of a textile product.SOLUTION: The textile product maintenance device comprises a support part 1, a hanger attachment part 2, a fan 10, a heater 11, a tank 12, an atomizer 13, an air outlet 14, a hanger part 20, and a control part 30. The hanger part 20 is formed as a hollow structure and has a ventilation path 23, an inflow port 24 and an outflow port 25. When maintenance of clothing 100 is performed, steam is first generated by atomizing water or an oxidation inhibitor stored in the tank 12 with the atomizer 13 and the steam is released from the air outlet 14 toward the clothing 100. Thereby, deodorization and inhibiting of yellowing of the clothing 100 are performed. Then, the fan 10 and the heater 11 are driven so as to blow a hot air having a temperature higher than that of the steam to the clothing 100. Thereby, sterilization and drying of the clothing 100 are performed.SELECTED DRAWING: Figure 3

Textile product maintenance device

This heat source unit is provided with an axial flow fan and a bell mouth surrounding the outer periphery of the axial flow fan. The bell mouth comprises a cylindrical straight pipe section, a suction section which is upstream of the straight pipe section and tapered expanding toward the upstream side, and a blowout section which is downstream of the straight pipe section and tapered expanding toward the downstream side. The suction section has at least one angle-reduction section that satisfies the formula θ0 > θi > 0 when the suction section of the bell mouth is viewed in a cross section taken in a direction parallel to the flow of air, where θ0 is the angle formed by "line L1, which is parallel to the axial direction of the axial flow fan at the position of the outer peripheral edge of the suction section where the diameter is largest," and "line L2, which is perpendicular to the axial direction of the axial flow fan in the connecting area between the suction section and the straight pipe section," and θi is the angle formed by "line L2" and "line L3, which connects the intersection P between line L1 and line L2 and a position of the outer peripheral edge of the suction section where the diameter is smaller than the largest diameter but larger than the smallest diameter."

Katsuyuki Yamamoto

Papers

Wide-Angle Beam Steering AESA with Three-Dimensional Stacked PCB for Ka-Band In-Flight Connectivity

Propeller fan, propeller fan device, and outdoor equipment for air-conditioning device

Outdoor unit of air conditioner and refrigeration cycle device

Textile product maintenance device

Heat source unit and refrigeration cycle device